(512)523-4550

Lexus LS400 Key Replacement Austin TX - (512)523-4550

If you need a Lexus LS 400 key replacement in Austin, Austin Car Key provides mobile service for lost keys, duplicate keys, transponder-key programming on applicable models, remote replacement, ignition problems, broken-key extraction, and vehicle lockouts. The Lexus LS 400 was sold in the United States from the 1990 through 2000 model years, spanning two generations and an important transition in Lexus key technology. Earlier LS 400 models use conventional physical keys, while later vehicles add an electronic engine immobilizer and transponder-based starting authorization. All LS 400 models use a physical key inserted into the ignition rather than the proximity SmartAccess system found on later Lexus vehicles. Our automotive locksmith can provide Lexus LS 400 key replacement at your location in Austin.



Lexus LS 400 Key Replacement Guide

The Lexus LS 400 launched the Lexus brand in the United States for the 1990 model year and remained in production through 2000. The first-generation LS 400 covers 1990–1994, while the redesigned second generation covers 1995–2000.

Key replacement varies considerably across this eleven-model-year span. Early LS 400 vehicles use conventional mechanical keys. Later LS 400 vehicles incorporate electronic engine-immobilizer technology, requiring both a correctly cut physical key and a compatible electronic credential for normal starting.

1990–1994 Lexus LS 400 Keys

The first-generation 1990–1994 LS 400 uses a conventional physical ignition key and predates the later Lexus transponder-based engine-immobilizer systems.

Replacement primarily involves accurately originating or duplicating the mechanical blade. The condition of the ignition cylinder and locks also becomes increasingly important on vehicles of this age.

Remote locking, where equipped, should be treated separately from the mechanical starting key.

1995–1997 Lexus LS 400 Keys

The redesigned 1995–1997 LS 400 continues to use a conventional physical key inserted into the ignition.

These vehicles belong to the period before the later LS 400 transponder-based starting system became the central key-replacement concern. Mechanical blade accuracy, remote functions where equipped, and the condition of the ignition and locks should be considered separately.

Because these vehicles are now decades old, previously replaced lock or ignition hardware can also affect replacement-key work.

1998–2000 Lexus LS 400 Keys

The later 1998–2000 LS 400 adds an electronic engine immobilizer and uses a physical transponder key.

A complete starting key requires both the correct mechanical blade and a compatible transponder key credential recognized by the vehicle.

The key must still be inserted and turned in the ignition. These vehicles do not use proximity SmartAccess or push-button start.

Early LS 400 Mechanical Key

On an early LS 400, the physical blade performs the primary key functions. If the blade is accurately cut and the mechanical lock or ignition is in good condition, no modern proximity-key registration is involved.

This can make an early LS 400 mechanically simpler to replace than a later immobilizer-equipped vehicle, but age-related wear can complicate the job.

A heavily worn original key should not automatically be used as the ideal pattern for another duplicate.

1998–2000 LS 400 Transponder Key

The later LS 400 combines a physical ignition key with an electronic immobilizer credential.

The blade mechanically operates the ignition while the transponder provides electronic starting authorization. These are separate functions contained in the same replacement-key system.

A mechanically correct key can therefore turn the ignition yet fail to start the engine if its transponder is missing, incompatible, or not recognized.

LS 400 High-Security Key Blade

Later LS 400 applications use a high-security sidewinder-style mechanical blade. This blade design should not be confused with the transponder itself.

A high-security or “laser-cut” blade describes the mechanical portion of the key, while the transponder describes its electronic engine-authorization function.

A later LS 400 replacement can require both high-security key cutting and electronic transponder programming.

LS 400 Master Key

Later immobilizer-equipped LS 400 vehicles can distinguish between master and sub-key credentials.

A recognized master key can be important when adding another compatible electronic credential using registration functions supported by the immobilizer system.

If a reliable master key remains, making another complete spare before it is lost can reduce the complexity of future replacement.

LS 400 Sub Key

An applicable sub key can provide starting authorization while offering more limited mechanical access than a full master key.

This distinction matters when replacing or duplicating an existing key because a key that starts the LS 400 is not necessarily identical in function to the original master key.

The existing key and the desired replacement functions should be identified before duplication.

LS 400 Remote Keyless Entry

Remote Keyless Entry should be distinguished from the LS 400's mechanical key and, on later vehicles, its immobilizer transponder.

A remote can stop locking and unlocking the vehicle while the physical starting key continues to operate normally.

Likewise, successful remote operation on an immobilizer-equipped LS 400 does not by itself prove that the transponder credential is being recognized.

LS 400 Remote and Transponder Functions

On a later immobilizer-equipped LS 400, remote convenience functions and engine authorization are separate electronic jobs.

The transponder communicates with the immobilizer during starting. Remote electronics communicate with the vehicle's wireless locking system.

When troubleshooting a key, each function should be tested separately rather than assuming the entire key has failed.

Does the Lexus LS 400 Have Push-Button Start?

No. The U.S. Lexus LS 400 uses a physical ignition key throughout its 1990–2000 production run.

Even the later immobilizer-equipped LS 400 requires the physical key to be inserted and turned in the ignition.

Proximity SmartAccess and push-button-start systems belong to later Lexus technology and should not be confused with the LS 400 key system.

Does the LS 400 Use Lexus SmartAccess?

No. The LS 400 predates the Lexus proximity SmartAccess system.

Later LS 400 keys can contain electronic transponder technology, but a transponder key is not the same as a proximity Smart Key.

This distinction is important when shopping for replacement keys online.

LS 400 Engine Immobilizer

Later LS 400 models use an electronic engine immobilizer that must recognize an authorized transponder credential before normal engine operation is permitted.

The mechanical blade can still turn the ignition independently of whether electronic authorization succeeds.

A security-related no-start does not automatically mean the vehicle's ECU needs replacement. The key, transponder reader, immobilizer components, wiring, electrical condition, and communication between systems should be checked first.

LS 400 Security Indicator

On an immobilizer-equipped LS 400, the security indicator can provide useful information when diagnosing an electronic key-recognition problem.

Unexpected indicator behavior can accompany a transponder problem, but the indicator alone does not identify which component has failed.

The key and vehicle-side immobilizer system should be considered together during diagnosis.

LS 400 vs. LS 430 Keys

The LS 430 replaced the LS 400 for the 2001 model year and uses a newer generation of Lexus security technology.

An LS 430 key should not automatically be assumed compatible with an LS 400 merely because both vehicles belong to the Lexus LS family.

Mechanical blade design, transponder electronics, remote functions, and immobilizer applications should be matched to the exact vehicle.

LS 400 vs. Lexus GS Keys

The LS 400 and Lexus GS models from overlapping years can use similar Toyota/Lexus key technology.

Shared technology does not establish key interchangeability. Blade specifications, transponder credentials, remote electronics, and immobilizer applications can differ.

A similar-looking GS key should therefore not automatically be purchased as an LS 400 replacement.

LS 400 vs. Lexus SC Keys

The LS 400 and Lexus SC 300/SC 400 were sold during overlapping years and share some Toyota/Lexus security technology.

This does not mean their keys are universally interchangeable. The exact model year and key application should be verified before cutting or programming.

Appearance alone is not sufficient for electronic compatibility.

Similar-Looking Lexus LS 400 Keys

Toyota and Lexus used several visually similar key housings during the LS 400 production period.

Two keys can look similar while having different mechanical cuts, remote electronics, or transponder requirements.

The exact LS 400 model year and security configuration should therefore be identified before replacement.

Used Lexus LS 400 Keys

A used LS 400 key should be checked before cutting or electronic programming is attempted.

For an immobilizer-equipped vehicle, transponder compatibility and applicable reuse requirements matter in addition to the physical condition of the key.

Compatibility should preferably be established before permanently cutting a replacement blade.

Aftermarket Lexus LS 400 Keys

An aftermarket LS 400 key can be a practical replacement when its mechanical and electronic specifications match the exact vehicle.

Not every key advertised broadly for 1990s Lexus vehicles is suitable for every LS 400 model year.

A customer-supplied key should therefore be verified before cutting or Lexus LS 400 key programming is attempted.

LS 400 Key Blade Wear

Every LS 400 uses a physical ignition key, so mechanical blade wear is particularly relevant as these vehicles age.

If a less-used spare turns substantially better than the everyday key, the primary blade may be worn. Producing a fresh key to proper specifications can sometimes restore smoother operation.

Directly tracing a heavily worn key can reproduce its worn dimensions rather than restoring the intended cuts.

LS 400 Ignition Cylinder Wear

The LS 400 uses a mechanical ignition cylinder, and decades of operation can produce internal wear.

If several accurately cut keys bind, stick, or require jiggling in the same ignition, the cylinder becomes a stronger suspect than the individual key.

An ignition locksmith can inspect the mechanical system before unnecessary additional keys are made.

Previously Replaced LS 400 Ignition or Locks

An older LS 400 may have had an ignition cylinder, door lock, trunk lock, or other mechanical hardware replaced during a previous repair.

If replacement hardware was keyed differently, original factory key information may no longer correspond with every lock currently installed.

The actual hardware should be considered whenever a replacement produced from original information does not operate as expected.


Lost Lexus LS 400 Key Replacement

If you've lost your car keys and no working Lexus LS 400 key remains, a replacement can still be made. The procedure depends on the model year and security system.

For an early mechanical-key LS 400, replacement primarily involves originating the correct mechanical blade. The actual condition and configuration of the ignition and locks should also be considered.

For a later immobilizer-equipped LS 400, the replacement requires both an accurately cut blade and a compatible electronic transponder credential.

If no recognized master credential remains, the applicable all-keys-lost immobilizer recovery or reset procedure may be required before replacement credentials can be established.

Your vehicle's VIN can help identify the exact LS 400 and applicable original key information. Proof of ownership and identification should be available before all-keys-lost service is performed.

Because every LS 400 is now an older vehicle, previously replaced ignition or lock hardware should be considered if a key produced from original factory information does not mechanically operate as expected.

If an immobilizer-equipped LS 400 key was lost or stolen, ask whether the missing credential can be removed from authorized memory when supported by the applicable system and procedure.


Duplicate & Spare Lexus LS 400 Keys

If you still have a reliable working LS 400 key, making a duplicate car key can help prevent a more complicated all-keys-lost situation.

For an early mechanical-key LS 400, a duplicate primarily requires an accurately cut blade. For an immobilizer-equipped later vehicle, the replacement also requires a compatible transponder credential.

Before duplicating an older key, inspect it for wear. If a less-used spare operates substantially better, producing the replacement to proper specifications can be preferable to directly tracing the worn everyday key.

If remote functions are included, test them independently after replacement. A complete test can include applicable door locks, trunk access, ignition operation, engine starting, and wireless remote functions.


Lexus LS 400 Key Programming

Lexus LS 400 key programming depends on the model year. Early mechanical-key vehicles do not require modern electronic starting-key programming, while later immobilizer-equipped models require a compatible transponder credential to be recognized by the vehicle.

Mechanical cutting, transponder authorization, and Remote Keyless Entry functions should be treated separately.

Early LS 400 Mechanical Key

A conventional mechanical LS 400 key does not require transponder programming for engine authorization.

The important requirement is an accurately cut blade that operates the installed ignition and applicable locks.

If a freshly originated key does not operate correctly, mechanical wear or previously replaced hardware should be considered.

Later LS 400 Transponder Programming

On an immobilizer-equipped LS 400, a compatible transponder credential must be recognized by the vehicle before normal engine operation is permitted.

The mechanical blade can turn the ignition independently of whether electronic authorization succeeds.

After programming, the replacement should be tested independently by starting the vehicle.

Adding Another LS 400 Transponder Key

When a recognized master credential remains, another compatible transponder key can be added using registration functions supported by the applicable immobilizer system.

The replacement should first be verified for the exact LS 400 application and mechanically cut correctly.

Making a spare while a recognized master key remains can simplify future replacement.

LS 400 All Keys Lost Programming

If every recognized master credential has been lost on an immobilizer-equipped LS 400, the normal additional-key process may no longer apply.

The applicable immobilizer recovery or reset procedure is required before replacement electronic credentials can be established.

The exact process should be matched to the LS 400 security system rather than assuming that programming instructions for a later Lexus model apply.

LS 400 Immobilizer Reset

An applicable immobilizer reset or recovery process can allow replacement electronic credentials to be established when no recognized master key remains.

Previously registered credentials can be affected during the applicable procedure. Keys intended for continued use should therefore be available when required.

An immobilizer reset should not be confused with remote programming or simply replacing a battery inside a remote.

LS 400 Remote Programming

Remote Keyless Entry functions are separate from engine-immobilizer authorization.

A remote can require its own registration procedure while the physical or transponder starting key performs a different function.

A remote that locks and unlocks the doors does not by itself prove that an immobilizer-equipped key will start the engine.

LS 400 Key Cutting

The LS 400 requires accurate mechanical key cutting for its ignition and applicable locks.

Online car key cutting or another mechanical cutting service can address the blade when correct information is available, but cutting alone does not program the transponder on an immobilizer-equipped vehicle.

A complete later-model replacement must address both mechanical and electronic requirements.

LS 400 Lost-Key Erasure

If an immobilizer-equipped LS 400 transponder key was lost or stolen, ask whether its credential can be removed from authorized memory when supported by the applicable system and procedure.

Removing a missing credential is different from simply adding another replacement key.

Keys intended for continued use should be available during service when required by the procedure.

LS 400 Programming Failure

A later LS 400 transponder that will not register does not automatically mean an expensive control module has failed.

An incorrect transponder application, damaged key, low vehicle voltage, transponder-reader problem, immobilizer fault, wiring issue, or communication problem can interfere with registration.

The key and vehicle-side security system should be diagnosed before the ECU or other modules are replaced.


Lexus LS 400 Key, Remote & Ignition/Starting Problems

A Lexus LS 400 that will not unlock or start does not automatically need another key. Mechanical blade wear, ignition-cylinder wear, electronic immobilizer problems on later vehicles, low battery voltage, remote faults, and unrelated starting-system problems can produce similar symptoms.

LS 400 Key Turns but Engine Will Not Start

On an immobilizer-equipped LS 400, the blade can mechanically turn the ignition while the electronic transponder credential is not recognized.

An incorrect, damaged, or unauthorized transponder is one possibility, but vehicle battery, starter, fuel delivery, wiring, engine-management, and other faults can also cause a no-start.

If another recognized key starts the vehicle normally, the first key becomes a stronger suspect.

LS 400 Security Indicator Behaves Differently

On an immobilizer-equipped LS 400, unexpected security-indicator behavior can accompany an electronic key-recognition problem.

The indicator alone does not identify whether the key, transponder reader, immobilizer electronics, wiring, or another component has failed.

The complete security system should be considered during diagnosis.

LS 400 Remote Works but Engine Will Not Start

Remote operation and engine authorization are separate functions.

On an immobilizer-equipped LS 400, the remote can operate while the transponder credential is not recognized. Vehicle battery, starter, fuel, engine-management, and other faults can also cause a no-start.

A working remote therefore does not prove that the complete starting system is functioning normally.

LS 400 Starts but Remote Does Not Work

If the LS 400 starts normally but its remote does not operate, the starting key can still be valid.

A weak remote battery, worn buttons, damaged transmitter electronics, registration issue, poor battery contacts, or a vehicle-side receiver problem can affect remote operation separately.

The wireless function should therefore be diagnosed independently.

LS 400 Key Is Hard to Turn

A worn, bent, damaged, or poorly cut LS 400 key can become difficult to turn.

If a less-used spare works substantially better, blade wear becomes more likely. If several accurately cut keys bind in the same ignition, the cylinder becomes a stronger suspect.

Continuing to force a binding key can eventually damage or break the blade.

LS 400 Key Works Only When Jiggled

A key that must be jiggled to operate the ignition can indicate wear in the blade, ignition cylinder, or both.

Comparing the everyday key with a less-used spare can help isolate the problem.

If multiple properly cut keys behave the same way, the ignition cylinder should be inspected.

LS 400 Key Is Stuck in the Ignition

A stuck LS 400 key can involve blade wear, ignition-cylinder problems, steering pressure, transmission position, ignition components, or related interlocks.

Avoid excessive twisting or pulling because the blade can break inside the ignition.

If normal operating checks do not release the key, the mechanical ignition should be inspected.

Broken Lexus LS 400 Key

An LS 400 key can break because of blade wear, repeated bending, physical damage, or excessive force against a binding ignition.

If part of the blade remains inside the ignition or door lock, professional extraction can often remove it without unnecessarily replacing the complete cylinder.

If the blade broke while turning, the ignition should also be inspected for mechanical binding before another key is used.

LS 400 Spare Key Works Better

If a less-used spare operates smoothly while the everyday key sticks or requires jiggling, the everyday blade is likely more worn.

This comparison is particularly useful on an older vehicle such as the LS 400 because decades of mechanical use can substantially alter the blade profile.

A replacement produced to proper specifications can be preferable to copying the worn key directly.

Several LS 400 Keys Are Hard to Turn

If several correctly cut keys have the same difficulty in the ignition, the ignition cylinder becomes a stronger suspect.

Making additional copies is unlikely to correct a worn or damaged cylinder.

The mechanical ignition should be inspected before the condition worsens or a key breaks inside it.

LS 400 Vehicle Battery Is Weak

Low vehicle voltage can create starting and electronic-security symptoms that initially appear to be key related.

On later immobilizer-equipped vehicles, the transponder reader, immobilizer electronics, engine controls, and starter system all depend on adequate electrical power.

If multiple previously working keys suddenly produce the same symptoms, checking the vehicle battery and electrical condition is an important diagnostic step.


Lexus LS 400 Lockout Service

If your Lexus LS 400 key is locked inside the vehicle, replacement may not be necessary. Austin Car Key provides car door unlocking to regain access and retrieve the existing key.

Professional vehicle entry helps avoid unnecessary damage to glass, paint, weather stripping, door trim, mechanical locks, and electronic locking components.

A lockout should be distinguished from an all keys lost situation. If a functioning LS 400 key is simply inaccessible inside the vehicle, retrieving it can avoid unnecessary key origination and programming.

If the recovered key is your only reliable working key, making a complete spare afterward can reduce the risk of a more complicated future replacement.


Dealer vs. Locksmith

A Lexus dealer or Lexus parts source can help identify OEM key applications and applicable security components for the LS 400.

A properly equipped mobile automotive locksmith may be able to originate a lost LS 400 key, duplicate a working key, cut applicable high-security blades, program a later transponder credential, service remote functions, extract a broken key, diagnose mechanical ignition problems, and unlock the vehicle at its location.

Because the LS 400 is an older vehicle, actual mechanical condition matters. A new transponder cannot correct a worn ignition cylinder, and an accurately cut blade cannot correct an unrelated engine or electrical no-start.

Mobile service can avoid vehicle transport when the required cutting, programming, and mechanical work can be completed at the vehicle.

For information on locating a Lexus service facility or parts source, use our find a dealer resource.


Lexus LS 400 Key Replacement Cost in Austin

The cost of Lexus LS 400 key replacement depends on the model year, whether the vehicle uses a conventional mechanical key or an electronic immobilizer key, whether a working key remains, and the condition of the ignition and locks.

Service TypeEstimated Price
Older LS 400 Mechanical Key Duplicate$40 – $80
Older LS 400 Mechanical Key - All Keys Lost$80 – $140
Later LS 400 Duplicate Transponder Key$90 – $140
Later LS 400 Lost Transponder Key$150 – $220
LS 400 Transponder Programming$80 – $160
LS 400 Remote Replacement / Programming$60 – $120
Lexus LS 400 Lockout$75 – $140
Broken Key Extraction$90 – $160
Mechanical Ignition Service$180 – $300+

All prices are estimates. Final pricing depends on the exact model year and key system, whether a recognized key remains, transponder requirements on applicable vehicles, mechanical cutting, remote functions, parts availability, and the condition of the ignition and locks. A technician can provide a final quote before beginning service.


Client Questions

What years was the Lexus LS 400 sold in the United States?

The Lexus LS 400 was sold in the U.S. from the 1990 through 2000 model years. The LS 430 replaced it for 2001.

What type of key does a Lexus LS 400 use?

It depends on the year. Earlier LS 400 models use conventional physical keys, while later models add electronic engine-immobilizer and transponder technology.

Does every Lexus LS 400 use a transponder key?

No. Early LS 400 models predate the later transponder-based engine-immobilizer system. The exact model year should be identified before selecting a replacement key.

Do 1990–1994 Lexus LS 400 models use transponder keys?

No. These early first-generation LS 400 vehicles use conventional physical ignition keys rather than modern transponder-based engine authorization.

Do 1998–2000 Lexus LS 400 models use transponder keys?

Yes. Later LS 400 vehicles use a physical transponder key with electronic engine-immobilizer authorization.

Does a Lexus LS 400 have push-button start?

No. Every U.S. LS 400 uses a physical key inserted into the ignition.

Does the Lexus LS 400 use SmartAccess?

No. The LS 400 predates the proximity Lexus SmartAccess system used on later vehicles.

Does a Lexus LS 400 key need programming?

It depends on the year. Early mechanical keys do not require electronic engine-authorization programming. Later immobilizer-equipped LS 400 keys require a compatible transponder credential recognized by the vehicle.

Does a later LS 400 use a laser-cut key?

Later LS 400 applications use a high-security sidewinder-style blade commonly described as laser cut. The mechanical blade and electronic transponder are separate parts of the complete key system.

Can you make a Lexus LS 400 key if all keys are lost?

Yes. An early LS 400 primarily requires mechanical key origination. An immobilizer-equipped later LS 400 also requires the applicable electronic credential and all-keys-lost procedure.

Can a lost LS 400 transponder be erased?

On an immobilizer-equipped LS 400, ask whether the missing credential can be removed from authorized memory when supported by the applicable system and procedure.

Can a Lexus LS 400 key be made from the VIN?

The VIN can help identify the vehicle and applicable original key information. Because the LS 400 is an older vehicle, previously replaced ignition or lock hardware may no longer match the original factory configuration.

Can I order a Lexus LS 400 key cut online?

Online car key cutting can address the mechanical portion when correct information is available. On an immobilizer-equipped vehicle, transponder programming remains a separate requirement.

Is an LS 400 key the same as an LS 430 key?

Not automatically. The LS 430 belongs to a later generation and uses newer security technology. Exact mechanical and electronic compatibility should be verified.

Is an LS 400 key the same as a Lexus GS key?

Not automatically. The vehicles can use related Toyota/Lexus technology during overlapping years, but blade, transponder, remote, and immobilizer applications can differ.

Is an LS 400 key the same as an SC 400 key?

Not automatically. Similar appearance and shared Lexus technology do not guarantee that the mechanical or electronic key application is identical.

Can I use a used Lexus LS 400 key?

A used key should be checked for the exact mechanical and, where applicable, electronic requirements before cutting or programming is attempted.

Can I use an aftermarket Lexus LS 400 key?

An aftermarket replacement can be an option when its mechanical and electronic specifications match the exact LS 400 application.

Why does my LS 400 key turn but the engine will not start?

On an immobilizer-equipped later LS 400, the transponder may not be recognized. Vehicle battery, starter, fuel, wiring, engine-management, and other faults can also cause a no-start.

Why does my LS 400 remote work but the engine will not start?

Remote operation and engine authorization are separate functions. On an immobilizer-equipped LS 400, a working remote does not prove that the transponder credential is being recognized.

Why does my LS 400 start but the remote does not work?

A weak remote battery, damaged buttons, transmitter electronics, registration issue, or vehicle-side receiver problem can affect remote operation separately from engine starting.

Will changing my LS 400 remote battery erase the transponder?

Normally, no. The remote battery and immobilizer transponder credential perform separate functions.

Why is my Lexus LS 400 key hard to turn?

The blade may be worn or damaged, or the ignition cylinder may have mechanical wear. If a less-used spare works better, the everyday key becomes a stronger suspect. If several accurately cut keys bind, the ignition cylinder should be inspected.

Why do I have to jiggle my LS 400 key?

Jiggling can temporarily compensate for blade wear, ignition-cylinder wear, or both. Comparing the everyday key with a less-used spare can help identify the more likely cause.

Why does my spare LS 400 key work better than my regular key?

A less-used spare often retains its original blade dimensions better than a heavily used everyday key. If the spare operates smoothly, the everyday blade may be worn.

Can you remove a broken key from an LS 400 ignition?

In many cases, a broken blade can be professionally extracted without replacing the complete ignition cylinder. If the blade broke while turning, the ignition should also be inspected for binding or wear.

Can you unlock my Lexus LS 400 if the key is inside?

Yes. If a functioning key is simply locked inside the vehicle, professional vehicle unlocking can regain access without unnecessarily making another key.


Lexus LS 400 Key Replacement in Austin

The 1990–2000 Lexus LS 400 spans an important transition in automotive key technology. Early vehicles use conventional physical keys, while later LS 400 models add electronic transponder-based engine-immobilizer authorization. All LS 400 models retain a physical inserted ignition key rather than proximity SmartAccess or push-button start.

Because these vehicles are now older, good LS 400 key service also requires attention to mechanical wear. A worn blade, aging ignition cylinder, or previously replaced lock can create problems that electronic programming alone cannot correct.

If you still have a reliable working LS 400 key, making a spare now can help prevent a more complicated all keys lost situation. If every key is already missing, replacement is still possible using the mechanical and, where applicable, electronic procedure appropriate for the model year.

For Lexus LS 400 key replacement, duplicate keys, lost-key service, transponder programming, remote problems, ignition service, broken-key extraction, or vehicle unlocking in Austin, contact Austin Car Key for mobile service at your location.

Types of Services

Choose the closest option and add details in your message so we can dispatch the right help.

Duplicate Keys

Need a spare key? Get an extra made so you’re not stuck next time.

Schedule duplication

Ignition Repair

Key won’t turn or ignition feels stuck? We can diagnose and help on-site.

Schedule ignition help

Service Area