Question 1

What is the cheapest way to replace a key for a 2002 Lexus GS?

Accepted Answer

Call a mobile locksmith before you call the dealer. Dealers treat this as a multi-step job: parts, programming labor, and sometimes a diagnostic fee all billed separately. The total adds up fast. With EZ Car Keyz, the remote head key for this GS is one price that covers the key itself, cutting it to your vehicle, and programming it to the immobilizer. No tow. No appointment a week out. No surprise line items. Call and ask what it comes to for your situation, because all-keys-lost and adding a spare are priced differently.

Question 2

How much harder is all-keys-lost compared to just adding a spare key?

Accepted Answer

Significantly harder, and it costs more. When you have a working key, adding a spare to a 2002 GS is a relatively quick programming job. When every key is gone, the immobilizer's key memory has to be fully reset before any new key can be registered. That reset process takes longer and requires a deeper level of access to the vehicle's security system. Owners who have priced this out at dealers report the gap between a spare-while-you-have-one and an all-keys-lost job is substantial. The takeaway is simple: if you have one working key left, get a spare made now. It will cost you noticeably less than waiting until that last key disappears.

Question 3

Do aftermarket remote head keys actually work on a 2002 Lexus GS?

Accepted Answer

Sometimes, but it's a gamble. Aftermarket keys for this era of Lexus vary in quality. The shell, blade, and transponder chip all have to be correct for the specific vehicle, and not every aftermarket supplier gets all three right. The remote portion also has to match the factory radio frequency. If any one of those things is off, the key either won't start the car, won't communicate with the locks, or both. We carry keys that are verified to spec for this GS so you're not finding out the hard way after the job is already underway.

Question 4

My 2002 GS starts fine but the remote buttons stopped working. Is the key dead?

Accepted Answer

Probably not. On a remote head key, the transponder side and the remote side are independent functions. If the car starts normally, the transponder is doing its job. Dead buttons on an otherwise working key point to the CR1616 battery first. These batteries are thin and easy to find, but owners sometimes install them upside down or the contacts get a little corroded over the years. Pop the key head open, check the battery orientation, clean the contacts, and try a fresh CR1616. If the buttons still don't respond after that, the remote receiver in the car or the fob's circuit board may need attention, but nine times out of ten on a key this age it's just the battery.

Question 5

Can the stolen or lost remote head key for my 2002 GS be used to start the car if someone finds it?

Accepted Answer

Yes, unless the key memory is wiped. That's the part people don't think about until after a theft. The transponder chip in a programmed key is what the immobilizer recognizes. If that key still exists somewhere and the memory hasn't been cleared, it can still start your car. All-keys-lost service includes a full memory wipe as the first step, which is exactly why it matters after a stolen key situation. If you lost a key but still have a spare, the safer move is still to have the lost key erased from the system so you're not leaving that door open.

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2002 Lexus GSKey Replacement - Save vs Dealer in San Diego

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