Question 1

How do I spot a fake locksmith before I get ripped off?

Accepted Answer

Three things. First, a real business name with verifiable Google and Yelp reviews. Scam operations cycle through dozens of phone numbers that route to the same call center. Second, ask for a firm estimate on the phone for your specific vehicle. Vague pricing or a refusal to give any number before arriving is a red flag. Third, ask for their California BSIS license number on the spot. Every legitimate locksmith company in this state has one and will give it to you without hesitation. If they stall, hang up.

Question 2

What exactly is a remote head key and how does it work on the 2000 Lexus LX?

Accepted Answer

A remote head key combines the ignition key and the keyless entry remote into one piece. The key blade turns the ignition cylinder the same as any mechanical key. Built into the plastic head is a transponder chip that communicates with the vehicle's immobilizer when you turn the key. There's also a small battery inside that powers the three remote buttons for locking and unlocking. The chip and the remote run independently, which is why a dead battery kills your remote range but doesn't stop the car from starting. Both functions need to be working for the key to do its full job, and if the key itself is lost or damaged, a replacement needs to be both cut to your vehicle and programmed to the immobilizer before it will start the engine.

Question 3

What equipment do you use to program a key for the 2000 Lexus LX?

Accepted Answer

For this generation of Lexus, I use a professional OBD-based immobilizer programmer to register the transponder chip to the vehicle. If a key is being extracted or decoded from the lock, I use dedicated picking and decoding tools to read the cut non-destructively. The 2000 LX does not require the factory security-data access or secure-gateway credentials that newer vehicles demand, so the job moves quickly on site without waiting on dealer authorization. If a locksmith can't tell you what tool they're using on your specific year and model, that's worth questioning before you let them start.

Question 4

I have one working key for my 2000 Lexus LX. Should I get a spare made now or wait until I need one?

Accepted Answer

Make the spare now. All-keys-lost on a vehicle this age takes longer and costs more than adding a second key while a working one exists. With a working key present, the programming process is faster and simpler. Without any working key, the procedure is more involved. A broken or lost sole key also means you may need extraction or lock decoding before anything else can happen. Getting a spare cut and programmed while things are easy is the move.

Question 5

The remote buttons on my 2000 Lexus LX stopped working but the car still starts fine. What's going on?

Accepted Answer

Almost certainly the CR1616 battery. The remote and the transponder chip in this key run off separate power sources. The chip reads off the car's ignition ring, so it keeps working even when the fob battery is dead. The remote buttons have no backup, so when the CR1616 drains, lock and unlock just stop responding.

Swap the CR1616 first. When you open the key head, check that the battery is seated flat and the contacts aren't bent or corroded. A slightly misaligned cell can look fine and still fail to make a clean connection. If a fresh battery seated correctly doesn't bring the remote back, then it's worth looking at whether the fob itself has an issue, but that's the less common outcome.

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