2002 BMW 7 Series Key Replacement

The 2002–2008 7 Series uses the same key setup, so everything on this page applies to those years too. The full picture is on the BMW 7 Series key guide.

2002 BMW 7 Series: key facts

Key type: Smart / proximity key
Push-to-start: Yes
Transponder chip: ID46 (PCF7945, Hitag2)
Programming: OBD
All keys lost: We can originate new keys on site

First CAS car: fob inserts into the dash slot, Start button standard. Trade sources conflict on when CAS1 gave way to CAS2 within 2002-2008 — the ID46 key family is the same and both are programmable by specialists via OBD/bench; module generation confirmed per VIN. European catalogs list 868 MHz fobs; US-market cars use 315 MHz versions of the same key family.

What kind of key does a 2002 BMW 7 Series use?

This is the first of BMW's CAS-era cars. There is no blade to turn in an ignition. You push the fob into a slot in the dash and press the Start button. Inside the fob is an ID46 transponder chip (PCF7945, Hitag2 family), and the car checks that chip before it lets the engine run.

The fob also carries a mechanical backup key. That emergency blade is there for getting into the car if the fob battery has died, so a weak fob does not have to mean being stuck outside the car.

One detail matters if you are thinking of buying a fob online. European catalogs list 868 MHz fobs, while US-market cars use 315 MHz versions of the same key family. A fob from a European listing may not be the right version for a car sold here, so check with us before you order one. We can also look at the BMW 7 Series key page if you want to see how this year compares with the others.

Spare key or all keys lost: how we handle this car

For this setup, you do not need an original key to get a new one made. A spare can be made from your existing fob, and an all-keys-lost situation is also possible to solve. Programming is done through the OBD port, and this year does not require NASTF SDRM access for that work.

Here is how a typical visit goes:

You call (213) 577-1366 and tell us the year, model and where the car is parked.
We confirm you own the car and read the VIN so the fob and the car's key module match.
We supply the right fob for the car, including the correct frequency version and the mechanical backup blade.
We program the new key to the car through the OBD port. If the module needs bench work, we tell you before we start.
We test everything: the dash slot, the Start button, the door lock and the emergency blade.

Is it really the key? Common problems on this year

Before anyone sells you a new fob, it is worth working out whether the key is the actual fault. On this generation, three problems show up again and again:

A dead or worn-out rechargeable fob battery. The dash slot still reads the fob, so the car usually starts anyway. The trouble tends to be the remote functions and door entry.
Electronic steering-lock (ELV) faults that look like key failures. The car refuses to start and the key gets blamed, but a new key will not fix it.
A worn dash key slot or a cracked fob shell. A tired slot can make a good fob read poorly, and a cracked shell is a different repair from a dead chip.

Locked out or need a locksmith now?

We answer around the clock, every day of the year.

Call (213) 577-1366

What affects the price of a 2002 7 Series key?

We do not quote numbers on a web page, because the real cost depends on your car and your situation. These are the things that move it:

Whether you still have a working key. Copying from one is usually the more economical route compared with an all-keys-lost job.
The condition of your existing fob. A cracked shell or tired battery may be a lighter-cost fix than a whole new key.
Which key module your car has, which we confirm from the VIN.
Whether the real fault is the steering lock (ELV) and not the key.
Whether the work can be done through the OBD port or needs bench work.
Where the car is and what hour you call. Our vans come to you, or you can visit the storefront.

What we confirm by VIN, and why call us

Here is the honest part. Trade sources disagree on exactly when BMW moved from the first CAS module to the second one somewhere in the 2002 to 2008 range. The ID46 key family is the same for both, and specialists can program both through OBD or on the bench. But we do not guess which module your car has. We read it from the VIN, in person, before we cut or program anything.

Wilshire Lock & Key has been in business since 1987, with a storefront at 10740 Wilshire Blvd in Westwood and mobile vans serving 140 cities across Los Angeles and Ventura counties. You get one company, not a dispatch middleman, and David, the owner and lead technician, oversees the work. Our line, (213) 577-1366, is answered around the clock. For other models, see our BMW key services or the full car key section, or use the contact page to reach us.

Frequently asked questions

Can you make a key for a 2002 BMW 7 Series if I lost every key?

Yes. For this setup, an all-keys-lost job is possible and no original key is needed. We read the VIN, confirm ownership, supply the correct fob and program it through the OBD port.

Do I need my original key to get a duplicate?

No. The data for this year shows duplication does not require an original key. Having a working key still usually makes the job simpler and the more economical route.

Does the 2002 7 Series have a transponder chip?

Yes. The key uses an ID46 chip (PCF7945, Hitag2 family) inside the fob. The car checks the chip when you insert the fob into the dash slot.

My fob stopped working. Do I need a whole new key?

Not necessarily. A dead rechargeable battery is common, and the dash slot still reads the fob, so the car usually starts. A cracked shell or worn slot can also be the cause. We check first.

Could my starting problem be the steering lock and not the key?

It could. Electronic steering-lock (ELV) faults can look just like a key failure. We diagnose that before replacing a fob that may not be at fault.

Which fob frequency does my car need?

European catalogs list 868 MHz fobs, and US-market cars use 315 MHz versions of the same key family. We confirm by VIN so you do not end up with the wrong version.

Is programming a dealer-only job on this car?

Not by what we have verified for this year. Specialists can program it through the OBD port, and the module generation is confirmed by VIN. If bench work is needed, we tell you up front.

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Reviewed by David, Owner & Lead Technician, Wilshire Lock & Key — in the locksmith trade since 1987.

Last updated 2026-10-11.