BMW M5 Key Replacement in San Diego (2000-2003)

Yes. More involved than a routine spare but we run this regularly. The E39 M5 uses the EWS3 immobilizer with an ID44 transponder that must be programmed to the car ECU. We handle that through the OBD-II port using BMW-specific diagnostic hardware. All keys lost means the car stays put and we come to it. (619) 876-1271 and we will walk through exactly what to expect.

Three-button remote head key, laser-cut blade, ID44 transponder chip operating at 315 MHz. The blade handles door cylinders and ignition; the transponder talks to the EWS3 module to authorize engine start. We cut the blade and program the chip on-site, typically $350 to $600 depending on whether you have a working key or all are lost.

Because the blade is only half the equation. Turning the ignition cylinder is the mechanical part, but the EWS3 module still needs to recognize the transponder chip in the key before allowing the engine to fire. New blade without a programmed ID44 chip is basically a fancy piece of cut metal. We program the transponder over OBD-II at your car, full process typically under 45 minutes.

Expect $350 to $600 from us, which covers the laser-cut blade, new remote head key with ID44 transponder, and full EWS programming. Dealer pricing on this typically lands at $450 to $700 or higher, plus a tow if the car will not start. We are BSIS licensed (LCO#6792), mobile across San Diego, and the quote happens before we drive out. (619) 876-1271 for an exact number on your specific situation.