Skip the auto shop - Our mechanics make house calls

Q: If I replace the ignition switch, can I use my existing BMW Keys with remote and valet key?

asked by on

2007 BMW X3. I believe my ignition switch has gone bad. Turning the key 'ON' lights the dash and the accessories work (radio, A/C, etc.). But turning the key to the 'start' position has no response. I have a remote starter installed on this car and it starts and runs fine using the remote starter, so the starter is ok. Also when remote started, and I insert the key and turn the ignition 'ON', then press the brake pedal (which shuts off the remote starter), the car continues to run with the ignition switched 'ON'. So the ignition switch works in the 'ON' position for running and accessories. It seems only to be defective in the 'Start' position (at least for now). So my major question is, if I replace the ignition switch, can I use my existing BMW Key Fobs (with transponder chip) and the valet key (with transponder chip) with the new ignition switch? Or, do I also need to purchased new BMW key fobs and valet key and have them 'programmed' into the vehicle? Thanks!

My car has 95000 miles.
My car has an automatic transmission.

A: Yes, you can. The ignition switch is separa...

Yes, you can. The ignition switch is separate from the EWS system, so replacing the switch will still allow you to use the current keys you already have. Only if you have to replace a faulty key or EWS module will you have to possibly order all new keys.

One other possibility is there is an EWS issue where the key is not being properly identified not allowing the starting sequence. This would mean ordering an EWS module or keys from the dealer. Try out all keys you have to see if any will commence in the starting sequence. If none of the keys will start the vehicle, faults should be checked to ensure there are no EWS key identification faults. If no faults are present, then most likely the ignition switch is faulty. If there are key identification faults, then it’s either a key, module, or receiver that is the issue. You may want to consult with a mechanic who has the equipment to read out the Powertrain and EWS fault memories before replacing parts.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Key does not turn and steering wheel locked.

The first thing I would recommend is to try turning the wheel and the key at the same time. Sometimes it is possible for the steering lock to bind the ignition cylinder. Turning the wheel away from the lock can...

Q: im planning to buy a certified pre owned BMW x3 si 2009, i would like to know what is the cost for maintenance, like routines thin

Hi there. We have create a great online tool that details all of the scheduled maintenance and repairs for most vehicles sold in the United States. You can look up your particular vehicle's details by clicking this link. From there,...

Q: After diagnosis of no problems, car won't start properly

The key light coming on means that the vehicle is not recognizing your key. The light illumination comes in conjunction with a numeric code, which will specify the reason the key light illuminates. It is possible that you have a broken antenna...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...