Picture of full key set that came with my 1998 M Coupe,
After buying a new key from my dealers it turns out that they need to be programmed to the car this is done by,
1, Insert new key into ignition and turn until dash warning lights come on (whilst sat in car with windows and doors closed)
2. Remove key from ignition and press unlock button
3. Whilst still depressing unlock button press lock button three times
4. Release unlock button and interior light will illuminate and doors will lock/unlock to confirm key is programmed to car.
5. If you have more than one remote key you will need to carry out stages 3 & 4 for each key within 10 seconds of each other
After buying a new key from my dealers it turns out that they need to be programmed to the car this is done by,
1, Insert new key into ignition and turn until dash warning lights come on (whilst sat in car with windows and doors closed)
2. Remove key from ignition and press unlock button
3. Whilst still depressing unlock button press lock button three times
4. Release unlock button and interior light will illuminate and doors will lock/unlock to confirm key is programmed to car.
5. If you have more than one remote key you will need to carry out stages 3 & 4 for each key within 10 seconds of each other
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