The GM5 is found in 3 Series between 1998 and 2005, Z4 between 2002 and 2008, ZE all years and X3 between 2003 and 2010.  
In general they all use the GM5, but, there are many different part numbers. 
This table shows a selection of  part numbers but is not conclusive, there are more, so please call us 01932 800800 if you have a number not represented here.
61353454607 61356944842 61356907660 61356939943 61358385439
61354533550 61356907663 61356932371 61356940067 61358385409
61354533592 61356924250 61356944840 61356963338 61358385538
61354533551 61356932391 61356963026 61356988086 61358385540
61354533552 61356923960 61356963338 61356931707 61359161931
61354101416 61356932369 61356919275 61356939943 61359116445
61356944840 61356932371 61356914367 61356944844
61356963026 61356944840 61356931707 61356963038
61356963338 61356963026 61356932384 61358385541
You could ignore the problem and suffer the intermittent locking, potentially not being able to use the windows and doors and such like but it is so easy, fast and cheap to repair that it doesn’t make any sense to put up with it.
And the BMW GM5 not only controls the locking mechanism but the windscreen wipers, alarms and interior lights so you could find yourself with many more problems. 

Yes you can, if you have the know-how and equipment you can replace the Tyco GM5 Relays C2001-A303 C2002-a403, we can sell you what you need.


We offer a very competitive fast turnaround service see here for full details


Call us for up to date costs and a quote 01932 800800

Send the unit to us - use our fast track service and units will be repaired same day!

See full details of our service here.

If you're local in Surrey give us a call or use our booking form and we will book you in.


Book your BMW in and bring it to us and we’ll do it while you wait, send the GM5 in to us and we aim for a 24 hour turnaround.


If you want to send your GM5 module in to us for a fast repair and return, follow these GM5 removal instructions then follow these instructions for sending the module to us. 


Yes, the car will still run and drive fine without the general module. You will lose a few things like power windows, power door locks, remote keyless entry, remote boot release, interior lights, windscreen wipers and alarm.

So if you need to drive it while using our fast repair service you can for a short time – however without windscreen wipers we wouldn’t recommend it.


Yes, contact us on +44 (0) 1932 800800 to discuss shipping charges.


No it doesn't. When you get the GM5 module back from us all you need to do is plug it in and you're ready to drive again. 


Not finding the answers your looking for? If you have a GM5 related question that is not covered here, give us a call or click here to submit a question for us to answer.

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Cartronics GB, 22 High Road, Byfleet, SURREY, KT14 7QG,
tel: 01932 800800