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carlm5 · 17-10-2010, 11:48 AM

I've had some pretty good results with this so I thought I'd share my experiences... I dare say this is old news to most of you.

A couple of years back the smg was missing gears and dropping into neutral, the problem got worse over time until I couldn't select any gear at all. So I called BMW service, they diagnosed the problem, over the phone, and suggested some fairly expensive repair, about Â£1400 plus if I remember correctly. Anyway, a friend of mine suggested I switch out the smg relay at a cost of about Â£5.. problem fixed

I was pleased.

About a year later the car refused to start, I had to turn the key multiple times or hold it in the on position for a few minutes to get the car started.. as you can imagine this was a pain in the butt. The problem got progressively worse, BMW suggested a new starter motor. I thought I'd try switching the relay again... problem fixed, I was pleased. From this point on I always carried a spare in the car.

This morning gearbox was stuck in gear... stuck fast at first but I managed to coax it into reverse, couldn't select neutral though so couldn't start the car. Changed the relay and it started straight away... I'm a big fan of this relay. It seems to have a short life span and is definitely affected by cold damp conditions, but every time something scary goes wrong a new one seems to fix it.

I wonder if anyone else has had the same experience...??

Carl

17-10-2010, 11:48 AM	#1
carlm5 Wonky 'L' after Washing Join Date: Nov 2009 Location: west sussex Posts: 12 Casino cash: $1075	smg quick 'fix' I've had some pretty good results with this so I thought I'd share my experiences... I dare say this is old news to most of you. A couple of years back the smg was missing gears and dropping into neutral, the problem got worse over time until I couldn't select any gear at all. So I called BMW service, they diagnosed the problem, over the phone, and suggested some fairly expensive repair, about Â£1400 plus if I remember correctly. Anyway, a friend of mine suggested I switch out the smg relay at a cost of about Â£5.. problem fixed I was pleased. About a year later the car refused to start, I had to turn the key multiple times or hold it in the on position for a few minutes to get the car started.. as you can imagine this was a pain in the butt. The problem got progressively worse, BMW suggested a new starter motor. I thought I'd try switching the relay again... problem fixed, I was pleased. From this point on I always carried a spare in the car. This morning gearbox was stuck in gear... stuck fast at first but I managed to coax it into reverse, couldn't select neutral though so couldn't start the car. Changed the relay and it started straight away... I'm a big fan of this relay. It seems to have a short life span and is definitely affected by cold damp conditions, but every time something scary goes wrong a new one seems to fix it. I wonder if anyone else has had the same experience...?? Carl Last edited by carlm5; 17-10-2010 at 11:54 AM.