SMG playing up - M3 (Std non CSL)

adem.csl · 08-07-2017, 05:43 PM

Check to see if one side of the bonnet is Unlatched
If the bonnet is not completely shut and you hit a bump it may be the bonnet sensor mite pick up the bonnets not completely closed and drop it into neutral.possibility I've had it on 3 customer cars last week where they check their fluids and not shut Bonnet properly then come in saying it drops outta gear.
Does the selected gear number flash while driving?

Chad · 08-07-2017, 07:20 PM

Definitely check bonnet switches,as Aden says they can play up, rule out parts that cost the least first before you commit to spending hard earned cash, worn or broken compression spring, I've found usually bring on cog light and no drive,... spring pushes on locking pin, holding selector shaft in correct position, selector shaft ..sends / holds gps in correct position for selected gear, if out of sink cog light on,no drive .

adem.csl · 08-07-2017, 11:27 PM

Does the cog light even come on?if it doesn't it's not nesseccarily an smg fault.

08-07-2017, 05:43 PM	#1
adem.csl S5, Sport On, DSC M-track Join Date: Sep 2012 Location: north london Posts: 1,012 Casino cash: $7218	Check to see if one side of the bonnet is Unlatched If the bonnet is not completely shut and you hit a bump it may be the bonnet sensor mite pick up the bonnets not completely closed and drop it into neutral.possibility I've had it on 3 customer cars last week where they check their fluids and not shut Bonnet properly then come in saying it drops outta gear. Does the selected gear number flash while driving? __________________ Bmw in the blood!!

08-07-2017, 07:20 PM	#2
Chad S5, Sport Off, DSC M-track Join Date: May 2015 Location: Cheshire Posts: 631 Casino cash: $7782	Definitely check bonnet switches,as Aden says they can play up, rule out parts that cost the least first before you commit to spending hard earned cash, worn or broken compression spring, I've found usually bring on cog light and no drive,... spring pushes on locking pin, holding selector shaft in correct position, selector shaft ..sends / holds gps in correct position for selected gear, if out of sink cog light on,no drive . Last edited by Chad; 28-10-2017 at 10:16 PM.

08-07-2017, 11:27 PM	#3
adem.csl S5, Sport On, DSC M-track Join Date: Sep 2012 Location: north london Posts: 1,012 Casino cash: $7218	Does the cog light even come on?if it doesn't it's not nesseccarily an smg fault. __________________ Bmw in the blood!!