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Steve, BMW Expert
Category: BMW
Satisfied Customers: 25411
Experience:  BMW Expert
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Hello I have fast flickering indicator lights on my 2007 120D

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Hello I have fast flickering indicator lights on my 2007 120D and a yellow bulb with exclamation mark showing as fault symbol on dash display. All bulbs working fine and hazard lights work at normal speed.
No idea how to proceed. Can you help please.
what checks have been made?
Customer: replied 4 years ago.
All bulbs have been checked and diagnostic machines plugged in to get error codes that show "open circuits"
have bulbs been replaced?
Customer: replied 4 years ago.
Not sure. One fitter said he'd changed a bulb. The other suggested all bulbs might need to be changed but I don't think they had been. But all bulbs are currently working

the first thing to do would be to replace all turn indicator bulbs with new, proper bulbs from a dealer. it sounds foolish to buy bulbs from a dealer, but it can make a difference.


if the problem persists, then there has to be either some kind of resistance issue in the circuit's wiring, or a problem with the control module which controls lighting. if you drive for a long time with a short in a lighting circuit, it can actually lead to the need to replace the control unit


one other thing to try, which is worth a mention, is to unhook the car battery for an hour, this will reset everything and can clear out weird glitches - I would start with this, then replace bulbs, actually.


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