Q7 rear bulb carrier - crazy money
Discussion
So my Q7 has a failed rear bulb carrier in the upper light section - quite a common issue seemingly and wondered if anyone knew if they were common across any other audi/vag vehicles as they're all coming in at c.£55 at the moment for about 12inches of cable and a couple of connectors
I believe the part # is 4L0945221B
I believe the part # is 4L0945221B
What was the symptoms of this as I have just had rear left light and brake light fail at the same time? . The rear left light is made up of 2 lights and the outside one is still working but the inside one isn't. I'm assuming there are 2 separate bulbs rather than a dual filament one?
Yes it’s the inner ones.
However it transpires my problem was not the bulb holder loom at all - as the same problem re-emerged 48hrs later ... transpires it’s actually the bulbs that’s the issue
All MDCs (incl ECP/GSF/Indy/Halfords) sell P21w bulbs as expected but most are actually a sub-variant which retailers either don’t know or don’t care about. Bosch, Neolux, etc... are all the latter ‘other’ type!
P21w are split into 2 types, 7506 and 1156 - visually identical but actually different - nowhere seems to take account of this, I only found out via a US Audi Q7 owners club.
So I have now replaced the offending bulb with an Osram P21W ultra life 7506 and it immediately cured the issue - so I would try this first as they’re only £4 a pair from ECP
However it transpires my problem was not the bulb holder loom at all - as the same problem re-emerged 48hrs later ... transpires it’s actually the bulbs that’s the issue
All MDCs (incl ECP/GSF/Indy/Halfords) sell P21w bulbs as expected but most are actually a sub-variant which retailers either don’t know or don’t care about. Bosch, Neolux, etc... are all the latter ‘other’ type!
P21w are split into 2 types, 7506 and 1156 - visually identical but actually different - nowhere seems to take account of this, I only found out via a US Audi Q7 owners club.
So I have now replaced the offending bulb with an Osram P21W ultra life 7506 and it immediately cured the issue - so I would try this first as they’re only £4 a pair from ECP
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