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Service bulletins for the 2018 Audi Q5

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1091 on file from NHTSA, as of 2026-10-19.

About B146C on the 2018 Audi Q5: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: B146C are shown. Show all

Bulletins, newest first
A9423682070694_12023-12-07. Service bulletin. ELECTRICAL SYSTEM:INTERIOR LAMPS/BULBS; UNKNOWN OR OTHER. This bulletin provides information when there is a functional issue with switching of lights in the rear lid. DTC B146C29.
A9421472050234_52021-10-06. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM. This bulletin contains repair instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.
A9420242050234_42020-05-07. Service bulletin. EXTERIOR LIGHTING. This bulletin contains repair instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.
A941902 2050234-2019-04-15. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM. This bulletin contains repair instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.
A941902 2050234-2019-04-08. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains repair instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.
A941902 2050234-2019-04-01. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; EXTERIOR LIGHTING. This bulletin contains repair instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.
A941800 2050234-2018-10-15. Service bulletin. EXTERIOR LIGHTING:BRAKE LIGHTS; ELECTRICAL SYSTEM; STRUCTURE:BODY:BUMPERS. This bulletin contains instructions regarding when the rear lights do not switch from bumper to hatchgate after closing with DTC B146C29.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.