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Service bulletins for the 2018 Audi A4

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Suspension are shown. Show all

Bulletins, newest first
A4222482038689_62022-04-05. Service bulletin. SUSPENSION. This bulletin contains information on how to fix a clunking or rattling noise heard from the rear suspension when the vehicle is driven over bumps.
A4022342018194102022-04-05. Service bulletin. SUSPENSION. This informational bulletin contains knowledge on why oil may appear on one or several of the shock absorbers.
A4022322059474_32022-02-04. Service bulletin. SUSPENSION:FRONT:SHOCK ABSORBER. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A4421862056386_72022-01-05. Service bulletin. STEERING; SUSPENSION. This bulletin contains instructions for when the vehicle pulls to one side or the steering wheel is crooked.
A4321562051336_52021-10-05. Service bulletin. SUSPENSION. This bulletin contains repair instructions for DTC B200FF0.
A4221462038689_52021-09-02. Service bulletin. SUSPENSION. This bulletin contains information on how to fix a clunking or rattling noise heard from the rear suspension when the vehicle is driven over bumps.
A4221462038689_52021-08-04. Service bulletin. EQUIPMENT; SUSPENSION:REAR. This bulletin contains information on how to fix a clunking or rattling noise heard from the rear suspension when the vehicle is driven over bumps.
A4321482059665_22021-07-02. Service bulletin. SUSPENSION; ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains a software update that corrects the control module configuration and addresses a warning light.
A4321462051336_32021-05-06. Service bulletin. SUSPENSION; ELECTRICAL SYSTEM. This bulletin contains repair instructions for DTC B200FF0.
A3921402059057_32021-03-04. Service bulletin. WHEELS; SUSPENSION. This bulletin contains repair instructions for noises when in reverse or vibrations/humming/droning or rubbing when fully turning the wheel.
A4020142060855_12020-11-05. Service bulletin. SUSPENSION; EQUIPMENT. This bulletin contain repair instructions for rumbling noises from the suspension - upper link rubber mounting.
A4020132059474_22020-08-06. Service bulletin. SUSPENSION:FRONT:SHOCK ABSORBER; EQUIPMENT. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A4020122047920_52020-08-06. Service bulletin. SUSPENSION:FRONT:WHEEL BEARING; STEERING. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds.
A4320372059665_12020-07-07. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; SUSPENSION. This bulletin contains a software update that corrects the control module configuration and addresses a warning light.
A4020072047920_42020-06-04. Service bulletin. STEERING; SUSPENSION; EQUIPMENT:MECHANICAL. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds.
A4220442038689_42020-06-04. Service bulletin. EQUIPMENT; SUSPENSION. This bulletin contains information on how to fix a clunking or rattling noise heard from the rear suspension when the vehicle is driven over bumps.
A4020062059474_12020-06-04. Service bulletin. EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; SUSPENSION. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
A4020042047920_32020-06-04. Service bulletin. SUSPENSION. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds.
A4320322051336_22020-05-07. Service bulletin. SUSPENSION. This bulletin contains repair instructions for DTC B200FF0.
A4220422058459_12020-03-05. Service bulletin. SUSPENSION:REAR:SHOCK ABSORBER. This bulletin contains instructions when there is creaking noises from the rear of the vehicle from one of the shock absorber mountings.

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