2021 Audi A6 Service and Repair Manual

This 2021 Audi A6 factory service and repair manual is built around the Select sedan trim, so the procedures, wiring routes, and torque values you pull are the ones Audi documented for this configuration rather than a generic sedan-family approximation.

This year's lineup covers multiple engines, and the manual's engine section is written to match whichever one is under your hood:

• 2.0L turbocharged inline-four mild-hybrid (engine code DPAA)
• 2.0L turbocharged inline-four mild-hybrid (engine code VIN 8, DLHB)
• 3.0L turbocharged V6 mild-hybrid (engine code DLZA)

Engines covered

• 2.0L inline-four (121 cu in) — DOHC, turbocharged, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Select

Known issues on the 2021 A6. Eleven recalls are on federal record for this model year. Rear seat belt automatic locking retractors can deactivate early, preventing a child restraint system from securing properly. A rear axle alignment check tied to an earlier recall repair may have been skipped, allowing premature or uneven tire wear. A misprinted score line on the passenger air bag could keep it from deploying correctly and eject plastic debris into the cabin. A connector can detach from the front door crash sensors, delaying air bag and seat-belt pretensioner activation in a side impact. A rear-axle trailing arm lock nut can break from stress corrosion and misalign the axle. A sticking fuel level sender can display an inaccurate reading and lead to an unexpected engine stall. A software issue can leave the rearview camera display blank in reverse. Liquid intrusion at the rear seat can shut down the gateway control module and suddenly cut engine power. An incorrectly labeled cap may have allowed the wrong brake fluid type to be installed, reducing braking ability. A software error can knock out the instrument panel display, hiding the speedometer and warning lights. A separate software error can also drop the rearview camera image entirely. Owners have filed 15 complaints for the year. The factory diagnostic and repair procedures behind each of those systems are here.

From tracing a gateway module shutdown to verifying rear axle alignment or a brake fluid service, it keeps you on the OEM procedure and the correct specification for your specific 2021 A6.