2021 Audi A4 allroad Service and Repair Manual

This 2021 Audi A4 allroad factory service and repair manual is built for this specific year and trim, so the specifications, torque values and diagnostic steps inside match what Audi actually published for your wagon rather than a generic A4 reference. Under the hood is the 2.0L L4 (DPAA), a turbocharged mild hybrid engine, and the manual documents the factory service specs for it.

Engines covered

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

Body styles covered

• 4-door wagon

Trims covered

• Komfort
• Premium
• Premium Plus
• Prestige
• Progressiv
• Technik

Known issues on the 2021 A4 allroad. Four recalls are on federal record for this model year. The first covers the rear seat belt retractors, which may deactivate their automatic locking function early, preventing a child restraint system from securing properly. The second covers the tires, where a rear axle misalignment left uninspected after an earlier axle repair can cause premature or uneven tire wear and raise the risk of a crash. The third covers the rear non-powered axle assembly, where a lock nut on the trailing arm can break due to stress corrosion, misaligning the axle and risking loss of control. The fourth covers the back-over prevention display, where a software issue can leave the rearview camera screen blank in reverse, reducing rear visibility. Owners have filed 11 complaints for the year. The factory diagnostic and repair procedures behind each of those systems are here.

From a rear seat belt inspection to a trailing arm and axle check or confirming rearview camera function, it keeps you on the OEM procedure for your specific 2021 A4 allroad.