4 recalls across 4 model years
The Audi 4000 has 4 recalls spanning the 1980–1986 production run, with the most serious being a brake caliper defect on 1981 models where porous spots in the caliper's threaded hose fitting allow brake fluid to seep out under heavy braking, gradually lowering fluid level in the reservoir until complete brake failure becomes possible.
On 1986 models, rear seat belt buckles can appear fully latched but fail to lock securely, releasing the occupant during a hard stop or collision. The 1980 model year has a rear trunk side member that may not have been fully welded, and in a rear-end collision the member can break free and puncture the fuel tank, causing fuel to leak. On 1985 models equipped with automatic transmissions, the idle stabilizer valve can wear and produce rough, fluctuating idle that worsens over time and degrades driveability.
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