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Manufacturer recall number

Audi recall 42L1

Audi calls it 42L1. NHTSA filed it as campaign 21V295000 on Apr 26, 2021: suspension on the 2019–2021 Audi A4 and 15 other Audi models, 40,993 vehicles potentially affected. One recall, two numbers — the dealer quotes the manufacturer’s, the federal record carries NHTSA’s.

What NHTSA has under this number

Source: 49 CFR Part 573 filings
NHTSA campaignVehiclesComponentFiledAffectedSeverity
21V2950002019–2021 Audi A4 and 15 other Audi modelsSuspensionApr 26, 202140,993high
Problem Volkswagen Group of America, Inc. (Audi) is recalling certain 2021 Q7, Q8, Q5 Sportback, SQ5 Sportback, RS6 Avant, RS7, RS Q8, 2020-2021 Audi S6 sedan, Q5, A8, S8, A7, A6 Allroad, A5 Cabriolet, A4 sedan, A4 Allroad, SQ5, S7, A6 sedan, S5 coupe, S4 sedan, S5 Cabriolet, A5 coupe, 2019-2021 RS5 coupe, A5 Sportback, S5 Sportback, RS5 Sportback vehicles. The lock nut on the trailing arm of the rear axle may break due to stress corrosion. Risk A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash. Fix Dealers will replace the lock nuts and, if necessary, the associated bolts, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 42L1.

The manufacturer’s own words as filed for 21V295000. Every model year it covers, the build window and the filed PDFs →

Two numbers, one recall

Every safety recall carries two identifiers. 42L1 is the number Audi assigned in its own system: it is what appears on the owner letter, on the dealer’s service screen and on the repair order. 21V295000 is the number NHTSA filed the same recall under when the manufacturer reported it, and it is the one every federal record, this site included, is keyed on.

The repair is free by federal law for vehicles up to fifteen years old. Whether one particular vehicle is included is settled by its VIN against the manufacturer’s build list, not by its model year.

Check one specific vehicle

Both lookups check a VIN against the manufacturer’s own list and say whether the repair is still outstanding on that vehicle.

Common questions

Source: NHTSA, 49 CFR Part 573

Is 42L1 the same recall as 21V295000?

Yes. 42L1 is Audi’s own number for it; 21V295000 is NHTSA’s. One recall, two references.

Which vehicles does 42L1 cover?

2019–2021 Audi A4 and 15 other Audi models, 40,993 vehicles by the manufacturer’s count. A recall covers a build range, so the VIN decides whether one particular vehicle is in it.

Does the 42L1 repair cost anything?

No. The manufacturer must remedy a safety defect at no charge for vehicles up to 15 years old from first sale.