Safety Recall 42L1 / Rear Axle Trailing Arm Lock Nut – 2020-2021 Audi

April 26, 2021 NHTSA CAMPAIGN NUMBER: 21V295000

Rear Axle Lock Nuts May Break

A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.

 

NHTSA Campaign Number: 21V295

Manufacturer Volkswagen Group of America, Inc.

Components 

Potential Number of Units Affected 40,993

 

Summary

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.

 

Remedy

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.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

 

Check if your Audi has a Recall

 


Issue:

Due to stress corrosion cracking on lock nuts of particular production batches, the nut of the excentric bolt on the trailing arm of the rear axle may break which may cause alterations in the wheel alignment of the rear axle. This could be noticed by a steering wheel misalignment when driving straight ahead or by the vehicle pulling to one side when braking or accelerating. It cannot be ruled out that the rear axle could suddenly and uncontrollably move in the wrong direction at higher speeds. This can lead to a loss of vehicle control and a crash without warning.

 

Precautions

If this condition is present in the vehicle, the driver may notice a steering wheel misalignment when driving straight ahead or the vehicle pulling to one side when braking or accelerating.

Should this occur, owners are advised to contact an authorized Audi dealer without delay and make arrangements to have the vehicle inspected/repaired.

 

Repair:

REPAIR AVAILABLE – May 28, 2021 – REPAIR DESCRIPTION

See ELSA/ServiceNet for complete repair & claiming instructions

Check daily campaign open inventory report or OMD for affected vehicles in inventory

Repair every affected inventory vehicle before delivery to consumers.

 

Affected Vehicles

Country Beginning Model Year Ending Model Year Vehicle Vehicle Count
USA 2020 2021 A4 ALLROAD 442
USA 2020 2021 A4 SEDAN 5,097
USA 2020 2021 A5 CABRIOLET 433
USA 2020 2021 A5 COUPE 469
USA 2019 2021 A5 SPORTBACK 2,148
USA 2020 2021 A6 ALLROAD 371
USA 2020 2021 A6 SEDAN 2,760
USA 2020 2021 A7 254
USA 2020 2021 A8 282
USA 2020 2021 Q5 19,246
USA 2021 2021 Q5 SPORTBACK 3
USA 2021 2021 Q7 2,727
USA 2021 2021 Q8 1,156
USA 2019 2021 RS5 COUPE 76
USA 2019 2021 RS5 SPORTBACK 157
USA 2021 2021 RS6 AVANT 176
USA 2021 2021 RS7 270
USA 2021 2021 RS Q8 116
USA 2020 2021 S4 SEDAN 498
USA 2020 2021 S5 CABRIOLET 142
USA 2020 2021 S5 COUPE 129
USA 2019 2021 S5 SPORTBACK 839
USA 2020 2021 S6 SEDAN 293
USA 2020 2021 S7 167
USA 2020 2021 S8 90
USA 2020 2021 SQ5 2,649
USA 2021 2021 SQ5 SPORTBACK 3
CAN 2020 2021 A4 ALLROAD 62
CAN 2020 2021 A4 SEDAN 842
CAN 2020 2020 A5 CABRIOLET 24
CAN 2020 2020 A5 COUPE 52
CAN 2019 2021 A5 SPORTBACK 403
CAN 2020 2021 A6 ALLROAD 28
CAN 2020 2021 A6 SEDAN 44
CAN 2020 2021 A7 18
CAN 2020 2021 A8 5
CAN 2020 2021 Q5 2,745
CAN 2021 2021 Q5 SPORTBACK 1
CAN 2021 2021 Q7 132
CAN 2021 2021 Q8 113
CAN 2019 2021 RS5 COUPE 21
CAN 2021 2021 RS5 SPORTBACK 10
CAN 2021 2021 RS6 AVANT 37
CAN 2021 2021 RS7 23
CAN 2021 2021 RS Q8 41
CAN 2020 2021 S4 SEDAN 85
CAN 2020 2021 S5 CABRIOLET 20
CAN 2020 2021 S5 COUPE 75
CAN 2020 2021 S5 SPORTBACK 265
CAN 2020 2021 S6 SEDAN 23
CAN 2020 2021 S7 12
CAN 2020 2021 S8 8
CAN 2020 2021 SQ5 306
CAN 2021 2021 SQ5 SPORTBACK 1

 

Problem Description

Due to stress corrosion cracking on lock nuts of particular production batches, the nut of the eccentric bolt on the trailing arm of the rear axle may break which may cause alterations in the wheel alignment of the rear axle. This could be noticed by a steering wheel misalignment when driving straight ahead or by the vehicle pulling to one side when braking or accelerating.

It cannot be ruled out that the rear axle could suddenly and uncontrollably move in the wrong direction at higher speeds. This can lead to a loss of vehicle control and a crash without warning.

 

Corrective Action

The affected lock nut will be replaced. If the screw connection is already damaged, it will be replaced completely.

 

Precautions

If this condition is present in the vehicle, the driver may notice a steering wheel misalignment when driving straight ahead or the vehicle pulling to one side when braking or accelerating. Should this occur, owners are advised to contact an authorized Audi dealer without delay and make arrangements to have the vehicle inspected/repaired.

 

Code Visibility

On or about May 28, 2021, the campaign code was applied to affected vehicles.

 

Owner  Notification

Owner notification will take place in June 2021. Owner letter examples are included in this bulletin for your reference.

 

Repair Overview

A4 and A5 variants: Replace left and right control arm nuts at the connection to the subframe.

All other models: Replace left and right control arm nuts at the subframe and at the wheel bearing housing.

 


 

 


36 Affected Products

Vehicles

MAKE MODEL YEAR
AUDI A4 2020-2021
AUDI A5 2019-2021
AUDI A6 2020-2021
AUDI A7 2020-2021
AUDI A8 2020-2021
AUDI Q5 2020-2021
AUDI Q7 2021
AUDI Q8 2021
AUDI RS Q8 2021
AUDI RS5 2019-2021
AUDI RS6 2021
AUDI RS7 2021
AUDI S4 2020-2021
AUDI S5 2019-2021
AUDI S5 CABRIOLET 2020-2021
AUDI S6 2020-2021
AUDI S7 2020-2021
AUDI S8 2020-2021
AUDI SQ5 2020-2021

 


16 Associated Documents

Remedy Instructions and TSB

RCRIT-21V295-6955.pdf 1885.402KB

RCRIT-21V295-6955

 


Defect Notice 573 Report

RCLRPT-21V295-6898.PDF 229.445KB

RCLRPT-21V295-6898

 


Recall Acknowledgement

RCAK-21V295-1320.pdf 701.478KB

RCAK-21V295-1320

 


Manufacturer Notices(to Dealers,etc) – AUDI Date: May 28, 2021 Repair Available Safety Recall 42L1 / Rear Axle Trailing Arm Lock Nut

RCMN-21V295-1303.pdf 723.367KB

RCMN-21V295-1303

 


Remedy Instructions and TSB

RCRIT-21V295-3014.pdf 1770.126KB

RCRIT-21V295-3014

 


Manufacturer Notices(to Dealers,etc) – AUDI Date: May 28, 2021 Repair Available Safety Recall 42L1 / Rear Axle Trailing Arm Lock Nut

RCMN-21V295-8789.pdf 212.272KB

RCMN-21V295-8789

 


Recall Quarterly Report #1, 2021-2

RCLQRT-21V295-9233.PDF 211.147KB

RCLQRT-21V295-9233

 


ISSUED Owner Notification Letter(Part 577) – 42L1_Audi Customer PRI

RCONL-21V295-8848.pdf 156.778KB

RCONL-21V295-8848

 


ISSUED Owner Notification Letter(Part 577) – 42L1_Audi Customer

RCONL-21V295-3717.pdf 140.733KB

RCONL-21V295-3717

 


Date June 17, 2021 42L1 Campaign Tip Wind Deflector Pins

RMISC-21V295-7405.pdf 349.244KB

RMISC-21V295-7405

 


Remedy Instructions and TSB

RCRIT-21V295-1860.pdf 1770.028KB

RCRIT-21V295-1860

 


Manufacturer Notices(to Dealers,etc) – AUDI Date: May 04, 2021 Advance Notice Safety Recall 42L1 / Rear Axle Trailing Arm Lock Nut

RCMN-21V295-1684.pdf 719.42KB

RCMN-21V295-1684

 


Remedy Instructions and TSB

RCRIT-21V295-1559.pdf 1420.178KB

RCRIT-21V295-1559

 


Remedy Instructions and TSB

RCRIT-21V295-4001.pdf 1423.326KB

RCRIT-21V295-4001

 


Recall Quarterly Report #2, 2021-3

RCLQRT-21V295-4862.PDF 211.25KB

RCLQRT-21V295-4862

 


Recall Quarterly Report #3, 2021-4

RCLQRT-21V295-8518.PDF 211.335KB

RCLQRT-21V295-8518

 


Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=21V295&docType=RCL

 


 

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