WenmarOpen by Wenmar Pro

Service bulletin TSB-42-11-08

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10042393
Published by NHTSA2011-12-07
Manufacturer's numberTSB-42-11-08
Manufacturer's date2011-10-05
NHTSA componentPOWER TRAIN:DRIVELINE:DRIVESHAFT; POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT

NHTSA's summary

AUDI: CERTAIN VEHICLES WITH AXLE SHAFT INBOARD FLANGE OR SPORT DIFFERENTIAL SIDE FLANGE WILL EXPERIENCE AN OIL LEAK IN THOSE AREA. MODELS S4, S5, S5 CABRIOLET. *PE

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Axle, Differential, Driveshaft

Vehicles listed
AUDI S42010, 2011
AUDI S52010, 2011

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
A421214 2026049-2017-11-08. Service bulletin. Supersedes Technical Service Bulletin Group 42 number 12 ? 13 dated September 5, 2012. Oil leak in the area of the Quattro sports rear differential (PR-PDU, PDR, or GH2) side flange, or axle shaft inboard flange. Insufficient sealant on the protective cap on the inboard constant velocity joint at the rear differential on vehicle with a sports differential. Optimized use of sealer in production from 07/10/2011.
A421524 2026049-2017-10-27. Service bulletin. Supersedes Technical Service Bulletin Group 42 number 13-17 dated March 18, 2013. Oil is leaking in the area of the Quattro sports rear differential (PR-PDU, PDR, or GH2) side flange or axle shaft inboard flange. Insufficient sealant on the protective cap on the inboard constant velocity joint at the rear differential on vehicles with a sports differential.
SB-2026049/72016-05-09. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
SB-2026049/62016-05-09. Service bulletin. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
TSB-42-15-242015-10-14. Service bulletin. AUDI: ON SOME VEHICLES, THE REAR DIFFERENTIAL SIDE FLANGE OR AXLE SHAFT INBOARD FLANGE IS LEAKING OIL FROM QUATTRO SPORTS AND PROTECTIVE CAP HAS INSUFFICIENT SEALANT ON INBOARD CONSTANT VELOCITY JOINT NEAR REAR DIFFERENTIAL. MODEL 2010-12 S4, 5, CABRIOLET. *PE
TSB-42-12-132012-11-06. Service bulletin. AUDI: THE AXLE SHAFT INBOARD FLANGE AND QUATTRO SPORTS REAR DIFFERENTIAL (PR-PDU, PDR, OR GH2) SIDE FLANGE HAS AN OIL LEAKAGE. MODELS 2010-2012 S4, S5, S5 CABRIOLET. *PE UPDATED 04/16/2013 *JS
TSB-42-12-112012-09-06. Service bulletin. AUDI: CONSTANT VELOCITY OF JOINT GREASE AT REAR DIFFERENTIAL, CAUSES AN OIL LEAKAGE IN AREA OF QUATTRO SPORTS REAR DIFFERENTIAL SIDE FLANGE, OR AXLE SHAFT INBOARD FLANGE, DUE TO INSUFFICIENT SEALANT ON PROTECTIVE CAP. *PE
TSB-42-11-092011-12-07. Service bulletin. AUDI: VEHICLES WITH QUATTRO SPORTS REAR DIFFERENTIAL LEAKS AT THE REAR AXLE SHAFT SIDE FLANGE OR INBOARD FLANGE. MODELS S4, S5. *PE