2005 Audi S4 Engine cooling Problems
- Complaints
- 3about this part
- Share
- 7%of 43 total for the year
- Median mileage
- 70,600miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2005 Audi S4, 7% of the 43 complaints for this model year. Where a mileage was given, the median is 70,600 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Car started misfiring and within less than 5 miles in the highway then started to build up smoke inside the cabin, car then stopped and towed to a mechanics who confirm the diagnosis of misfiring of 3 cylinders and found overheating of the passenger side catalytic converter that lead to a melting a connector of the transmission.”
NHTSA complaint #10345903, filed 2010-07, 70,600 milesRelated service bulletins
- 10181059Oct 5, 2020This bulletin contains instructions for using the UV additive to find engine oil leaks.
- 10176873Jun 25, 2020This bulletin contains instructions for identifying and mixing factory fill coolants.
- 10123764Sep 8, 2015Supersedes Technical Service Bulletin Group 19 number 15-61 dated July 7, 2015. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have been…
- 10128399Jul 7, 2015Supersedes Technical Service Bulletin Group 19 number 14-50 dated June 20, 2014. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have…
- 10119945Mar 17, 2015Supersedes Technical Service Bulletin Group 10 number 13-10 dated September 5, 2013. Prior to engine replacement, any debris lodged in transferred assemblies must be removed. If…
- 10119946Mar 6, 2015Supersedes Technical Service Bulletin Group 17 number 13-35 dated January 9, 2013. This bulletin lists engine oils that meet Audi oil quality standards (VW 501 01, 502 00, 505…
- 10120682Feb 13, 2015Supersedes Technical Service Bulletin Group 01 number 13-69 dated February 14, 2013. Noises and inconsistent engine operation after cold start during the catalyst heating phase…
- 10231130Jun 30, 2014Idenifying and mixing factory fill engine coolants
- 10122415Jun 20, 2014Supersedes Technical Service Bulletin Group 19 number 13-41 dated June 20, 2013. Discontinuation and mixing of Audi-approved engine coolants. G11, G12, and G12+ coolants have…
- 10210680Jun 3, 2014As the sump pan gasket settles, the torque of the bolts decreases and the seal may leak. Automatic transmission fluid is leaking at the sump pan gasket.
Engine cooling: other model years
Other parts of the 2005 Audi S4
33 complaintsElectrical system
5 complaintsAir bags
4 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsBrakes
1 complaintsEngine
1 complaintsFuel system
1 complaintsSeats
1 complaintsSteering
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2005 Audi S4
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology