Complaints over time
Complaints about the 2015 Audi S4 peaked in 2023, with 1 filed
Owner complaints about this model year, by the year they were filed with NHTSA.
Source: NHTSA ODI complaints file. The lighter column runs through October.
Model year
2015 Audi S4
Sedan, gasoline, AWD/All-Wheel Drive, built in Germany. Owner complaints on file from Jan 13, 2023 to Jan 13, 2023.
Recall campaigns covering this model year0102k vehicles or units across those campaigns
Owner complaints1Below the median 2015 sedan
Severity index0.02015 sedans average 7.9
First 24 months0Complaints in its first two years
Components
100% of complaints about the 2015 Audi S4 name engine and cooling
Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.
Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls
No recall campaign lists the 2015 Audi S4
Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.
Source: NHTSA ODI recalls file.
Owner complaints
What owners reported about the 2015 Audi S4
The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.
1 complaint on file, page 1 of 1.
- Filed Jan 13, 2023Failure Jan 9, 2023Inver Grove Heights, MNEngine
The R&R valve/oil separator unit failed on my 2015 Audi S4 at approximately 71,000 miles. This unit, when fails, can mix the oil and anti-freeze which can seize the engine. I was able to catch the problem before engine failure. Minneapolis Audi repaired the vehicle this week, 1/10/23. There were NO warning indicators except noise. Various media sources have stated that this is a known engine failure concern between 60-90K miles for this engine. Audi does not recognize this as a safety or warranty concern.
NHTSA complaint 11501592
Source: NHTSA ODI complaints file.
Investigations
NHTSA has not opened an investigation on this model year
Source: NHTSA ODI investigations file.
Service bulletins
683 manufacturer communications cover this model year
Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.
- TSB_2079732_2 Aug 11, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when there is a paint issue on alloy wheels. - TSB_2076945_2 Aug 20, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information about leather care and seat repair. - TSB_2075120_3 Aug 11, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information about the general approach for brake vibration concerns. - TSB_2074436_3 Aug 26, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when the horn sound quality is poor. - TSB_20741717_15 Aug 11, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information on the GFF test plan required for AC compressor replacements regardless of the concern. - TSB_2072304_4 Aug 11, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when there is an ABS/ESC speed sensor implausible signal. - TSB_2069904_3 Aug 21, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information for all models regarding brake sounds. - TSB_2069078_4 Aug 21, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only). - TSB_2067132_4 Aug 21, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when there is corrosion on the friction survace of steel brake discs. - TSB_2082846_1 Jul 27, 2026 · Service Bulletin/Repair Instructions
This bulletin provides a statement regarding the bottleneck of supply for VW approved oil types VW 504.00 and VW 507.00. - TSB_2073747_4 Jul 9, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informatoinw hent here are scratches or a coating on the cover of the instrument cluster, or particles inside of the housing. - TSB_2073282_1 Jul 9, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when there is a film/visible rings on the clear glass cover of the headlight when the dipped beam is switched on. - TSB_2082323_1 Jun 10, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiton when the engine is not running smoothly, misfiring. - TSB_2074640_3 Jun 26, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km. - TSB_2059335_7 Jun 23, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when there are noises from the area around the instrument cluster. - TSB_2052680_6 Jun 4, 2026 · Service Bulletin/Repair Instructions
This Reporting Obligation requires technicains to contact the Technical Assistance Center (TAC) in cases where the airbag/seatbelt is deployed/not deployed; general accident information; and fire and overheat damage. - TSB_2028902_5 Jun 23, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiton when the transmission warning message appears in the cluster; P074100 stored in the TCM. - TSB_2074729_3 Jun 23, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informationwhen noises/vibration are detected from front of vehicle in dynamic mode. - TSB_2080517_4 May 22, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn when the starter battery is discharged or defective. - TSB_2074808_4 May 6, 2026 · Service Bulletin/Repair Instructions
The high-voltage batteries in electric vehicles are subject to various ageing effects which could lead to the energy content (energy density) being reduced. This reduction in the energy content, which is due to factors. Revised header. Added Model years - AOS-26-25 May 26, 2026 · Service Bulletin/Repair Instructions
This is a notice for software changes with the ODIS diagnostic program to correct the communication during vehicle programming function: A software fix is needed to correct the issue: The ODIS Audi Brand update 2.41.1 is setting a ODS5003E error code when … - TSB_2080517_3 Apr 30, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn when the starter battery is discharged or defective. - TSB_2070568_6 Apr 22, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information about professional noise analysis with the VAS 611 015 PICO-NVH tool - TSB_2022032_12 Apr 30, 2026 · Service Bulletin/Repair Instructions
This bulletin provides diagnostic information for the vehicle locking system. - TSB_2081531_1 Mar 27, 2026 · Service Bulletin/Repair Instructions
This Reporting obligation requests that technicians contact the Technical Assistance Center (TAC) when the diagnostic tester refers to this reportin gobligation or to TPI 2033392. - TSB_2081409_1 Mar 26, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiton regarding the Universal Traffic Recorder. - TSB_2081405_1 Mar 20, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn about various infortainment system complaints. - TSB_2051095_11 Mar 13, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information about where to download the Audi frequency app. - TSB_2024323_13 Mar 17, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when the parking assistance gives false warnings. - TSB_2024323_12 Mar 2, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when the parking assistance gives false warnings. - TSB_2023187_8 Mar 24, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn regarding squeaking noises when steering or maneuvering. - DC_Audi_CF_ Airbag Mar 2, 2026 · Other
The National Highway Traffic Safety Administration (NHTSA) has issued an urgent warning regarding counterfeit replacement airbag inflators that are being installed in used vehicles. - TSB_2080517_2 Feb 17, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn when the starter battery is discharged or defective. - TSB_2059335_6 Feb 17, 2026 · Service Bulletin/Repair Instructions
This TSB provides information when there are noises from the area around the instrument cluster. - TSB_2052680_4 Feb 12, 2026 · Service Bulletin/Repair Instructions
This Reporting Obligation requires technicains to contact the Technical Assistance Center (TAC) in cases where the airbag/seatbelt is deployed/not deployed; general accident information; and fire and overheat damage. - TSB_2051095_10 Feb 20, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded. - TSB_2021205_10 Feb 20, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures. - TSB_2080681_1 Jan 21, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information regarding contact checks for event memories, intermittent. - TSB_2080329_1 Jan 22, 2026 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn when there are noises from the headliner. - TSB_2074846_4 Jan 13, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information about vibrations and rotational steering vibrations. - TSB_2060750_5 Jan 14, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information regarding UV leak additive for finding oil leaks. - TSB_2056019_5 Jan 5, 2026 · Service Bulletin/Repair Instructions
This bulletin provides information when the anti-theft alarm activates for no reason, or does not activate. - TSB_2080517_1 Dec 19, 2025 · Service Bulletin/Repair Instructions
This bulletin provides informaiotn when the starter battery is discharged or defective. - TSB_2061669_3 Dec 19, 2025 · Service Bulletin/Repair Instructions
This bulletin provides service infrmation for workshop mode with Audi connect vehicles. - TSB_2021205_9 Dec 16, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures. - TSB_2074808_3 Dec 11, 2025 · Service Bulletin/Repair Instructions
This bulletin provides additoinal information to assist in determining the energy content of lithium-ion high-voltage batteries. - TSB_2074640_2 Dec 11, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km. - TSB_2028220_13 Dec 11, 2025 · Service Bulletin/Repair Instructions
This bulletin provides regarding visual damage for all vehicles. - TSB_2018187_18 Dec 9, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information when there are speaker rattles, vibrations, or audio interference. - TSB_2080186_1 Nov 26, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information when the MIL is on, DTC P310B00 in ECM; Vapor pocket formation in fuel system. - TSB_2069904_2 Oct 22, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information for all models regarding brake sounds. - TSB_2079732_1 Oct 17, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information when tehre is a paint issue on alloy wheels. - TSB_2075120_2 Oct 21, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information regarding the general approach for all Audi vehicles regarding brake vibrations. - TSB_2074846_3 Oct 17, 2025 · Service Bulletin/Repair Instructions
This TSB provides information regarding rotational and other steerihng wheel vibrations. - TSB_2072304_3 Oct 17, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information when there is an ABS/ESC speed sensor implausible signal. - TSB_2069078_3 Oct 21, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information on the zirconium insercts in the brake piston (ceramic brakes only). - TSB_2067132_3 Oct 21, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information when there is corrosion on the friction survace of steel brake discs. - TSB_2056386_11 Oct 17, 2025 · Service Bulletin/Repair Instructions
This bulletin provides information about the steering wheel alignment. - TSB_2030471_8 Oct 17, 2025 · Service Bulletin/Repair Instructions
This bulletin provides informaiton when the license plate mouting bracket threaded inserts are stripped. - TSB_2020552_14 Oct 17, 2025 · Service Bulletin/Repair Instructions
This bulletin provides guidance for exterior glass cleaning.
Source: NHTSA manufacturer communications files.