VehicleVerdict

2018 Audi S4 problems

Verdict · NHTSA data

Limited data — recalls on file

NHTSA has just 9 complaints on file for the 2018 Audi S4 — too few to judge reliability from owner reports alone — but 2 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.

9

NHTSA complaints

2

Recalls

0

Investigations

0

Crash-involved

0

Fires reported

0

Injuries

0

Deaths

—

NCAP overall

How does 2018 compare to other S4 years?

S4 NHTSA complaints by model year, 2018 highlighted171 complaints1989: 0 complaints1990: 0 complaints1991: 0 complaints1992: 5 complaints1993: 18 complaints1994: 8 complaints1995: 1 complaints1996: 0 complaints2000: 171 complaints2001: 92 complaints2002: 31 complaints2003: 1 complaints2004: 37 complaints2005: 54 complaints2006: 37 complaints2007: 21 complaints2008: 4 complaints2009: 0 complaints2010: 73 complaints2011: 34 complaints2012: 27 complaints2013: 34 complaints2014: 23 complaints2015: 1 complaints2018: 9 complaints2019: 3 complaints2020: 34 complaints2021: 2 complaints2022: 1 complaints
S4 NHTSA complaints by model year, 2018 highlighted. Red bars are years to avoid.

See all S4 years to avoid →

What are the most common 2018 Audi S4 problems?

ComponentComplaintsShare
Engine444%
Brakes111%
Speed Control111%
Body & Structure111%
Suspension111%
Transmission111%

Does the 2018 Audi S4 have recalls?

2 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.

21V874000AirbagsNovember 10, 2021 · 208,332 units

Defect

Volkswagen Group of America, Inc. (Audi) is recalling certain 2017-2020 A4 Allroad, A4 Sedan, 2018-2019 RS5 Coupe, 2019 RS5 Sportback, 2018-2020 A5 Cabriolet, A5 Coupe, A5 Sportback, S4 Sedan, S5 Cabriolet, S5 Coupe, and Audi S5 Sportback vehicles. The cable connecting the seat heater to the Passenger Occupant Detection System (PODS) may have a contact fault, causing the software to misdiagnose a malfunction and disable the passenger air bag.

Consequence

A disabled passenger air bag increases the risk of injury in the event of a crash.

Remedy

Dealers will replace the connecting cable and either the heating mat or entire seat cover, free of charge. Owner notification letters were mailed January 7, 2022. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 74E3. This recall is an expansion of Recall 19V-547 (74D9). Vehicles previously repaired under 19V-547 will need to return for the new remedy.

19V547000AirbagsJuly 24, 2019 · 145,337 units

Defect

Volkswagen Group of America, Inc. (Audi) is recalling certain 2018-2019 Audi RS5 Sportback, 2018 S5 Cabriolet, S5 Sportback, S5 Coupe, S4 Sedan, A5 Cabriolet, A5 Sportback, A5 Coupe, and 2017-2018 A4 Sedan and A4 Allroad vehicles. Oxidation on the Passenger Occupant Detection System (PODS) connecting cable may cause the software to misdiagnose a malfunction and disable the passenger air bag.

Consequence

A disabled passenger air bag increases the risk of injury in the event of a crash.

Remedy

Audi will notify owners, and dealers will install cable ties to the harness, free of charge. The recall began September 9, 2019. Owners may contact Volkswagen customer service at 1-800-893-5298. Audi's number for this recall is 74D9.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“Water pump defect for the 3.0L ea839 turbo engine found across many Porsche and Audi models. Defect causes damage to vacuum lines, thermostat, and can eventually lead to engine failure if not resolved. No way of knowing this is happening until you start to lose coolant (which will throw an engine…”

Complaint filed with NHTSA · Engine · May 8, 2025

“WHEN DRIVING IN MANUAL MODE AND TRANSITION FROM ON THE THROTTLE TO OFF-THROTTLE, THERE IS A 1-2 SECOND DELAY BEFORE THE ENGINE STOPS ACCELERATING AND TRANSITIONS TO DECELERATION. ESPECIALLY IN FIRST GEAR, THIS MEANS THAT THE VEHICLE CONTINUES TO ACCELERATE FOR THAT PERIOD OF TIME. I DROVE ANOTHER…”

Complaint filed with NHTSA · Transmission · November 14, 2017

“Audi Dealer inspection revealed Rear spring is broken and mounts are deteriorating. Dealer states not common and would result in accident if not repaired. Research indicates broken springs common with certain Audi vehicles (A4/S4, Q5 & Q7), especially 2018 model year. See Audi World forum website.…”

Complaint filed with NHTSA · Suspension · December 19, 2022

“THERE ARE TWO LARGE "UNDERRIDE GUARD" PANELS ON THE UNDERSIDE OF THE VEHICLE THAT ARE FASTENED BY SMALL, LOOSE-FITTING PLASTIC CLIPS. THERE IS ALSO FELT SOUND-DEADENING MATERIAL ON THE EXTERIOR SIDE OF THIS PANEL. WHEN THE VEHICLE IS DRIVEN IN RAIN OR SNOW, THE PANEL COLLECTS SNOW OR WATER UNDER…”

Complaint filed with NHTSA · Body & Structure · February 14, 2018

“WHEN DRIVING IN MANUAL MODE AND TRANSITION FROM ON THE THROTTLE TO OFF-THROTTLE, THERE IS A 1-2 SECOND DELAY BEFORE THE ENGINE STOPS ACCELERATING AND TRANSITIONS TO DECELERATION. ESPECIALLY IN FIRST GEAR, THIS MEANS THAT THE VEHICLE CONTINUES TO ACCELERATE FOR THAT PERIOD OF TIME. I DROVE ANOTHER…”

Complaint filed with NHTSA · Speed Control · November 14, 2017

2018 Audi S4 — common questions

Is the 2018 Audi S4 reliable?

The record is thin — 9 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 2 recalls should be verified as completed.

Does the 2018 Audi S4 have recalls?

Yes — NHTSA lists 2 recall campaigns affecting the 2018 Audi S4. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Which Audi S4 years should you avoid?

Based on complaint rates and open investigations, the S4 years to avoid are 2000, 2001, 2010, 2005, 2004, 2006, 2013, 2020, 2011, 2002. The cleanest record among S4 years belongs to 2009.

Related

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.