FREE VEHICLE RESEARCH
2018 Audi A4 Ultra
The 2018 Audi A4 Ultra has 1 NHTSA safety recall on file, 42 owner complaints, and gets about 31 mpg combined. Here's the full free record from NHTSA and the EPA.
SPECS
2018 Audi A4 Ultra at a glance
- Engine
- 4-cyl 2L
- Cylinders
- 4
- Displacement
- 2 L
- Drivetrain
- Front-Wheel Drive
- Transmission
- Automatic (AM-S7)
- Body
- Compact Cars
- Fuel
- Premium
Source: EPA / NHTSA vPIC, as of July 11, 2026.
SAFETY RECALLS · NHTSA
1 openSeats
10/11/2021
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.
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.
NHTSA has opened one or more investigations covering this model. Recalls can follow an investigation, so check NHTSA for the latest before you buy.
Open safety recalls are free to fix at any franchised dealer. What recalls mean → Source: NHTSA recalls, as of July 11, 2026. Recalls can be issued any time, confirm by VIN at nhtsa.gov before you buy.
OWNER COMPLAINTS · NHTSA
42 filed- 14
ELECTRICAL SYSTEM
A vehicle diagnostic scan dated 04/15/2026 showed electrical communication faults involving vehicle control modules. The scan showed U014100, described as “Lost Communication With Body Control Module ‘A’,” with status listed as passive/spor
- 8
UNKNOWN OR OTHER
The vehicle displayed a low coolant warning and the coolant reservoir was low. Audi dealer service records dated on or about 02/14/2025 document the concern as: “client states low coolant warning was on, coolant reservoir is low, diagnose a
- 5
POWER TRAIN
A vehicle diagnostic scan dated 04/15/2026 at approximately 88,502 miles showed a stored transmission electronics fault: P084100, described as “Transmission fluid pressure sensor/switch A range/performance,” with status listed as passive/sp
- 3
AIR BAGS
I first received notice of this recall in 1/22. My Audi dealer has continuously stated that Audi does not send them enough kits to remedy this recall
- 2
SUSPENSION
An Audi dealer installed 245/40R18 93H tires on this 2018 Audi A4, while the vehicle placard/specification requires 245/40R18 97H. The lower load index reduces capacity from 1,609 lb per tire to 1,433 lb per tire, approximately 704 lb total
- 2
FORWARD COLLISION AVOIDANCE
The Audi Pre-sense engaged on 3 occasions going 50+ mph bringing the car to a complete stop when there was nothing in front if it and a car right behind me. I was lucky the car behind me did not collide. If it had been a semi truck and just
Problems owners reported to the government, useful for spotting patterns, not proof any one car has them. What complaints mean → Source: NHTSA complaints, as of July 11, 2026. Owner-submitted reports, not verified diagnoses.
CRASH-TEST RATINGS · NHTSA NCAP
- Overall
- ★★★★★
- Frontal
- ★★★★☆
- Side
- ★★★★★
- Rollover
- ★★★★★
Government crash tests of this model; not every trim or year is tested. Source: NHTSA NCAP, as of July 11, 2026.
FUEL & RUNNING COST · U.S. EPA
- Combined
- 31 mpg
- City / Hwy
- 27 / 37
- Est. fuel / yr
- $2,500
- CO₂ / mi
- 284 g
EPA lab estimates; real mpg varies by how you drive. Source: EPA fueleconomy.gov, as of July 11, 2026. Annual cost assumes 15,000 mi/yr at EPA's reference price.
All figures above come from free U.S. government sources: NHTSA (recalls, complaints, investigations, crash tests) and the EPA (fuel economy and specs). We don't show market price, insurance cost, or proprietary reliability scores, because there's no free, reliable public source for them. For a verdict on a specific listing, with a fair-offer number and what to ask the seller, that's the VINly app.
BEFORE YOU BUY
What to check on this car
Confirm the recall was fixed
This model has 1 open NHTSA recall (including the seats). Recall repairs are free at the dealer, so ask the seller for proof the remedy was performed, or verify by VIN at nhtsa.gov before you buy.
Have a mechanic check the electrical system
Owners report problems with the electrical system more than anything else on this model. Call it out specifically during a pre-purchase inspection.
Watch for a pending investigation
NHTSA has an open investigation covering this model. A recall can follow an investigation, so check nhtsa.gov for the latest before you commit.
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Test-drive the basics
Cold start, full-lock steering both ways, firm brakes with no pulsing, smooth shifts, and every electronic feature. Warning lights should come on at key-on, then go out.
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Check the title and the VIN
Confirm the title status in hand matches the listing, and that the VIN matches across the dash, door jamb, and title. VINly does not show ownership or accident history, for that, run a paid report like Carfax.
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Ask the seller the right questions
Why they are selling, any service records, accident or panel-repaint history, how many owners, and whether any open recalls were completed.
See the full used-car inspection checklist. None of this replaces a hands-on inspection by a mechanic.
Quick answers
What is recalled on the 2018 Audi A4 Ultra? +
NHTSA lists 1 safety recall for the 2018 Audi A4 Ultra, including the seats. See the full list above, and confirm by VIN at nhtsa.gov.
What gas mileage does the 2018 Audi A4 Ultra get? +
The EPA rates the 2018 Audi A4 Ultra at 31 mpg combined (27 city / 37 highway), about $2,500 a year in fuel.
How safe is the 2018 Audi A4 Ultra? +
NHTSA's NCAP program gives the 2018 Audi A4 Ultra 5 out of 5 stars overall, with 5 stars for rollover resistance.
What do owners complain about on the 2018 Audi A4 Ultra? +
Owners have filed 42 complaints with NHTSA for the 2018 Audi A4 Ultra, including 1 involving a crash. The most-reported area is electrical system.
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