The Used Car Index

2018 Audi A4 problems

NHTSA lists 44 complaints for the 2018 Audi A4, 1 of them mention a crash and 0 mention a fire. 0 complaints mention an injury, with 0 injuries and 0 deaths reported.

Data build 2026-10-07.

NHTSA lists this vehicle as AUDI A4.

At a glance

Complaints
44
With crash
1
With fire
0
With injury (complaints)
0
Injuries
0
Deaths
0
Recalls
1
Do not drive recalls
0
Park outside recalls
0
Recall potential units (maximum)
208,332
Investigations
0
Open investigations
0
Manufacturer communications
773

Complaints per 100k sold unavailable. No sales source is available for this record.

Where the complaints are

Top systems
SystemComplaintsShare of this vehicle's complaints
UNKNOWN OR OTHER1840.9%
ELECTRICAL SYSTEM1738.6%
FUEL/PROPULSION SYSTEM613.6%
STRUCTURE613.6%
ENGINE511.4%
POWER TRAIN511.4%
AIR BAGS49.1%
FORWARD COLLISION AVOIDANCE49.1%
SERVICE BRAKES49.1%
BACK OVER PREVENTION24.5%
Top subsystems
SystemSubsystemComplaints
STRUCTUREBODY6
FORWARD COLLISION AVOIDANCEWARNINGS3
FORWARD COLLISION AVOIDANCEAUTOMATIC EMERGENCY BRAKING2
BACK OVER PREVENTIONREARVIEW SYSTEM BRAKING1
BACK OVER PREVENTIONWARNINGS1
ELECTRICAL SYSTEMSTARTER ASSEMBLY1

One complaint can name several systems, so shares can add to more than 100 percent.

Model-generated complaint tags

These labels are model-generated, not NHTSA data.

Failure modes
LabelCountShare of taggedMean confidence
electrical electronic1329.5%0.93
mechanical failure920.5%0.78
visibility or lighting511.4%0.69
restraint or airbag49.1%0.80
unclear49.1%0.87
fluid or fuel leak36.8%0.77
loss of control24.5%0.49
noise or comfort24.5%0.91
structural or corrosion24.5%0.90
Severities
LabelCountShare of taggedMean confidence
moderate2863.6%0.78
low1125.0%0.65
high36.8%0.57
none24.5%0.99

Model: typesafe/jev-1.13-20260917; schema version: tag-v1. 44 tagged complaints of 44 complaints (100.0%).

Confidence is the model's own probability for the label it chose (0 to 1), not accuracy.

Model-generated labels on tagged complaints only. Model years 2013 and newer are tagged in full; 2012 in part (see tagged_share); earlier model years have no tags. NHTSA's own flags remain separate in the complaints block.

Recalls

1 recalls.

21V874000

Date: 2021-11-10. Systems: AIR BAGS, SEATS.

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 (excerpt)

Consequence: A disabled passenger air bag increases the risk of injury in the event of a crash. (excerpt)

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 reme (excerpt)

Do not drive: No. Park outside: No.

Investigations

0 investigations; 0 open.

Manufacturer communications

773 manufacturer communications.

Communications by system
SystemCount
EQUIPMENT206
ELECTRICAL SYSTEM189
UNKNOWN OR OTHER78
STRUCTURE74
POWER TRAIN51
STEERING47
SUSPENSION45
ENGINE AND ENGINE COOLING43

11038027

Date: 2026-09-25. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

This bulletin provides information for reporting safety related information to the manufacturer.

11038130

Date: 2026-09-25. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

This bulletin states that technicians are required to report to the manufacturer when a vehicle has flooded, and specify the height to which the vehicle has been flooded.

11038024

Date: 2026-09-22. Type: Service Bulletin/Repair Instructions. Systems: VISIBILITY/WIPER.

This bulletin provides service information regarding exterior glass cleaning.

11038042

Date: 2026-09-22. Type: Service Bulletin/Repair Instructions. Systems: STEERING.

This bulletin provides information about vibrations and rotational steering vibrations.

11038056

Date: 2026-09-18. Type: Service Bulletin/Repair Instructions. Systems: STRUCTURE.

This bulletin provides information about billing for a broken sunroof glass panel.

11038025

Date: 2026-09-15. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

This bulletin provides information when the license plate mounting bracket threded inserts are stripped.

11038026

Date: 2026-09-08. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

This bulletin provides infomraiton abou the Audi frequency analysis application, which is available in the App Store for Android and Apple phones.

11038033

Date: 2026-09-08. Type: Service Bulletin/Repair Instructions. Systems: STRUCTURE.

This TSB describes a corrosion issue due to outside influence and the prohibition of warranty in these cases.

11038061

Date: 2026-09-02. Type: Service Bulletin/Repair Instructions. Systems: ELECTRICAL SYSTEM.

This bulletin provides information regarding fault finding and repair information for electric tailgate.

11036917

Date: 2026-08-26. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.

This bulletin provides information when the horn sound quality is poor.

Notes on this record

  • Complaints from the API and bulk file are merged and deduplicated by ODI number; the API alone misses records.
  • System and subsystem counts are numbers of distinct complaints, recalls or communications that name them. One record can name several systems, so shares across systems can add to more than 100 percent; a single share never exceeds 100 percent.
  • Recalls are counted once per campaign, investigations once per action and manufacturer communications once per NHTSA id, even when NHTSA lists several model names for the same record.
  • A sales denominator is a calendar-year proxy, not the population of vehicles still in use. Rates are copied from verified pipeline output.

Other names NHTSA uses

None listed.

Matched NHTSA models

Matched labels and complaints
NHTSA model labelComplaints
A444

Same model, other years

All model years | All Audi models

Other Audi models, 2018

Sources

Get this record as JSON

The free rate-limited demo needs no key.

curl "https://api.theusedcarindex.com/v1/demo/vehicle_risk?make=Audi&model=A4&year=2018"

Paid endpoint: https://api.theusedcarindex.com/v1/vehicle_risk. MCP endpoint: https://api.theusedcarindex.com/mcp.