AutoUtility currently tracks 49 official NHTSA owner defect complaints for the 2018 Audi A4. Electrical System issues are the most frequently reported category, appearing in 16 complaints (32.7% of submitted records). Among these NHTSA complaint records, 1 filing cites a crash. The 2018 Audi A4 belongs to the 5th Generation (B9) platform.
- • Total NHTSA Complaints: 49 reports
- • #1 Reported Problem Area: Electrical System (16 reports • 32.7% of submitted complaints)
- • Secondary Problem Areas: Body & Structure (7), Driver Assistance & Safety Tech (7)
- • Crash-Citing Complaints: 1 filings
- • Fire-Citing Complaints: 0 filings
- • Complaints Reporting Injuries / Fatalities: 0 injury filings • 0 fatality filings
Most Reported Problems for 2018 Audi A4
Top automotive subsystem defect categories ranked by unique owner complaint volume in federal records
Electrical System
Body & Structure
Driver Assistance & Safety Tech
Engine & Cooling
Powertrain & Transmission
Symptoms Mentioned in NHTSA Owner Reports for 2018 Audi A4
Specific mechanical, electrical, and driver-assist defect symptoms identified via deterministic narrative analysis
AutoUtility uses deterministic phrase matching to identify recurring symptom descriptions within consumer-submitted NHTSA complaint narratives.
Loss of Motive Power While Driving
Recent NHTSA Owner Reports for 2018 Audi A4
Representative defect filings submitted by owners to the NHTSA Office of Defects Investigation
"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/sporadic. The scan also showed U112100, described as “Data bus..."
"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/sporadic. This indicates a transmission / powertrain control..."
"The vehicle has a recurring interior rattle / loose-trim concern involving interior panels, trim, speaker/subwoofer area, rear shelf, dashboard area, or related mounting components. The noise is not merely a comfort concern if it is caused by a loose component, fastener, grille, panel, or speaker..."
"The vehicle is subject to a Passenger Occupant Detection System / PODS safety recall involving the front passenger seat occupant-detection system and passenger airbag status. The concern is that the system may incorrectly detect whether a passenger is seated and may switch off or affect the front..."
"The short-term MPG / fuel-consumption display gives illogical and inconsistent readings. The display can show a significant drop in short-term fuel economy after the vehicle has been parked, locked, and not running, as if the system is incorrectly factoring parked/off time into the MPG calculation...."
Complaint History for Audi A4
Reported defect complaint volume across sibling model years (2015–2025)
| Model Year | NHTSA Complaints | Crash Reports | Safety Recalls | Detailed Report |
|---|---|---|---|---|
| 2015 Audi A4 | 45 | 4 | 1 | View 2015 Problems → |
| 2016 Audi A4 | 25 | 0 | 0 | View 2016 Problems → |
| 2017 Audi A4 | 81 | 4 | 1 | View 2017 Problems → |
| 2018 Audi A4 Current Page | 49 | 1 | 2 | Current |
| 2019 Audi A4 | 7 | 0 | 1 | View 2019 Problems → |
| 2020 Audi A4 | 143 | 1 | 3 | View 2020 Problems → |
| 2021 Audi A4 | 13 | 3 | 4 | View 2021 Problems → |
| 2022 Audi A4 | 7 | 0 | 3 | View 2022 Problems → |
| 2023 Audi A4 | 7 | 0 | 0 | View 2023 Problems → |
| 2024 Audi A4 | 2 | 0 | 0 | View 2024 Problems → |
| 2025 Audi A4 | 0 | 0 | 0 | View 2025 Problems → |
Detailed NHTSA Component Breakdown for 2018 Audi A4
Complete distribution of consumer defect reports across all 27 granular NHTSA system and subsystem classifications
| Vehicle Component / System | Total Complaints | Crash Reports | Fire Reports | Reported Injury Entries | Reported Fatality Entries |
|---|---|---|---|---|---|
| Other / Uncategorized NHTSA category: UNKNOWN OR OTHER | 6 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,STRUCTURE,UNKNOWN OR OTHER | 4 | 0 | 0 | 0 | 0 |
| Engine NHTSA category: ENGINE | 4 | 0 | 0 | 0 | 0 |
| Air Bags NHTSA category: AIR BAGS | 3 | 0 | 0 | 0 | 0 |
| Service Brakes NHTSA category: SERVICE BRAKES | 3 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,FORWARD COLLISION AVOIDANCE | 2 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,BACK OVER PREVENTION | 2 | 0 | 0 | 0 | 0 |
| Forward Collision Avoidance NHTSA category: FORWARD COLLISION AVOIDANCE | 2 | 0 | 0 | 0 | 0 |
| Powertrain NHTSA category: POWER TRAIN | 2 | 0 | 0 | 0 | 0 |
| Structure & Body NHTSA category: STRUCTURE | 2 | 0 | 0 | 0 | 0 |
| Suspension NHTSA category: SUSPENSION | 2 | 0 | 0 | 0 | 0 |
| UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM | 2 | 0 | 0 | 0 | 0 |
| Electrical System NHTSA category: ELECTRICAL SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,AIR BAGS,SEATS | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,STRUCTURE,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| ELECTRICAL SYSTEM,UNKNOWN OR OTHER,VISIBILITY/WIPER | 1 | 0 | 0 | 0 | 0 |
| ELECTRONIC STABILITY CONTROL (ESC) | 1 | 0 | 0 | 0 | 0 |
| Engine & Cooling NHTSA category: ENGINE AND ENGINE COOLING | 1 | 0 | 0 | 0 | 0 |
| Fuel & Propulsion System NHTSA category: FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,ENGINE | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ELECTRICAL SYSTEM,UNKNOWN OR OTHER | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM | 1 | 0 | 0 | 0 | 0 |
| POWER TRAIN,VEHICLE SPEED CONTROL,ENGINE | 1 | 0 | 0 | 0 | 0 |
| Steering NHTSA category: STEERING | 1 | 1 | 0 | 0 | 0 |
| SUSPENSION,WHEELS,SERVICE BRAKES | 1 | 0 | 0 | 0 | 0 |
The complaint records on this page are retrieved directly from the NHTSA Office of Defects Investigation (ODI) public database.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.