AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2018 Audi A4
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $7,500–$12,000
The 2018 Audi A4 has an average reliability rating due to moderate electrical complaints and a recall affecting the seat occupancy detection system. It performs well overall but has notable issues in electrical components, which can result in future repair costs.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| electrical system | 30,000–60,000 miles | $400–$800 | very common |
| fuel/propulsion system | 50,000–80,000 miles | $300–$750 | common |
| engine | 60,000–90,000 miles | $500–$1,500 | occasional |
| seats | 40,000–70,000 miles | $200–$600 | occasional |
| forward collision avoidance | 40,000–70,000 miles | $300–$700 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil change every 10,000 miles
- Brake fluid replacement every 40,000 miles
- Spark plug replacement at 40,000 miles
- Tire rotation every 10,000 miles
- Coolant flush every 60,000 miles
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Electrical warning lights
- Engine performance drop
- Unresponsive seat heaters
- Sensor malfunction warnings
- Fuel system leaks or odors
Generated by gpt-4o on 8/22/2026. Cost ranges are conservative estimates that account for typical regional variation.