AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2021 Audi A4
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $7,000–$12,000
The 2021 Audi A4 has faced several recalls affecting safety and electronic systems. Common issues include electrical system complaints and rear axle alignment problems. While these recalls impact reliability, the problems are generally addressed by Audi under warranty, maintaining an overall average rating.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| rear axle | 40,000–60,000 miles | $800–$1,500 | common |
| electrical system | 30,000–50,000 miles | $400–$1,200 | common |
| seat belts | 50,000–70,000 miles | $200–$400 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter change
- Tire rotation
- Brake fluid replacement
- Spark plug replacement
- Cabin air filter replacement
- Alignment check
- Coolant flush
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Unusual tire wear
- Check engine light
- Electrical system malfunctions
Generated by gpt-4o on 6/18/2026. Cost ranges are conservative estimates that account for typical regional variation.