Our Verdict
The A4 is Audi's volume seller and a strong alternative to the BMW 3 Series and Mercedes C-Class. The B9 (2016+) brought a significant improvement in refinement and technology. Interior quality is best-in-class. Watch for TFSI oil consumption and S-tronic servicing.
Introduction
The Audi A4 has been the default choice for company car drivers and premium saloon buyers for decades. The B8.5 facelift (2012–2015) was solid, while the B9 (2016–present) was an entirely new car — lighter, more efficient, and with an interior that embarrassed the competition.
The A4 Avant (estate) is one of the best executive wagons with a cavernous 505-litre boot. The S4 and RS4 Avant are bucket-list performance estates.
With strong depreciation, a 3-year-old A4 with 30,000 miles can be had for around half its list price. Exceptional value for this quality.
Pros & Cons
✓ Pros
- Best interior quality in the compact executive class
- Virtual Cockpit and MMI are industry-leading
- Avant estate is exceptionally practical (505-litre boot)
- B9 is lighter and more efficient than any previous A4
- quattro AWD for all-weather confidence
- S4 and RS4 are world-class performance models
✗ Cons
- TFSI oil consumption can be excessive on B8.5 models
- S-tronic DSG servicing is expensive and often neglected
- FWD base models lack the sporty feel of a 3 Series
- Options list drives prices up rapidly
- Soft brake discs wear quickly
- Complex electronics mean expensive out-of-warranty repairs
Known Issues & Common Problems
TFSI oil consumption (B8.5)
High RiskThe 2.0 TFSI (EA888 Gen 2) is notorious for high oil consumption. Audi issued revised piston rings but not all fixed. Gen 3 in B9 largely resolved this.
When to check: Any mileage on B8.5 TFSIS-tronic service neglect
Medium RiskThe 7-speed S-tronic requires fluid changes every 40k miles. Many cars miss this, leading to premature failure. Always check service history.
When to check: 40,000+ milesThermostat failure
Medium RiskPlastic thermostat housing cracks causing coolant loss. Common on higher-mileage B9 cars. Budget £200–£400.
When to check: 60,000+ milesWater pump failure
Medium RiskPlastic impeller water pump fails on 2.0 TFSI. Same issue across the VW Group. £350–£500 fitted.
When to check: 60,000+ milesMOT Insights
Common MOT Failures
- Brake disc wear
- Suspension spring
- Headlamp aim
- Tyre condition
Common Advisories
- Brake disc corroded
- Oil leak
- Anti-roll bar linkage
- Front tyre inner wear
Good MOT pass rate. Watch for premature brake disc wear and inner front tyre wear. Budget for annual alignment check — saves money on tyres long-term.
Running Costs
| Insurance Group | 16–40 |
| Annual Road Tax | £0–£165 |
| Fuel Economy | 35–60 mpg |
| Service Interval | Variable or fixed 12 months / 9,300 miles |
| Typical Service | £200–£350 (independent) |
| Major Service | £350–£580 (independent) |
| Timing | Chain (all models) |
| Tyres | £90–£150 each |
Used Price Guide
Frequently Asked Questions
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