How Much Does It Cost to Run an Audi A4
The Audi A4 costs £2,475 to £3,200/year to run, in line with the BMW 3 Series and about £600 more than mainstream rivals. Covering every cost category with real-world figures.
The A4 Running Cost Reality
The Audi A4 (B9, 2016, present) competes with the BMW 3 Series and Mercedes C-Class as a premium executive saloon. Running costs sit between mainstream family cars and full-fat luxury. You're paying a premium over a Skoda Superb or Ford Mondeo, but less than you might expect for a premium German badge.
This guide covers the most common used A4: the 35 TFSI (2.0 turbo petrol, 150 bhp) S Line with 30,000 to 60,000 miles, covering 10,000 miles per year. All costs are based on 2025 real-world data from owner reports and independent garages.
Annual Cost Breakdown
| Cost Category | Annual Estimate | Notes |
|---|---|---|
| Insurance (Group 22 to 26) | £600 to £900 | S Line adds 2 groups over Sport |
| Road tax | £155 to £165 | Standard rate for petrol |
| Fuel (10,000 miles at 40 mpg) | £1,250 to £1,450 | Based on £1.45 to £1.55/litre |
| Servicing | £250 to £380 | Depends on dealer vs independent |
| Tyres (pro-rata) | £180 to £250 | 18" S Line tyres are expensive |
| MOT | £40 to £55 | Standard test fee |
| Depreciation (year 5 to 6) | £2,000 to £2,500 | Significant but slowing |
| Running costs (ex depreciation) | £2,475 to £3,200 | |
| Total cost of ownership | £4,475 to £5,700 | Including depreciation |
That's comparable to the BMW 3 Series and about £500 to £700/year more than a VW Tiguan or Skoda Superb. The A4's costs are driven primarily by higher insurance groups and premium-brand servicing and parts pricing.
Insurance Groups: What You'll Pay
| Model | Insurance Group | Est. Premium (30yo, 5 NCB) |
|---|---|---|
| 30 TFSI Sport | 20 | £500 to £700 |
| 35 TFSI Sport | 22 | £550 to £750 |
| 35 TFSI S Line | 24 | £600 to £850 |
| 40 TFSI S Line | 28 | £700 to £1,000 |
| 35 TDI Sport | 23 | £550 to £780 |
| 35 TDI S Line | 25 | £620 to £880 |
| 45 TFSI quattro S Line | 32 | £800 to £1,200 |
| S4 | 38 | £1,000 to £1,500 |
S Line bumps the group by 2 positions over Sport, adding £50 to £100/year for most driver profiles. The visual difference is worth it for resale, but factor the insurance uplift into your budget.
Check your specific quote at Thatcham and compare across multiple providers, A4 insurance varies significantly between insurers.
Fuel Economy: Real-World Numbers
| Model | WLTP Official | Real-World | Annual Fuel Cost (10k mi) |
|---|---|---|---|
| 35 TFSI (2.0 petrol) | 42 to 46 mpg | 36 to 42 mpg | £1,150 to £1,450 |
| 40 TFSI (2.0 petrol) | 38 to 42 mpg | 33 to 38 mpg | £1,300 to £1,550 |
| 35 TDI (2.0 diesel) | 52 to 58 mpg | 45 to 52 mpg | £900 to £1,100 |
| 40 TDI (2.0 diesel) | 48 to 54 mpg | 42 to 48 mpg | £950 to £1,200 |
| 45 TFSI quattro | 34 to 38 mpg | 30 to 35 mpg | £1,400 to £1,700 |
The diesel returns genuinely impressive economy for a car this size, the 35 TDI saves roughly £300 to £500/year on fuel versus the 35 TFSI. Over a typical 3-year ownership period, that's £900 to £1,500 in fuel savings. If you're doing 12,000+ annual miles, the diesel makes clear financial sense.
For moderate mileage (8,000 to 10,000 miles), the 35 TFSI petrol is simpler, cheaper to maintain (no DPF, no AdBlue), and has lower servicing costs, potentially offsetting the fuel premium.
Servicing Costs: Dealer vs Independent
Audi uses variable service intervals, typically triggering every 18,600 miles or 2 years (condition-based monitoring on newer models can extend this).
Audi Dealer Pricing
| Service Type | Cost |
|---|---|
| Minor service (oil, filter, checks) | £280 to £380 |
| Major service (oil, all filters, plugs, comprehensive checks) | £450 to £600 |
| Brake fluid change (every 2 years) | £80 to £120 |
| S Tronic/DSG gearbox service (every 40,000 miles) | £200 to £300 |
| Air conditioning service | £70 to £100 |
| Spark plugs (petrol, every 60,000 miles) | £150 to £220 |
Independent Audi Specialist Pricing
| Service Type | Cost | Saving vs Dealer |
|---|---|---|
| Minor service | £180 to £250 | 30 to 35% |
| Major service | £300 to £420 | 30 to 35% |
| Brake fluid change | £50 to £80 | 35 to 40% |
| S Tronic service | £150 to £220 | 25 to 30% |
| Spark plugs | £100 to £160 | 30 to 35% |
Using a reputable independent Audi specialist saves 30 to 40% on servicing without affecting the car's digital service record or resale value. Many specialists can update Audi's online service portal, maintaining the complete digital history.
Common Repair Costs
| Repair | Independent Cost | Dealer Cost |
|---|---|---|
| Front brake pads and discs | £220 to £350 | £280 to £420 |
| Rear brake pads and discs | £180 to £280 | £240 to £360 |
| Single tyre (18" S Line) | £100 to £150 | £130 to £180 |
| Full tyre set (18" S Line) | £400 to £600 | £520 to £720 |
| Water pump (2.0 TFSI) | £300 to £450 | £350 to £500 |
| Thermostat housing | £180 to £280 | £200 to £320 |
| Front control arm bushes (pair) | £200 to £320 | £250 to £400 |
| Air conditioning recharge | £60 to £90 | £70 to £100 |
| Battery (AGM start-stop) | £150 to £220 | £180 to £260 |
| Rear shock absorbers (pair) | £250 to £380 | £320 to £480 |
Known Weak Points
The 2.0 TFSI water pump and thermostat housing are documented weak points. Both can develop leaks from 50,000 miles onwards. The water pump uses a plastic impeller that can crack, and the thermostat housing's plastic body becomes brittle with heat cycling.
Budget £350 to £500 if the car is approaching 50,000 to 60,000 miles and there's no evidence these have been addressed. These are not catastrophic failures. You'll see a gradual coolant loss before anything dramatic, but they need attention before coolant loss becomes serious enough to cause overheating.
Depreciation: When to Buy
The A4 depreciates steadily but predictably:
| Age | 35 TFSI S Line (new: £36,000) | Value Retained | Annual Depreciation |
|---|---|---|---|
| 1 year | £27,500 | 76% | £8,500 |
| 2 years | £23,000 | 64% | £4,500 |
| 3 years | £19,500 | 54% | £3,500 |
| 5 years | £14,500 | 40% | £2,500 |
| 7 years | £11,000 | 31% | £1,750 |
| 10 years | £7,500 | 21% | £1,167 |
The buying sweet spot is 4 to 5 years old: the car has lost 50 to 60% of its new value but still feels genuinely modern and premium. S Line and Black Edition trims hold value best, buyers actively seek them on the used market, supporting stronger residuals.
A4 vs Competitors: Running Cost Comparison
| Category | Audi A4 35 TFSI | BMW 320i M Sport | Mercedes C200 AMG Line | Skoda Superb 2.0 TSI |
|---|---|---|---|---|
| Insurance group | 22 to 24 | 23 to 25 | 24 to 26 | 16 to 18 |
| Real-world mpg | 36 to 42 | 35 to 40 | 34 to 40 | 38 to 44 |
| Annual servicing | £250 to £380 | £280 to £400 | £300 to £420 | £180 to £280 |
| Tyres (set, 18") | £400 to £600 | £450 to £650 | £420 to £620 | £320 to £480 |
| Annual total | £2,475 to £3,200 | £2,600 to £3,400 | £2,700 to £3,500 | £1,900 to £2,600 |
The A4 sits mid-pack among premium rivals, cheaper than the Mercedes, comparable to the BMW. The Skoda Superb offers the same VW Group 2.0 TSI engine with significantly lower running costs, but without the premium badge and interior quality.
How to Reduce A4 Running Costs
- Use an independent specialist: saves 30 to 40% on servicing without compromising quality or service history
- Choose 17" wheels over 18": tyres cost 25 to 30% less and ride quality improves noticeably
- Consider the 35 TDI for 12,000+ annual miles, fuel savings of £300 to £500/year offset higher diesel servicing costs
- Buy the S Tronic (auto): but ensure the 40,000-mile gearbox service is up to date. Skipping it leads to expensive repairs
- Check for service plans: Audi's prepaid service packs can save 20 to 25% over pay-as-you-go pricing
- Shop around for insurance: A4 premiums vary enormously. Use Confused.com and also try Admiral and Direct Line directly
Dave's A4 Running Cost Verdict
The Audi A4 costs £2,475 to £3,200 per year to run, roughly in line with its BMW 3 Series rival and about £600 more annually than a mainstream alternative like the Skoda Superb. The 35 TDI diesel is the most economical choice for high-mileage drivers; the 35 TFSI petrol is simpler and cheaper to maintain for moderate mileage.
Key cost-savers: use an independent specialist for servicing, budget for 18" S Line tyres (they're not cheap), and ensure the S Tronic gearbox service is up to date. The water pump and thermostat housing are the main financial risks, budget accordingly if the car is at 50,000 to 60,000 miles.
Check the MOT history for any cooling system advisories, and verify values on AutoTrader before buying. A well-maintained A4 is a pleasure to own, a neglected one quickly becomes an expensive headache.