2025 Audi A3 S Line 35 Tfsi Mhev S-A 1.5L Petrol · 87 AC

The 1.5-litre TFSI mild-hybrid powertrain is rated in a relatively favourable VED band for a petrol car of this performance level, though exact tax costs depend on list price. Real-world fuel economy typically falls in the mid-40s mpg for mixed driving, helped by the mild-hybrid system's coasting and brake-energy recovery functions. Insurance is likely to sit in groups 25-30 depending on the driver's profile, owing to the S Line trim and 150hp output.

Routine maintenance costs for the A3 are moderate; a major service with brake fluid and oil change typically runs in the £350-£500 range at a main dealer, with independent specialists offering significantly lower prices. The mild-hybrid 48V system adds some complexity to electrical diagnostics if warning lights appear, which can push repair bills up at non-specialist garages. Overall annual running costs, including fuel, tax, insurance, and routine servicing, are estimated at around £1,400-£1,800 depending on mileage and driving style.

Given that the model's aggregate data shows registration plate inscription and tyres as the top MOT failure reasons, both warrant close physical inspection on this vehicle. Check that the number plates are correctly formatted, undamaged, and of the correct character/font — a surprisingly common reason for failure even on nearly-new cars. Tyre condition should be examined across all four wheels, paying particular attention to inner shoulder wear, which can be accelerated by the S Line's lowered sport suspension and larger wheel fitment.

Although this individual car has a clean MOT record, buyers should still carry out the usual pre-purchase checks: look for uneven panel gaps (indicating accident repair), inspect the 1.5 TFSI engine bay for oil leaks around the cam chain area, and confirm that all mild-hybrid system warning lights extinguish promptly on startup. The 7-speed S tronic automatic should be test-driven with multiple low-speed and high-speed gear changes to ensure smooth operation. Finally, verify that the digital instrument cluster and MMI infotainment system are functioning without flickering, as these are areas where early-production 2025 models occasionally required software rectification.