This 2018 Audi S3 Sportback is a well-maintained, enthusiast-owned example finished in excellent condition. It benefits from a full Audi service history, has had just two owners, and has covered 77,000 miles. The car drives exactly as it should, with no warning lights or faults. The specification includes Bang & Olufsen premium sound system, Audi Virtual Cockpit, keyless entry with push-button start, front and rear parking sensors, upgraded Alcantara sports seats, and heated front seats. The interior is clean and well cared for, and the exterior presents in very good condition. The vehicle has been professionally modified by reputable specialists. It features an AET Motorsport Stage 1 ECU and TCU upgrade producing approximately 375bhp, with a dyno printout available. Exhaust upgrades by Deutsch Tech, giving the car a strong but refined sound. Braking has been improved with upgraded Brembo pads and discs. Mechanically the car is excellent and has been maintained regardless of mileage. It has been driven sensibly, mainly on motorway journeys, always warmed up properly, and never abused. The car starts, drives and performs as expected, with smooth gear changes and strong performance throughout. MOT is valid until 20/12/2026. This is a properly sorted Audi S3 with desirable factory options, tasteful performance upgrades, and a perfect full service history. Ideal for someone looking for a fast, comfortable daily car with proven performance. Viewings welcome. Serious enquiries only.