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Our read

GarageScout Take

APR ECU and TCU tuning paired with the factory sports differential gives this S5 a distinct performance configuration, with valve-cover work and a mechatronics circuit-board replacement documented in December 2025. Mileage sits mid-pack for this generation.

Strengths

  • Clean Carfax and no accident history reported by the seller.
  • Documented recent drivetrain service includes transmission fluid and filter replacement plus a mechatronics circuit board replacement.
  • The listing includes a build sheet and service documentation.

Watch For

  • Known cosmetic flaws include chips on the front fascia, a ding on the passenger-front door, curb rash on the wheels
  • The APR ECU and TCU tunes may prevent emissions testing or registration in some states.
  • The mechatronics circuit board was replaced in December 2025; the seller reports no warning lights, hesitation, or rough shifting since the repair.
  • The seller reports no water pump, thermostat, PCV, or serpentine belt replacement during current ownership, and says the components were checked instead.