Turbocharger KKK Borgwarner original 53039880005 A4, A6 Passat 1.8T

Borgwarner K03 turbocharger for 1.8T longitudinal engines

Scope of delivery:

• 1x Original Borgwarner KKK K03 Turbocharger (Part Number: 53039900005 / 53039880005) – specifically for 1.8T longitudinal engines

Technical Specifications:

• Cooling system: Efficient oil- and water-cooled for maximum durability under thermal load

• Boost pressure control: With integrated, internal wastegate (including pre-set turbo actuator)

• Design: Classic K03 layout, perfectly matched to the geometry and exhaust system of longitudinally mounted 1.8T engines. The ideal, durable OEM replacement for restoring full stock performance and optimal efficiency.

Use in the tuning scene:

• The reliable OEM replacement: For vehicles with a longitudinally mounted 1.8T engine (such as the Audi A4 B5/B6 or VW Passat), this original Borgwarner turbocharger is the first choice for replacing defective or worn-out stock turbos. It guarantees a 100% perfect fit without any modifications to the exhaust manifold, oil lines, or water lines.

• Solid foundation for moderate ECU tuning: The classic K03 turbocharger for longitudinal engines also offers an excellent foundation in the scene for moderate map tuning (Stage 1). Consistent power outputs of approx. 180–190 hp and significantly more robust torque in the mid-range can be achieved, making it perfectly suitable for everyday use.

• Perfect for daily drivers: Thanks to its excellent, quick response, the smooth and lively character of the 1.8T engine is fully preserved—ideal for comfortable long-distance vehicles and daily commutes.

Suitable for (VAG 1.8T longitudinal engines):

• Audi A4 B5 / B6 1.8T: 150 hp models with engine codes AEB, APU, ARK, ANB, AWT, AVJ

• Audi A6 C5 1.8T: 150 hp models with engine codes AEB, APU, ARK, ANB, AWT

• VW Passat B5 / 3B / 3BG 1.8T: 150 hp models with engine codes AEB, APU, ANB, AWT

• Universally applicable: Thanks to its compact design for longitudinal installation, it is also a popular supercharger for special custom projects and engine swaps (e.g., 1.8T conversions in older Audi 80/90 models or VW T3/T4 vans with longitudinal engine mounts).