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The BorgWarner K03 Turbocharger (53039880106) is a genuine OEM-style replacement turbo designed for the Audi A4 1.8 TFSI (2007+) engine. Built to original equipment specifications, this turbocharger restores factory boost response, drivability, and reliability for daily-driven and lightly modified vehicles.
Featuring an integrated exhaust manifold, the K03 turbocharger is engineered for efficient packaging and smooth power delivery across the factory RPM range. BorgWarner’s OEM manufacturing standards ensure durability under high thermal loads while maintaining the fast spool characteristics that the K03 platform is known for.
This turbocharger is ideal for stock replacement, maintenance, or mild performance builds where factory-correct fitment and dependable performance are required.
Genuine BorgWarner OEM turbocharger
Direct replacement for factory K03 turbo
Integrated exhaust manifold design
Fast spool and smooth power delivery
Built to withstand high thermal loads
Restores factory boost and drivability
Ideal for OEM replacement or mild upgrades
Factory Power Rating: 120–160 HP
Practical Turbo Limit: ~220 HP (with supporting modifications)
Turbo Type: BorgWarner K03
Manifold Type: Integrated
Engine Application: Audi 1.8 TFSI
Manufacturer: BorgWarner
OEM Application: Audi
BorgWarner K03 Turbocharger Assembly
Gaskets, hardware, and oil lines sold separately unless otherwise stated.
Direct OEM replacement
Professional installation recommended
ECU adaptation or inspection recommended after installation
BorgWarner is a global leader in OEM turbocharger technology, trusted by manufacturers like Audi for factory-installed forced-induction systems. BorgWarner turbochargers deliver original performance, reliability, and fitment—making them the preferred choice for OEM replacements.
