New turbo 1.4 tsi A1 Alhambra Ibiza Fabia Golf Jetta Scirocco Tiguan 53039880459 53039880248 53039880162 53039880150 53039880142 53039880099 03C145701B 03C145701G 03C145701K 03C145701Q 03C145701T

New Turbocharger Replacement – VAG 1.4 TSI Twincharger

Restore the high-performance "Twincharger" punch of your engine with this brand-new premium replacement turbocharger. Specifically engineered for the complex 1.4 TSI engines that utilize both a turbocharger and a mechanical supercharger, this unit provides the precision airflow and heat resistance required for these high-output powerplants.

Extensive Vehicle Compatibility

This turbocharger is a direct 1:1 replacement for the following models equipped with the 1.4 TSI / TFSI engine:

Engine Codes: BLG, BMY, BWK, CAVA, CAVB, CAVC, CAVD, CAVE, CAVF, CTHA, CTHB, CTHD, CTHE, CTHF, CTJB, CTKA, CNWA, CNWB, CNUB, CKMA.

Technical Specifications & Cross-Reference

This unit replaces the BorgWarner/KKK K03 series used in the Twincharger system. Verify your compatibility:

Key Product Features

• 100% Brand New: Zero-mileage unit. Every component, including the integrated exhaust manifold and actuator, is factory-new.
• Extreme Heat Resilience: Manufactured from high-nickel cast iron alloys to handle the intense exhaust temperatures typical of small-displacement, high-boost Twincharger engines.
• VSR High-Speed Balancing: Precision-balanced at speeds exceeding 150,000 RPM to eliminate vibration, ensuring silent operation and preventing bearing failure.
• Calibrated Wastegate: The actuator is factory-set to ensure seamless transition between the supercharger and turbocharger boost phases.

Critical Installation Requirements

The 1.4 TSI Twincharger is a highly technical engine; follow these steps to protect your warranty:

1. Oil System Hygiene: Change the oil and filter using only high-quality synthetic oil (VW 504.00/507.00). Replacing the oil feed line is mandatory due to heat-soak carbonization.
2. Prime the Turbo: Fill the oil inlet with clean oil and rotate the wheel by hand before the first start to ensure the bearings aren't dry.
3. Cooling System Check: Ensure the electric auxiliary water pump is working correctly, as it cools the turbocharger after the engine is turned off.
4. Boost Leak Test: Inspect all hoses and the intercooler for leaks, which are common and can cause the turbo to over-spin.