Description

This listing is for a reconditioned Garrett GT16V turbocharger, specifically designed for the Audi A3 2.0 TDI (R4) 140 HP engine, engine code BKD, manufactured between 2003 and 2009. We supply this unit as a reconditioned exchange, ensuring a cost-effective and reliable replacement for your failed turbo.

The Garrett GT16V series is a variable nozzle turbine (VNT) turbocharger, known for its efficiency across a wide RPM range. In this application, it delivers 140 horsepower for the Audi A3’s 2.0-litre diesel engine. Common failure modes for this specific turbocharger and engine combination typically involve the variable vane mechanism seizing due to carbon and soot build-up from exhaust gases. This can lead to over-boosting, under-boosting, or erratic boost control. Electronic actuator faults are also prevalent, often manifesting as limp mode or fault codes related to boost pressure regulation. Furthermore, like all turbochargers, the central housing rotating assembly (CHRA) bearings can wear out over time, leading to excessive shaft play, oil leaks into the exhaust or intake, and characteristic whining or grinding noises.

What this turbocharger fits

This reconditioned turbocharger is suitable for the Audi A3 2.0 TDI R4 (140 HP) with engine code BKD, produced from 2003 to 2009. The original equipment (OE) part number for this unit is 751851-5003s, with an alternative OE part number being 03G253014F. It is crucial to verify these part numbers against your existing unit to ensure correct fitment.

At Gap Turbos, our reconditioning process for this GT16V unit involves a complete strip-down, thorough cleaning, inspection of all components, and replacement of all wear parts with new, high-quality equivalents. The variable nozzle mechanism is carefully cleaned and recalibrated, and the electronic actuator is tested and replaced if necessary. The CHRA is balanced to OEM specifications. We offer this unit as a reconditioned exchange, meaning we require your old turbo back. We also provide a professional fitting service at our Birmingham workshop and can perform a full system clean to address underlying issues. For a precise quote or to discuss our warranty terms, please contact us directly.

Specifications

Vehicle fitment

• Audi A3 TDI R4

Common faults & troubleshooting

• Loss of power or limp mode: Often indicates a seized VNT mechanism or a faulty electronic actuator, preventing correct boost pressure regulation.
• Excessive smoke (blue/white): Can suggest oil leaking past worn CHRA bearings into the exhaust or intake system.
• Whining or grinding noise from the engine bay: Typically points to excessive shaft play within the turbocharger’s CHRA.
• Oil consumption increase: Check for oil ingress into the intake or exhaust, often a sign of failing turbo seals or bearings.
• Turbo lag or inconsistent boost: Likely due to a sticky VNT mechanism or an intermittently failing electronic actuator.

Fitting notes for this unit

• Always replace the turbocharger oil feed pipe and drain pipe gaskets to prevent oil leaks and ensure proper lubrication.
• Ensure the engine oil and oil filter are replaced with new, correct specification items before fitting the turbocharger.
• Prime the new turbocharger with clean engine oil through the oil feed hole before connecting the oil feed pipe to prevent dry start-up.
• Carefully inspect and clean all intake and exhaust pipework for debris or blockages, especially the intercooler, which can harbour contaminants.
• Torque all exhaust manifold and downpipe bolts to the manufacturer’s specified settings to prevent leaks and stress on the turbo housing.
• After installation, crank the engine without starting (e.g., by disconnecting fuel or ignition) for 10-15 seconds to allow oil pressure to build and circulate through the turbo.

Alternative part numbers

This turbo is also referenced by:

• 03G253014F — Audi Turbocharger OEM 03G253014F (Audi A3 TDI R4, BKD, 140hp)

Frequently asked questions