Description

This listing is for a reconditioned Garrett GT17V turbocharger, specifically engineered for the BMW 320d E46 with the M47TU engine, producing 150 HP and manufactured between 2001 and 2005. We provide a meticulously reconditioned unit to restore your vehicle’s original performance and efficiency.

The Garrett GT17V is a variable nozzle turbine (VNT) turbocharger, meaning it utilises adjustable vanes to optimise exhaust gas flow across the turbine wheel. This design significantly improves throttle response and broadens the torque band, crucial for the BMW 320d’s performance characteristics. Common failure modes for this specific unit often involve the variable vane mechanism seizing due to carbon and soot build-up, leading to reduced boost, limp mode, or intermittent power loss. Electronic actuator faults are also prevalent, which can directly impact VNT operation and overall turbo control. Additionally, internal CHRA (Centre Housing Rotating Assembly) bearing wear, typically caused by oil starvation or contamination, can manifest as excessive noise or smoke from the exhaust.

What this turbocharger fits

This reconditioned turbocharger is a direct replacement for the following vehicle:

• Vehicle: BMW 320d E46
• Engine Code: M47TU
• Horsepower: 150 HP
• Year Range: 2001-2005
• Fuel Type: Diesel
• Original Equipment (OE) Part Number: 731877-5009s
• Alternative Part Number: 7790994I

At Gap Turbos, our reconditioning process involves a complete disassembly, inspection, cleaning, and replacement of all worn components with high-quality, new parts. The CHRA is balanced to OEM specifications, and the VNT mechanism is recalibrated to ensure optimal performance. Our service includes the supply of this reconditioned unit on an exchange basis, where your old, failed turbocharger is returned to us. For customers in the Birmingham area, we also offer a professional fitting service. We can also provide new exchange units where available, or offer a clean-and-check service for specific issues.

For a competitive quote on this reconditioned BMW 320d E46 turbocharger and details on our comprehensive warranty, please contact us directly. We are committed to supplying reliable, high-performance turbochargers backed by our expertise.

Specifications

Vehicle fitment

• BMW 320d E46

Common faults & troubleshooting

• Loss of power or vehicle entering ‘limp mode’: Often indicates a stuck variable nozzle turbine (VNT) mechanism or a faulty electronic actuator, preventing correct boost pressure regulation.
• Excessive blue or black smoke from the exhaust: Blue smoke suggests oil burning, potentially from failed turbocharger oil seals, while black smoke can indicate overfuelling or an air intake restriction.
• High-pitched whining or siren-like noise from the engine bay: A clear sign of internal bearing wear within the turbocharger’s CHRA, requiring immediate attention to prevent further damage.
• Noticeable turbo lag or delayed power delivery: This symptom points towards issues with the VNT mechanism sticking, a boost leak in the intake system, or a slow-responding actuator.
• Check Engine Light (CEL) illuminated with boost-related fault codes: Typically signals an electronic actuator malfunction, a faulty boost pressure sensor, or a significant boost leak detected by the ECU.

Fitting notes for this unit

• Pre-lubricate and Prime: Before fitting, manually spin the compressor wheel while introducing clean engine oil into the oil feed port. After installation, crank the engine without starting it for 10-15 seconds to build oil pressure before the first start.
• Replace Oil Feed Line: Always replace the oil feed pipe to the turbocharger. Old pipes can retain carbon deposits and restrict oil flow, leading to premature turbo failure.
• New Gaskets are Essential: Ensure all associated gaskets – exhaust manifold, downpipe, oil feed, and oil drain – are replaced with new items to prevent leaks and ensure proper sealing.
• Check Breather System: Inspect and clean or replace the crankcase breather system (PCV valve/oil separator) to prevent oil contamination and pressure build-up that can damage the new turbo.
• Torque Specifications: Adhere strictly to the manufacturer’s torque settings for all bolts, especially those securing the turbocharger to the manifold and downpipe, to prevent exhaust leaks or damage.
• Inspect Air Intake System: Thoroughly check all boost pipes and intercooler for cracks, splits, or loose connections, as unnoticed boost leaks will compromise performance and put strain on the new turbo.

Alternative part numbers

This turbo is also referenced by:

• 7790994I — BMW Turbocharger OEM 7790994I (BMW 320d E46, M47TU, 150hp)

Frequently asked questions