BMW N20 Oil Pump 11277632111 11417610378 Counterbalance Shaft Assembly

Technical Specifications

Typical Failure Symptoms in N20 Engines

A worn or malfunctioning BMW 2.0T N20 Oil Pump Assembly or Counterbalance Shaft Unit 11277632111 can cause multiple observable issues:

• Low oil pressure warnings at idle or during warm-up, indicating reduced pump efficiency (oil pressure issues BMW N20 11417610378 causes).
• Delayed oil pressure build-up after cold starts, often linked to internal leakage within the BMW N20 Engine Oil Pump Balance Shaft Assembly.
• Increased engine noise or knocking, resulting from insufficient lubrication of bearings and valvetrain.
• Oil pressure fault codes after service tasks, such as oil changes, which may reappear despite proper oil levels.
• Erratic VANOS response or cam timing errors caused by unstable lubrication and pressure fluctuations.

These symptoms often coincide with related N20 weak points, such as timing chain stretch or failed oil pump drive chains, which can further reduce lubrication efficiency.

Why Choose Us as Your BMW N20 B20 Oil Pump Assembly Supplier？

Our BMW N20 B20 Oil Pump Assembly with counterbalance shaft is engineered to precision tolerances suitable for professional workshops, parts distributors, engine rebuilders, and performance servicing:

• Direct replacement fitment: Designed to align with original mounting points and oil galleries without modification.
• Balanced hydraulic delivery: The integrated BMW Counterbalance Shaft Unit 11277632111 for F30 328i N20 helps reduce NVH levels and improves rotational stability across the engine’s operating range.
• Quality assurance: Components undergo stringent dimensional checks and performance tests to ensure pressure integrity and flow rates close to OEM behaviour.
• Compatibility breadth: Serves a wide range of BMW applications from compact 1 Series to larger SUVs using the N20 engine families.
• Reliable supply: Factory inventory and stable lead times support professional maintenance schedules and rebuild workflows.

FAQ

1. What is the difference between 11277632111 and 11417610378 on BMW N20 engines?

11277632111 is the counterbalance shaft unit, which integrates the balance shaft and drive gear mechanism. It reduces vibration and serves as the structural mount for the oil pump drive. 11417610378 is the engine oil pump itself, responsible for generating and maintaining oil pressure for lubrication.

2. Can the 11417610378 oil pump be purchased independently?

Yes. 11417610378 refers specifically to the pump and can be sold and fitted independently if only the pump is worn. Professional installers should verify internal backlash and timing alignment during installation.

3. Is the 11277632111 counterbalance shaft unit always replaced with the pump?

Not necessarily. In professional rebuilds, the counterbalance shaft unit may be replaced together with the pump, especially for high-mileage N20 engines, to ensure correct vibration balance and gear engagement.

4. Why do some assemblies list both numbers together?

Suppliers often group 11277632111 and 11417610378 as a single module because they function as an integrated BMW N20 Oil Pump with Counter Balance Shaft, simplifying fitment during full engine rebuilds.

5. Is this unit compatible with BMW 320i, 328i, and X models?

Yes, the assembly fits 11277632111/11417610378 Fitment for BMW F20 F22 F30 F31 F32 F34 F36 X1 X3 X4 and other N20 applications.

6. Is N20 oil pump balance shaft unit for engine rebuild OEM quality maintained in aftermarket?

Quality aftermarket units replicate OE dimensional tolerances, balance shaft hardness specs, and pressure outputs. We use same hardness testing and pressure verification protocols as OE contracts. Main difference: aftermarket pricing without dealer markup.

7. What warranty and payment terms?

Warranty covers 12 months or 12,000 miles from ex-factory date. Payment: 30% T/T deposit upon order, 70% balance before shipment. Delivery: EXW or FOB Ningbo. Custom branding available for qualifying volumes.

8. Can this assembly be used for engine rebuilds?

Yes. It is fully compatible as a N20 oil pump balance shaft unit for engine rebuild OEM, ensuring correct oil pressure and vibration control.

Compatible Vehicle Model

This BMW Counterbalance Shaft Unit 11277632111 is most commonly applied in BMW vehicles equipped with the N20 2.0T engine platform, covering model years approximately from early 2012 through later years of production across multiple series — providing broad applicability for workshop inventories and parts catalogues.