11377630747 Eccentric Shaft for BMW N20 Valvetronic Engine
The 11377630747 Eccentric Shaft is a critical component in BMW N20 engines, controlling intake valve lift within the Valvetronic system. On N20 engines, early wear on this shaft often triggers camshaft failure symptoms BMW N20, such as inconsistent idle or power dips under light throttle. The shaft shifts from minimal valve opening at low-load cruising to full lift under higher demands, all without heavy throttle intervention. In workshop inspections, units with 130,000+ km often show flattened lobes that limit minimum lift, causing adaptation faults or the characteristic actuator buzz on overrun.
Rebuilders handling N20 blocks monitor journal runout closely—keeping it below 0.025 mm reduces needle bearing load and prevents shaft binding mid-stroke. The 11377630747 Valvetronic Eccentric Shaft maintains concentricity through induction hardening on critical contact areas, reducing scuffing even with extended oil service intervals. European distributors note consistent batch dimensions within ±0.008 mm, simplifying inventory management for professional trade.
On F30 platforms, fitting shops appreciate that this N20 Engine Eccentric Shaft aligns directly with the actuator pin and sensor wheel, requiring no custom spacers or re-machining. It restores progressive lift control, smoothing torque delivery from idle through mid-range where N20 turbos spool efficiently.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | BMW 11377630747 Eccentric Shaft |
| OE Part Numbers | 11377630747 |
| Engine Platform | BMW N20 |
| Engine Displacement | 2.0L Turbo |
| Camshaft Type | Valvetronic Eccentric Camshaft |
| Warranty | 12 months or 12,000 miles from the date of Ex-factory |
| Packing | Neutral Packing or Customer Required |
| MOQ | 5 pcs |
| Packing Quantity | 5 pcs per box |
| Place for Origin | Ningbo City of China |
| Brand | Wellgine |
Why Choose This Valvetronic Eccentric Camshaft for BMW 320i 328i F30 N20？
Choosing a direct replacement for BMW 11377630747 from our facility ensures you are bypassing trading company markups and dealing directly with the source of production.
- OEM-Level Hardening: Our BMW Valvetronic eccentric camshaft undergoes a specialized induction hardening process. This ensures the gear teeth withstand the constant torque from the actuator motor without premature pitting.
- Precision Tolerances: Every 11377630747 Valvetronic Eccentric Shaft is tested against the original master profile to ensure 1:1 compatibility with the Valvetronic sensor and needle bearings.
- Factory-Direct Supply: We operate our own production lines in China. While we do not hold local stock in Europe, our direct-from-factory logistics allow for competitive pricing for large-scale 11377630747 Balance Shaft orders.
- Quality Control: Each unit is individually inspected for micro-cracks and surface smoothness, reducing the risk of bearing galling which is a common failure point in aftermarket parts.
BMW Valvetronic Eccentric Camshaft – Function & Design
The BMW Valvetronic eccentric camshaft differs from conventional camshafts in that it does not control valve timing, but valve lift. By altering the pivot point of the intermediate lever, it enables fine adjustment of intake valve opening height across the engine’s operating range.
On N20 engines, the N20 Engine Eccentric Shaft must maintain consistent eccentric geometry to ensure smooth transition between low and high valve lift positions. Any deviation can affect combustion stability, especially at idle and low load.
FAQ
1. What are the common camshaft failure symptoms BMW N20 owners report?
Usually, it starts with a “Drivetrain Malfunction” warning, followed by hesitation during acceleration. If you inspect the 11377630747 Balance Shaft, you might see physical scoring on the gear teeth.
2. Is this a genuine BMW part?
This is an OEM-quality aftermarket replacement. It is manufactured to the same technical specifications as the original 11377630747 Eccentric Shaft to ensure perfect fitment and function.
3. Why is my engine making a clicking sound when I unlock the car?
This is often the Valvetronic motor trying to initialize against a worn or bound N20 engine eccentric balance shaft. Replacing the shaft is usually the only permanent fix.
4. Do you ship to European workshops from a local warehouse?
Currently, we ship all orders directly from our factory in China. This allows us to maintain strict quality control and offer the most competitive pricing for distributors.
5. What is the MOQ for international traders?
We support both small-batch orders for specialist engine rebuilders and large-scale procurement for international traders. Please contact us for a specific quote.
6. Can this part be replaced without changing the Valvetronic motor?
Yes. If the Valvetronic motor and sensor are functioning correctly, the 11377630747 Balance Shaft can be replaced independently. However, a full inspection of the motor and intermediate levers is recommended to avoid recurring faults.
7. Are there compatibility concerns with other BMW engines?
Yes. The eccentric shaft is engine-specific for N20 and is not compatible with N52 or N55 platforms. Installing the wrong shaft can result in incorrect intake valve lift, trigger Valvetronic fault codes, and potentially cause contact between valves and pistons. For professional workshops and rebuilders, always confirm the OE number and engine code before ordering. See the full specifications and installation details on the 11377630747 Eccentric Shaft for BMW N20 Valvetronic Engine product page.
8. Is this a direct replacement for BMW OE 11377630747?
Yes. Manufactured to OEM tolerances, it is a direct replacement that matches the original shaft’s geometry and is compatible with standard BMW Valvetronic components.
9. How should compatibility be verified before ordering?
Verify by OE number, engine platform (N20), and model year. For bulk purchases or distribution, confirm against production batch and part revisions to ensure dimensional match.
10. Do you offer technical support for professional installers?
Yes, we provide comprehensive technical support including installation guidance, torque specifications, timing procedures, and troubleshooting assistance. Our engineering team offers direct support to B2B partners to ensure successful installations and customer satisfaction.
11. How do I verify compatibility with specific engine codes?
Provide your vehicle’s VIN, model, year, and engine type, and we will verify compatibility free of charge to ensure you order the correct part.
12. What is your terms of delivery and payment?
EXW, FOB. Generally, 30% T/T deposit, and balance 70% T/T balance before delivery.
13. What is the ordering process and delivery time?
Please contact our sales team via the website or email for bulk pricing and quotations. Stocked items are shipped promptly, and special orders can be arranged with agreed delivery schedules.For the complete step-by-step ordering process, and our full terms, please view our Service Page.