Guangzhou Yuanfenghang Automotive Parts Co., Ltd
| Payment Terms | L/C,D/A,MoneyGram,D/P,T/T,Western Union |
| Supply Ability | 5000 |
| Delivery Time | 5-15Days |
| Packaging Details | Cardboard box or Wooden box |
| Part Number | 1131 7621 103 |
| Product Name | Engine Timing Chain Tensioner |
| Brand Name | Czechdes |
| Model Number | N55/N20 |
| Certification | ISO CE |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,D/A,MoneyGram,D/P,T/T,Western Union | Supply Ability | 5000 |
| Delivery Time | 5-15Days | Packaging Details | Cardboard box or Wooden box |
| Part Number | 1131 7621 103 | Product Name | Engine Timing Chain Tensioner |
| Brand Name | Czechdes | Model Number | N55/N20 |
| Certification | ISO CE | Place of Origin | China |
| High Light | Hydraulic bmw 540i timing chain tensioner ，OEM bmw 540i timing chain tensioner ，11317621103 | ||
The BMW 1131 7621 103 is an OEM or OEM-equivalent timing chain tensioner designed for BMW engines. Its primary function is to maintain proper tension in the timing chain, preventing issues such as slack, misalignment, or skipped timing, which could lead to severe engine damage (e.g., valve-to-piston interference in interference engines).
| Attribute | Specification |
|---|---|
| Part Number | BMW 1131 7621 103 (OEM) |
| Type | Hydraulic Timing Chain Tensioner |
| Material | Aluminum body with steel piston |
| Oil Pressure Dependency | Yes (requires engine oil pressure) |
| Spring Preload | Integrated mechanical spring |
| Weight | ~0.5 kg (varies by design) |
| Operating Temperature | -40°C to +150°C (-40°F to 302°F) |
| Replacement Interval | 100,000–150,000 miles (inspect annually) |
| Compatible Fluids | BMW-approved 5W-30/5W-40 synthetic oil |
(Always verify with VIN before purchase/installation)
| Engine Code | BMW Model Series | Production Years | Displacement |
|---|---|---|---|
| N20 | F30 (3 Series), F10 (5 Series) | 2011-2017 | 2.0L Turbo (4-cyl) |
| N55 | F20 (1 Series), F30 (3 Series) | 2010-2016 | 3.0L Turbo (6-cyl) |
| N26 (SULEV) | F25 (X3), F30 (3 Series) | 2012-2017 | 2.0L Turbo (4-cyl) |
| B48* | G20 (3 Series), G30 (5 Series) | 2017-Present* | 2.0L Turbo (4-cyl) |
| *May require verification for B-series engines |
Function:
Automatically adjusts timing chain tension to compensate for wear or thermal expansion.
Reduces vibration and noise from chain operation, improving engine smoothness.
Prevents chain slippage, avoiding catastrophic engine damage.
Working Principle:
Typically uses a hydraulic or spring-mechanical mechanism:
Hydraulic types rely on engine oil pressure to push a piston against the chain guide.
Spring-loaded types use mechanical pre-tension.
Some BMW engines (e.g., N20/N55) may integrate electronic monitoring for precise tension control.
A typical timing chain tensioner consists of:
Piston: Contacts the chain guide to apply tension.
Spring mechanism: Provides initial preload.
Hydraulic chamber (if applicable): Uses engine oil pressure for dynamic adjustment.
Check valve: Prevents oil drain-back, ensuring consistent tension.
Chain rattling: "Ticking" noise at cold start (low oil pressure or stuck piston).
Check Engine Light: Timing correlation codes (e.g., P0016).
Power loss/misfires: Chain jump due to excessive slack.
Oil leaks: Worn tensioner seals.
When to Replace:
During timing chain service (e.g., full timing kit replacement).
If symptoms appear or as preventive maintenance (recommended every 100k–150k miles for some BMW engines).
Key Notes:
Requires timing tools for proper alignment.
Post-installation oil pressure check is critical for hydraulic tensioners.
Recommended parts to inspect/replace together:
Timing chain
Chain guides
Sprockets
Oil pump (ensure adequate pressure)
Company Details
Business Type:
Manufacturer
Total Annual:
5000000-10000000
Employee Number:
100~150
Ecer Certification：
Active Member
Guangzhou Yuanfenghang Auto Parts Co., Ltd. is a professional manufacturer and wholesaler specializing in high-end automotive parts, focusing on providing genuine and premium aftermarket parts for luxury brands such as Mercedes-Benz, BMW, Land Rover, and Jaguar. With over 138 employees, the compa... Guangzhou Yuanfenghang Auto Parts Co., Ltd. is a professional manufacturer and wholesaler specializing in high-end automotive parts, focusing on providing genuine and premium aftermarket parts for luxury brands such as Mercedes-Benz, BMW, Land Rover, and Jaguar. With over 138 employees, the compa...
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