Belt Tensioner - BMW 20702 is a belt or auxiliary drive part: it transmits torque between the engine and its accessories.
Correct tension is measured, not guessed by hand. An over-tight belt destroys alternator and pump bearings; a loose one slips, glazes and eventually breaks.
Specifications and compatibility
- Brand
- OEM
- Applicable to
- BMW N46 2.0L
- Country of origin
- China
How to verify before ordering
- Match the reference and the profile (for example 8PK, A, B) with the belt removed; nominal length is not enough if the profile differs.
- Inspect the pulleys before fitting: a burred or misaligned pulley eats a new belt in hours.
- On multi-belt drives, change them all together and keep the old one as an emergency spare.
- Declared origin: China. Check this if your purchase requires a specific origin.
Frequently asked questions
Can a belt of another size be used?
Only if profile and length match the specification. A shorter belt overloads the bearings; a longer one slips and stops driving the fan.
How often is tension checked?
At commissioning, at 50 hours and then at every service. On standby sets at least once a year, even without hours.
Related parts
See the spare parts catalogue or request a quotation quoting the equipment reference. Third-party trademarks are cited for identification purposes only.
Specifications
| Characteristics | |
|---|---|
| Brand | OEM, OSSCA |
| Country of Origin | China |
| Applicable To | BMW N46 2.0L |
| Spare Parts | |
|---|---|
| Engine parts | Other |
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