Original BMW Timing Chain Tensioner Spring for BMW 3 Series, 5 Series, M3, X3, X5, Z3, and Z4 (1991–2006)

BMW part 11-41-1-706-809 is a 20 g coil spring that loads the lower timing chain tensioner on M40, M42, M43, M44, M50, M52, M54, and M56 engines, plus the S50 and S52, in BMW 3 Series, 5 Series, M3, X3, X5, Z3, and Z4 models built from 1991–2006. It sits at the lower part of the timing chain and keeps pressure on the tensioner while still allowing a set amount of tolerance for play. BMW names it simply a coil spring, and production of this number began in September 1987. It is made in Germany and sold individually.

Original BMW Parts carry a 24-month parts warranty.

A tensioner spring adds mechanical preload so the chain guide stays in contact with the chain as it runs. Because BMW kept this one spring across several engine generations, it appears in the E30, E36, and E46 3 Series, the E34 and E39 5 Series, the E83 X3, the E53 X5, the Z3, and the E85 Z4. Signs that the timing system needs attention include a rough start, misfiring, a rattling noise, oil smoke from the exhaust, and poor engine performance.

Technical Details

• Manufacturer: BMW (Original BMW Parts)
• Part number: 11-41-1-706-809
• BMW name: coil spring
• Application: lower timing chain tensioner
• Weight: 20 g (0.71 oz)
• Production start: September 1987
• Made in Germany
• Sold as: single spring
• Warranty: 24 months

Common Questions

Where does this spring sit?
On the lower part of the timing chain, keeping pressure on the tensioner.

Does it fit both four- and six-cylinder engines?
Yes. BMW uses it on four-cylinder M40, M42, M43, and M44 engines and on six-cylinder M50, M52, M54, S50, and S52 engines.

How many come in an order?
One spring per order.

Talk to PMB Performance when you are sourcing the rest of your BMW timing parts.

Fitment & Compatibility

Use the fitment table below to confirm the exact year, make, model, submodel, and any application notes before ordering. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.