S50 Timing Chain Tensioner (Upgrade for M50)(11311405081) m52tu M40/42/43 Idle control valve

M40/42/43 Idle control valve

The main crank sprocket on M5x motors tends to wear out over time with the chain removing material from the teeth of the sprocket which can cause issues with chain retention

Performance Tune:

please add 2 units to cart to receive a pair

S50 Timing Chain Tensioner (Upgrade for M50)(11311405081) m52tu M40/42/43 Idle control valveReplacement timing chain tensioner by Febi Bilstein to suit BMW S50 engines using the aluminium backed chain guide (this will not work on the plastic backed guide, for those motors use the S54 tensioner we sell HERE) This item is also an upgrade for M50 engines that use the aluminium backed main timing guide.