1999-2005 E46 chassis
 







Big news for owners of E46 3-series/M3, E39 5-series/M5, and Z8!

Many owners of these cars have experienced mushy clutch feel, inconsistent engagement, and premature wear of the clutch in their manual-transmission cars. The reason is quite simple - the original BMW (LUK-manufactured) clutch has a new "SAC" (Self Adjusting Clutch) design. This new mechanism built into the pressure plate is supposed to keep the clutch pedal engagement point the same as the clutch wears... but in all reality, it's a case of "an answer to a question that nobody was asking." They have added a layer of complexity and feedback isolation, filling a need that didn't need filling - it is not too often that anybody notices that their clutch engagement point as moved 1/2" over 50K miles.


The SAC mechanism itself causes problems; it over- or under-adjusts the pressure plate and therefore causes the clutch to slip or burn out prematurely. They are also known to shift, causing the pressure plate release fingers to slip off the plate, keeping 1/3 of the pressure plate engaged at all times. Bottom line is that the only fix is a complete clutch job, and your dealer is likely to claim "driver abuse". We have seen it happen too many times.

The SAC mechanism may not give a clean release like a standard clutch. Instead of just two sets of springs, there is an adjuster mechanism that makes engagement feel mushy or slow.

All UUC Performance Clutches for these models use an all-new design pressure plate that does not have the SAC mechanism. The resulting improvement in feel is immediate - the clutch is easy to modulate and is consistent, regardless of temperature. Additionally, the reliability and lifespan of the clutch are enhanced. The UUC clutch eliminates the SAC mechanism and restores traditional clutch feel with predictable and crisp engagement.



All clutches are "direct fit" and require no modifications. Normal installation procedures apply.






 
 
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