What does the 0.025mm oversized dimension mean for my engine?

The 0.025mm oversized dimension indicates these bearings are intended for use when the crankshaft journals have been machined undersize during an engine rebuild. This size helps restore the proper oil clearance between the bearing and the crankshaft.

Are these bearings suitable for a stock S54 engine rebuild?

These are high-performance bearings and are specifically sized at 0.025mm oversized. They are best suited for engines where the crankshaft has been machined to accept this size. For a completely stock rebuild without journal machining, you would typically need standard size bearings.

What is the typical lifespan of these rod bearings?

The lifespan of engine bearings depends heavily on proper installation, consistent oil changes with the correct oil type, and driving conditions. ACL bearings are well-built, but premature wear can occur if oil clearances are incorrect or lubrication is inadequate.

ACL BMW S54B32 0.025mm Oversized High Performance Rod Bearing Set

Specifications

Brand: ACL
Part #: 6B1569H-.025
UPC: 9315726440582

ACL BMW S54B32 0.025mm Oversized High Performance Rod Bearing Set

Name: ACL BMW S54B32 0.025mm Oversized High Performance Rod Bearing Set
Brand: ACL
Price: 142.17 USD
Availability: InStock

$142.17

On Backorder — Expected to ship by Apr 11, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2001-2008 BMW M3, Z3, Z4. ACL 0.025mm oversized rod bearings for improved engine performance.

Key Features

Fits 2001-2008 BMW M3, Z3, and Z4.
ACL high-performance rod bearing set.
Features a 0.025mm oversized dimension for machined crankshafts.
Designed for the BMW S54B32 engine.
Well-built to handle demanding engine conditions.

Secure CheckoutFast Shipping631-982-0042

Fits these vehicles

BMW M3 2001-2006
BMW Z3 2001-2002
BMW Z4 2006-2008

Product Details

This kit includes a full set of ACL high-performance rod bearings, specifically sized at 0.025mm oversized for your BMW S54B32 engine. When you're rebuilding or refreshing an engine, especially one known for its performance like the S54, using the right bearings is crucial for longevity and optimal function. These bearings are built to handle the demands of a high-revving, performance-oriented motor, helping to maintain proper oil clearance and reduce friction.

ACL has a solid reputation for making well-built engine components, and these rod bearings are no exception. They are manufactured to tight tolerances, ensuring they fit right and perform as expected. The 0.025mm oversized dimension is important if your crankshaft journals have been machined undersize during a rebuild; these bearings will bring the clearance back into the correct specification. Using the correct size bearing is key to ensuring proper oil flow and preventing premature wear.

If you're working on your BMW M3, Z3, or Z4 and need reliable engine internals, this set from ACL is a popular choice. Make sure to check your crankshaft journal dimensions to confirm that the 0.025mm oversized size is appropriate for your specific rebuild needs. Proper installation according to manufacturer guidelines is essential for achieving the best results.