3M517A564BH Flat Connector Hydraulic Clutch Release Bearing

CRB-028

Sourcing teams working with Ford or Mazda platforms will likely run into this part number at some point, since it's one of the most widely cross-referenced release bearings in the current lineup. Known as the 3M517A564BH Flat Connector Hydraulic Clutch Release Bearing, it's also called a concentric slave cylinder (CSC) in the industry, combining the release bearing and hydraulic cylinder into a single unit instead of relying on the older mechanical fork and separate bearing setup.

What makes the 3M517A564BH Flat Connector Hydraulic Clutch Release Bearing stand out from other release bearings is its terminal shape. Instead of a round or angled connector, the hydraulic port on this part is built as a flat, paddle-style connector that sits flush against the housing. This shape matches the tighter mounting clearance found across a wide range of Ford and Mazda platforms, so the hydraulic line connects cleanly without extra bending or forcing during installation.

Core Function
Converting hydraulic pressure into push force to disengage the clutch remains the primary role of this component, same as any hydraulic release bearing on the market. What sets it apart functionally is the flat connector design, which reduces the risk of interference with nearby components in tighter bell housing layouts, something that's common across the Focus, C-Max, Mondeo, and Transit Connect platforms this part covers. 

A two bolt mounting flange keeps the installation footprint compact, which suits the narrower mounting area found on several of the applicable models. The bearing rotates concentrically with the input shaft, keeping wear distributed evenly across the sealing surface, and the housing material is built to hold up against the heat and moisture typically found in this part of the engine bay.

Problems This Part Solves for Buyers
Fitment confusion across shared platforms comes up frequently with this 3M517A564BH Flat Connector Hydraulic Clutch Release Bearing, since it's cross-referenced under more than 20 different OE numbers spanning Focus Mk2, Focus Mk3, Mondeo Mk4, S-Max, Galaxy Mk2, Transit Connect, and Mazda 3, among others. 

Tight installation clearance is another common issue with standard round-port release bearings, particularly on compact platforms like Focus C-Max and Transit Connect where engine bay space is limited. The flat connector shape on this part addresses that directly by keeping the terminal profile low and flush.

Inconsistent quality from unverified suppliers is a recurring concern for distributors sourcing parts at scale. Working with a factory-direct supplier that documents OE cross-references and maintains consistent production standards helps reduce the chance of leaks, poor sealing, or premature bearing wear once the part is in use.