Sachs SH5621 Clutch Master Cylinder

Sachs SH5621 Clutch Master Cylinder

The Sachs SH5621 clutch master cylinder is an OE-quality replacement built for BMW manual transmission systems. It is application matched for OE form, fit, and function, with a 19 mm bore, plastic construction, and a remote reservoir style layout.

Compatible with a wide range of BMW M3, M4, M2, 3 Series, 4 Series, Z4, X3, X5, and related manual transmission applications, this clutch master cylinder supports consistent hydraulic clutch operation. The SH5621 part number is also a useful reference when verifying the correct replacement for your vehicle.

Key Features

• OE-quality clutch master cylinder for BMW manual transmission components
• Application matched for OE form, fit, and function
• 19 mm bore diameter for hydraulic clutch operation
• Plastic housing with single outlet design
• Male connector gender
• Push rod included
• Remote reservoir style
• No hose, reservoir, mounting hardware, or pre-filled fluid included

Detailed Description

The Sachs SH5621 is a clutch master cylinder engineered for BMW vehicles that use a hydraulic manual clutch system. It is built to match original equipment dimensions and connection points, helping maintain proper pedal feel and hydraulic response. This part number, SH5621, cross-references BMW OE numbers 21 52 1 163 899 and 21 52 6 758 822 for the same application.

Fitment includes 2023-2024 BMW M2, 2021-2024 BMW M3, 2015-2024 BMW M4, 2017-2021 BMW 230i, 2017-2021 BMW M240i, 2017-2020 BMW 430i, 2019-2020 BMW 430i Gran Coupe, 2017-2019 BMW 440i, 2017-2019 BMW 440i xDrive, 2013-2018 BMW 320i, 2017-2018 BMW 330i, 2001-2006 BMW 330i, 2016-2018 BMW 340i, 2016-2018 BMW 340i xDrive, 2014-2016 BMW 228i, 2015-2016 BMW 228i xDrive, 2007-2016 BMW 328i, 1999-2000 BMW 328i, 2014-2016 BMW 428i, 2014-2016 BMW 435i, 2014-2016 BMW 435i xDrive, 2014-2016 BMW M235i, 2015-2016 BMW M235i xDrive, 2006-2016 BMW Z4, 2007-2015 BMW 335i, 2009-2015 BMW 335i xDrive, 2008-2013 BMW 128i, 2008-2013 BMW 135i, 2009-2013 BMW 328i xDrive, 2011-2013 BMW 335is, 2011 BMW 1 Series M, 2004-2010 BMW X3, 2007-2008 BMW 328xi, 2007-2008 BMW 335xi, 2001-2006 BMW 325Ci, 2001-2006 BMW 325i, 2001-2006 BMW 325xi, 2001-2006 BMW 330Ci, 2001-2006 BMW 330xi, 2004-2006 BMW M3, Exc.Sequential Shift Trans, 2001-2006 BMW X5, 2003-2005 BMW Z4, Exc.Sequential Shift Trans, 2001-2003 BMW 525i, 2001-2003 BMW 530i, 1998-2003 BMW 540i, 2000-2003 BMW M5, 2000-2003 BMW Z8, 2000 BMW 323Ci, 1999-2000 BMW 323i, 2000 BMW 328Ci, and 1998-2000 BMW 528i.

Common Uses

• Restores clutch hydraulic pressure after master cylinder wear
• Addresses soft, inconsistent, or sinking clutch pedal feel
• Helps correct fluid leakage at the clutch master cylinder
• Supports proper clutch disengagement on manual BMW applications
• Replaces a worn OE-style hydraulic master cylinder during transmission service

Installation Notes and Tips

Verify the bore diameter, connector style, and reservoir configuration before installation. This unit uses a remote reservoir setup, includes a push rod, and does not include a hose, reservoir, mounting hardware, or pre-filled fluid. Bleed the hydraulic system thoroughly after installation and confirm pedal travel and clutch engagement before returning the vehicle to service.

Quality Assurance

Sachs supplies OE-quality hydraulic components matched to original equipment form, fit, and function. The SH5621 is built for direct replacement use in BMW manual transmission applications and is backed by Sachs product quality standards.