Bilstein 12-251377 Suspension Strut Mount - Front

Bilstein B1 OE Replacement Suspension Strut Mount

The Bilstein B1 OE Replacement suspension strut mount, part number 12-251377, is a direct replacement component for front suspension service on select BMW applications. It is built to keep the strut securely located while supporting long-term suspension operation on vehicles such as the BMW 320i, 328i, 335i, 428i, and M235i.

Key Features

• Direct replacement suspension strut mount for OE-style service
• Bilstein B1 OE Replacement series component
• Helps keep the front strut firmly positioned in the suspension assembly
• Supports suspension longevity when replacing worn OE parts
• Applicable to front-position BMW fitments from 2013-2016
• Part number 12-251377 for catalog and cross-reference lookup

Product Details

Bilstein’s B1 OE Replacement line focuses on direct replacement suspension components for everyday repair work. This strut mount is part of that series and is used to restore proper front suspension support on BMW models with the correct OE mount configuration. The design is intended to replace worn mounting points that can contribute to noise, movement, or reduced suspension stability. This part number 12-251377 is listed for front applications on 2013-2016 BMW 228i, 320i, 328d, 328i, 335i, 428i, 435i, ActiveHybrid 3, M235i, and related xDrive and Gran Coupe variants with the specified OE setup.

This part cross-references OE numbers 31 30 6 855 818 and 31 30 6 863 135 for the same application.

What It Helps Address

• Front suspension noise caused by a worn strut mount
• Excess strut movement at the mounting point
• Reduced suspension support from aging OE components
• Service needs on BMW front strut assemblies with OE mount configurations
• Replacement of damaged or deteriorated suspension mounting hardware

Installation Notes and Fitment

Compatible With front suspension applications only. Fitment includes 2016 BMW 228i xDrive, 335i GT xDrive, 428i, 428i Gran Coupe, 428i xDrive, 428i xDrive Gran Coupe, 435i, 435i Gran Coupe, 435i xDrive, and 435i xDrive Gran Coupe with a 3-hole OE mount; 2014-2016 BMW M235i without electronic suspension; 2014-2015 BMW 228i, 228i xDrive, 320i, 320i xDrive, 328d, 328d xDrive, 328i, 328i GT xDrive, 328i xDrive, 335i, 335i GT xDrive, 335i xDrive, 428i, 428i xDrive, 435i, 435i xDrive, and ActiveHybrid 3 without electronic suspension; 2015 BMW 428i Gran Coupe, 428i xDrive Gran Coupe, 435i Gran Coupe, 435i xDrive Gran Coupe, and M235i xDrive without electronic suspension; and 2013 BMW 320i, 320i xDrive, 328i, 328i xDrive, 335i, 335i xDrive, and ActiveHybrid 3 from 05/2013. Verify OE mount style and suspension configuration before installation. Professional suspension service is recommended for proper alignment and assembly inspection.

Quality Assurance

Bilstein manufactures the B1 OE Replacement line as direct replacement suspension parts for OE-style service and long-term suspension support. The product is engineered to meet the needs of factory-style repair on the listed BMW applications.