Bilstein B1 12-224425 (BILSTEIN-12-224425) Front Strut Top Mount/Support Bearing for BMW 5 Series E39 535i 540i V8 & BMW Z8 E52 4.9 – Front Shock Absorber Mount, Upper Strut Support, OE Replacement

Bilstein B1 Upper Strut Bearing for BMW E39 V8 and BMW Z8 E52

Part number: BILSTEIN-12-224425 | Alt ref: 12-224425

Bring back precise steering, quiet operation and a planted front end with this genuine Bilstein B1 upper bearing plate for the front assembly. Tailored for BMW 5 Series E39 V8 models 535i and 540i, and the BMW Z8 E52 4.9, it is the OE-spec solution enthusiasts choose when refreshing the front suspension, curing knocks and sharpening feedback at the wheel. Expect factory-level fit, robust construction and long service life from a brand trusted on road and track.

At MJ Modifications we install these regularly on customer cars and our own builds. The result is consistently the same: tighter steering, reduced play under braking, smoother articulation over bumps and a noticeable drop in unwanted NVH. It is the ideal partner for fresh dampers and springs, or as a targeted fix for tired original mounts.

Why this Bilstein B1 is the right choice

• Vehicle-specific front fitment for BMW E39 535i, BMW E39 540i and BMW Z8 E52 4.9
• OE-grade materials and geometry for reliable alignment and consistent handling
• Restores steering accuracy, improves on-centre feel and reduces tramlining
• Helps eliminate clunks, creaks and excess movement in the MacPherson assembly
• Perfect during a front-end refresh, damper upgrade or preventative maintenance

Position

Front end fitment, upper mount for the MacPherson strut assembly.

Typical wear symptoms

• Knocking noises over potholes or speed humps
• Vague turn-in and poor steering return
• Uneven tyre wear and tracking issues
• Vibration felt through the steering wheel

Fits

• BMW 5 Series E39 535i
• BMW 5 Series E39 540i
• BMW Z8 E52 4.9

Search-friendly terms customers use

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Compatibility check

Want us to double-check fitment before dispatch? Add your UK registration or last 7 of the VIN at checkout and we will confirm this part suits your exact vehicle.

Professional installation

For fitting, choose MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and scheduling.

Technical details

• Brand: Bilstein
• Series: B1
• Part number: BILSTEIN-12-224425
• Position: Front
• EAN:4025258706500
• UPC: 651860706009

Choose proven Bilstein hardware for a front end that feels tight, quiet and confidence inspiring. This is the go-to replacement for BMW E39 535i and 540i owners, and Z8 drivers seeking durable, OE-level performance with crisp steering and long-term reliability.