Bilstein B4 Rear Shock Absorber / Damper 19-227641 for BMW 6 Series F12 F13 (2011-2018) Coupe & Convertible - Fits 640i 650i 640d incl xDrive - OE Spec Gas Twin-Tube Rear Shocker/Strut Replacement

Bilstein B4 Rear Damper Unit for BMW 6 Series F12 and F13 - Part No. 19-227641

Refresh the rear suspension on your BMW 6 Series Coupe or Convertible with the Bilstein B4 rear damper, part number 19-227641. This factory-spec replacement brings back that tight, controlled feel and the plush ride you expect from a well-sorted 6 Series. If the back end feels bouncy, wallowy or unsettled, this gas-charged twin-tube unit restores confidence, comfort and stability in one straightforward bolt-on.

Why this Bilstein B4 makes a difference

• Direct-fit rear damper that matches original ride height and geometry for a simple, stress-free install
• Gas-charged twin-tube design for consistent control on rough roads, motorways and B-roads
• Calm, composed ride with improved body control, traction and braking stability
• Built to OE standards by Bilstein, a trusted name in performance suspension
• Perfect for daily driving, touring and fast road use without compromising comfort

Vehicle coverage

Designed for the rear axle on the following BMW models:

• BMW 6 Series F12 Convertible - 640i, 650i, 640d
• BMW 6 Series F13 Coupe - 640i, 640i xDrive, 650i, 650i xDrive, 640d, 640d xDrive

Unsure it suits your car? We offer a free fitment check. Add your UK registration or the last 7 digits of your VIN at checkout and we will verify compatibility before dispatch.

Technical information

• Location: Rear axle
• Construction: Twin-tube, gas-charged
• Style: Spring-bearing damper
• Mounts: Bottom eye, top pin

Proven on customer cars

We have fitted this Bilstein B4 to multiple customer 6 Series builds and the feedback is consistently excellent. Drivers report a smoother ride, tighter rear end control and a more planted feel at speed with OE-level fit and finish.

Professional installation

Want expert fitting? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability. We recommend replacing dampers in pairs on the same axle and checking wheel alignment after installation.

Part numbers and identifiers

• Bilstein Part Number: 19-227641
• EAN: 4025258720087
• UPC: 651860720586

Search-friendly terms customers use

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Compatibility check before dispatch

To make sure you receive the correct damper, simply provide your UK reg or last 7 of the VIN at checkout and we will confirm the match before we ship.