Bilstein B4 OE Replacement Rear Shock Absorber — Fits 2012-2021 BMW 3 Series & 4 Series

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SKU: BIL20-238933

About Bilstein Bilstein has been the OE shock supplier to ...Read more

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Sale price$409.00 Regular price$436.00
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Bilstein

Bilstein has been the OE shock supplier to Mercedes-Benz, BMW, Porsche, and Ferrari since 1957. German-engineered B4 OE replacements, B6 sport, B8 lift-corrected, and B14/B16 coilovers — every Bilstein damper carries motorsport-derived monotube technology.

Watch in action

Restore Your BMW’s Dynamic Handling

The Bilstein B4 OE Replacement rear shock absorber is designed to restore the precise handling and comfort that your BMW was famous for when it left the factory. Whether you drive a 3 Series or a 4 Series, these shocks are engineered to meet the exact requirements of your vehicle's suspension system. Bilstein is a world leader in suspension technology, and the B4 series provides the perfect balance of performance and reliability for daily driving.

Why Choose Bilstein B4 Shocks?

  • OE Quality: Manufactured to match or exceed the original equipment specifications for your BMW.
  • Twin-Tube Design: Provides consistent damping performance and comfort across all road conditions.
  • Precision Engineering: Specifically tuned for the chassis dynamics of the F30, F32, and related BMW platforms.
  • Longevity: High-quality components ensure a long service life, even under demanding driving conditions.

Driving a BMW is all about the connection between the driver and the road. If your rear shocks are worn, you lose that connection, resulting in a floaty ride and reduced stability. By installing Bilstein B4 shocks, you are ensuring that your vehicle's suspension is working at its peak, providing the control and comfort you expect. These shocks are a direct fit, making the installation process straightforward for both DIY enthusiasts and professional mechanics. Don't settle for aftermarket alternatives that compromise your BMW's performance; choose the standard in OE replacement technology. Experience the ultimate driving machine as it was meant to be with quality parts from GGCRACING.

About Bilstein

Bilstein has been the OE shock supplier to Mercedes-Benz, BMW, Porsche, and Ferrari since 1957. German-engineered B4 OE replacements, B6 sport, B8 lift-corrected, and B14/B16 coilovers — every Bilstein damper carries motorsport-derived monotube technology.

Watch in action

Restore Your BMW’s Dynamic Handling

The Bilstein B4 OE Replacement rear shock absorber is designed to restore the precise handling and comfort that your BMW was famous for when it left the factory. Whether you drive a 3 Series or a 4 Series, these shocks are engineered to meet the exact requirements of your vehicle's suspension system. Bilstein is a world leader in suspension technology, and the B4 series provides the perfect balance of performance and reliability for daily driving.

Why Choose Bilstein B4 Shocks?

  • OE Quality: Manufactured to match or exceed the original equipment specifications for your BMW.
  • Twin-Tube Design: Provides consistent damping performance and comfort across all road conditions.
  • Precision Engineering: Specifically tuned for the chassis dynamics of the F30, F32, and related BMW platforms.
  • Longevity: High-quality components ensure a long service life, even under demanding driving conditions.

Driving a BMW is all about the connection between the driver and the road. If your rear shocks are worn, you lose that connection, resulting in a floaty ride and reduced stability. By installing Bilstein B4 shocks, you are ensuring that your vehicle's suspension is working at its peak, providing the control and comfort you expect. These shocks are a direct fit, making the installation process straightforward for both DIY enthusiasts and professional mechanics. Don't settle for aftermarket alternatives that compromise your BMW's performance; choose the standard in OE replacement technology. Experience the ultimate driving machine as it was meant to be with quality parts from GGCRACING.

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