Bilstein B4 Rear Shock Absorber Damper 19-304472 for BMW Z4 G29 (2018-on) & Toyota GR Supra Mk5 A90/A91 (2019-on) - OEM OE Replacement Gas-Pressure Twin-Tube Rear Suspension Shock - Fits Z4 sDrive20i sDrive30i M40i, Supra 2.0 3.0 GR

Bilstein B4 19-304472 Rear Suspension Damper for BMW Z4 G29 and Toyota GR Supra A90 A91

Bring back the crisp, planted feel of your rear axle with the Bilstein B4 rear suspension damper, part number 19-304472. This OEM-spec, gas-charged twin tube shock is a direct-fit replacement that restores stability, comfort and control on BMW Z4 G29 models and the Mk5 GR Supra. Ideal for daily road use and spirited driving, it delivers the confident ride quality drivers expect from Bilstein without adding harshness.

At MJ Modifications we run these on customer cars and feedback has been superb. Owners report tighter body control, improved traction and that fresh-from-factory precision. It bolts straight on to the original rear mounts and works perfectly with standard springs, making it a straightforward, no-drama refresh for tired rear shocks.

Key benefits

• Direct-fit rear damper for BMW G29 Z4 and Toyota GR Supra A90 A91
• Gas-charged twin tube design for consistent damping and dependable road holding
• OEM-level quality and reliability for long-term peace of mind
• Restores ride comfort, steering response and rear-end composure
• Engineered to work with factory springs and OE top mounts
• Great for daily driving and fast road use in all weather conditions

Vehicle applications

BMW

• Z4 G29 2018 onwards
  • sDrive20i
  • sDrive30i
  • M40i

Toyota

• GR Supra A90 and A91 2019 onwards
  • 2.0
  • 3.0
  • GR

Technical details

• Position: rear axle
• Type: gas charged
• System: twin tube
• Mounts: bottom eye, top pin
• Spring support: absorber does not carry a spring

Why this upgrade

• Restores that new-car feel with predictable handling and enhanced safety reserves
• Stable damping performance under load for confident cornering and braking
• OEM-spec construction for plug-and-play installation
• Excellent value suspension refresh for Z4 and GR Supra owners

Fitting and support

Professional installation recommended. MJ Modifications can supply and fit in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk. For balanced handling we advise replacing rear dampers in axle pairs.

Compatibility check

We verify fitment before dispatch. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm the correct part for your vehicle.

Part numbers

Bilstein reference: 19-304472

EAN: 4025258849061

UPC: 651860857169

Search terms customers use

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