Bilstein 20-303334 B4 DampTronic Rear Shock Absorber - OE Replacement for BMW 3 Series G20 Saloon/G21 Touring, M3 G80/G81 & 2 Series G42 - EDC/Adaptive Electronic Suspension Rear Damper

Rear Damper Unit for BMW G20 G21 G80 G81 G42 - Bilstein B4 DampTronic 20-303334

Refresh the rear end of your BMW with Bilstein’s B4 DampTronic rear damper, part number 20-303334. This direct-fit unit is designed for cars equipped with electronically adjustable damping, delivering the same calibration, control and refinement you expect from original equipment. Enjoy confident handling, composed ride quality and dependable stability on British roads with a premium OE-spec solution that simply plugs in to your adaptive system.

Built around Bilstein’s proven gas-pressure twin-tube architecture, this electronically controlled rear damper provides consistent performance, precise body control and excellent traction. Perfect for restoring an as-new feel on daily drivers and performance models alike, including xDrive and plug-in hybrid variants.

Why this Bilstein unit is the smart choice

• Direct-fit for cars with electronic damping control - no coding required in typical applications
• Original equipment quality with factory-matched valving for comfort and control
• Stable performance under load for confident cornering and braking
• Twin-tube gas technology for composure on poor surfaces and B-roads
• Engineered for long-term reliability with OE-grade materials and fittings

Vehicle coverage

For BMW models with electronically adjustable suspension. Rear axle fitment.

• 2 Series Coupe G42 - 08.21 onward
  • 218i, 220i, 220d MHEV, M240i xDrive
• 3 Series Saloon G20 and M3 G80 - 11.18 onward
  • 318i, 320i including 1.6, 320i xDrive, 330i, 330i xDrive, M340i, M340i xDrive
  • 316d, 318d, 320d, 320d xDrive, MHEV derivatives
  • 330d, 330d xDrive, M340d xDrive MHEV
  • 320e and 330e plug-in hybrid including xDrive
• 3 Series Touring G21 and M3 Touring G81 - 07.19 onward
  • 318i, 320i, 330i, 330i xDrive, M340i xDrive
  • 316d, 318d, 320d, 320d xDrive, 330d, 330d xDrive, MHEV variants
  • 320e and 330e plug-in hybrid including xDrive

Technical details

Fitment check

We verify compatibility before dispatch. Add your UK registration or the last 7 of your VIN at checkout so we can confirm the correct damper for your exact model, drivetrain and suspension specification.

Professional installation

Want it fitted by specialists? MJ Modifications in Warwickshire can install and set up your suspension. Request a quote at info@mjmodifications.co.uk.

Part identifiers

• Bilstein reference: 20-303334
• SKU: BILSTEIN-20-303334
• EAN: 4025258871765
• UPC: 651860878867

What you gain

Restore precise road holding, reduce bounce and improve ride refinement with an OE-grade electronic rear damper that integrates seamlessly with your adaptive chassis. Ideal as a like-for-like replacement for worn units on BMW 3 Series G20 G21, M3 G80 G81 and 2 Series G42 models equipped with adaptive damping.

Popular searches

BMW adaptive rear damper G20, BMW G21 electronic damper unit, BMW G42 rear strut electronic, BMW M3 G80 adjustable shock rear, Bilstein B4 electronic rear damper, BMW 3 Series variable damping rear, EDC compatible rear shocker, BMW G80 G81 adaptive M suspension rear unit, OE spec BMW rear damper electronic, direct fit BMW rear shock G20 G21, BMW PHEV rear damper electronic, BMW xDrive rear electronic damper, Bilstein 20 303334 rear, BILSTEIN-20-303334 rear unit.