Bilstein 20-303426 B6 DampTronic Rear Shock Absorber - BMW G20/G21 3 Series, G42 2 Series, G81 (M3 Touring) - EDC/Adaptive Suspension Compatible OE-Plus Performance Damper

Bilstein 20-303426 Rear Suspension Damper for BMW G20 G21 G42 G81 with electronic damping

Looking for a direct-fit rear suspension upgrade that keeps your factory electronic damping fully functional and tightens up the way your BMW drives. The Bilstein 20-303426 rear damper is the premium OE-grade performance replacement for G20 and G21 3 Series, G42 2 Series Coupe and G81 M3 Touring models equipped with BMW’s electronically controlled damping systems. It delivers sharper body control, crisper turn-in and superb high-speed stability while preserving everyday comfort.

We use these on our own cars and customer builds and the feedback is consistently positive. Expect a more planted rear end, improved traction in wet and dry conditions and a ride that feels fresh without the harshness you get from some aftermarket shocks.

Why this rear damper is a winning upgrade

• Plug-and-play with BMW electronic damping and Adaptive M settings - no coding required.
• Gas-pressure twin-tube design for precise control and reduced fade under fast road use.
• OE-plus ride quality with noticeably better composure over bumps and during lane changes.
• Ideal for daily driving, motorway mileage, spirited B-road runs and loaded trips.
• Works with your original rear springs - no need to change coil springs to feel the improvement.
• Each unit is road-tested and tuned by Bilstein for real-world conditions.

Vehicle fitment - BMW applications with factory electronic damping

• BMW 2 Series Coupe G42 08/2021 onwards
  • 218i, 220i, 230i, M240i xDrive
• BMW 3 Series Saloon G20 11/2018 onwards
  • 318i, 320i 1.6, 320i, 320i xDrive, 330i, 330i xDrive, M340i, M340i xDrive, 320e PHEV, 330e PHEV, 330e xDrive PHEV, 316d, 318d, 320d, 320d xDrive, 330d, 330d xDrive including applicable mild-hybrids
• BMW 3 Series Touring G21 and G81 07/2019 onwards
  • 320i, 330i, 330i xDrive, M340i xDrive, 320e PHEV, 320e xDrive PHEV, 330e PHEV, 330e xDrive PHEV, 316d, 318d, 320d, 320d xDrive, 330d, 330d xDrive including applicable mild-hybrids

Tip: for balanced handling and braking under load, replace rear dampers in pairs.

Technical details

• Position: rear axle
• Type: gas pressure
• Architecture: twin-tube
• Upper mounting: pin
• Spring seat: does not carry a spring
• Suitable for vehicles with electronic damping control and Adaptive systems
• Series: Bilstein B6 Performance DampTronic
• Part number: 20-303426 and BILSTEIN-20-303426

Order with confidence

We verify compatibility before dispatch. Enter your UK registration or the last 7 of your VIN at checkout and our team will confirm this rear unit suits your exact vehicle specification.

Professional installation

Want it fitted properly. Book our in-house workshop. MJ Modifications in Warwickshire offers expert installation and geometry setup. Request a quote at info@mjmodifications.co.uk.

What owners love

• Noticeably tighter rear-end control without sacrificing comfort
• Confident motorway stability and better mid-corner composure
• Great match for xDrive models, petrol, diesel and plug-in hybrid variants

Identifiers

• Brand: Bilstein
• Series: B6 Performance DampTronic
• Part number: 20-303426 and BILSTEIN-20-303426
• EAN: 4025258869748
• UPC: 651860876641

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