Bilstein B4 Shock Absorbers 19-323312 – BMW 3 Series, 4 Series

Bilstein Rear (universal) shock absorber — Bilstein Shock Absorber 19-323312

Specifications

• Fitting Position: Rear (universal)
• Type: Gas Pressure
• Damping System: Twin-Tube
• Mounting: Bottom eye

Performance

B4 is Bilstein's OE-replacement damper: valving matched to the car's original specification so ride height, body control and comfort return to how the vehicle left the factory. Nothing is uprated and nothing is lowered — it is the right choice when worn dampers have made the car float, bounce or wander, and you want factory behaviour back rather than a firmer setup. This unit is twin-tube, the construction Bilstein specifies where the original fitment used it.

Fitment

Fits 6 BMW models including 3 Series (G20, G80, G28) and 3er Touring (G21, G81) — see the full list below. Verify fitment using the vehicle compatibility checker above. OEM References: 33 50 6 885 150, 33 52 6 879 317, 33 52 6 879 361, 6 879 361, 33 52 6 888 497.

What's Included

One Bilstein B4 damper unit for the rear axle (either side) — a single shock absorber, not a pair and not an axle set. Order two to do an axle, four for the whole car. Mounting is bottom eye. Bump stops, dust covers, top mounts and fixings are not included.

Warranty

Backed by Bilstein's manufacturer warranty against defects in materials and workmanship. Cover assumes correct installation, the correct tightening torques, and serviceable bump stops and dust covers. A damper run without its protection parts will be scored by road grit — that is wear, not a defect. As an official reseller in the EU, Suspengo also handles your statutory conformity rights on this purchase — contact us first and we deal with the manufacturer.