Bilstein B4 19-325798 Rear Shock Absorber / Damper / Strut (Back Shock) - BMW 4 Series G22 G23 & M4 G82 G83 2020-on - OE/OEM Spec Direct Replacement, Gas Pressure Twin-Tube, Rear Axle, Fits 420i 430i M440i 420d 430d xDrive Coupe & Convertible

Bilstein B4 19-325798 Rear Damper for BMW 4 Series G22 G23 and M4 G82 G83

Bring back factory-tight body control, comfort and confidence with this Bilstein B4 rear suspension unit, part number 19-325798. Designed as an OE-spec back axle damper, it is a direct bolt-in solution for BMW 4 Series G22 coupe, G23 convertible and BMW M4 G82 G83 models from 2020 onwards. If your car feels bouncy, unsettled over rough surfaces or vague through fast corners, this premium Bilstein replacement restores the precise road manners you expect from a modern BMW.

We fit these in our own workshop and customer feedback is consistently excellent. Owners report a smoother ride, better high speed stability, sharper turn-in and far more composure over potholes and speed humps. The B4 range delivers dependable Bilstein quality with OE-level damping characteristics, perfect for daily driving and spirited road use without increasing harshness.

Key benefits

• Direct-fit rear shock unit for BMW G22 G23 G82 G83, no modifications required
• Gas pressure twin-tube construction for consistent, fade-free control
• Restores original handling balance, traction and braking stability
• OE-grade build for longevity and reliability on UK roads
• Matched to factory springs and mounts for a stock ride feel
• Ideal replacement when your rear shocks are tired or leaking

Vehicle applications

Fitting position: Rear axle. Compatible with the following models and derivatives:

• BMW 4 Series Coupe G22 and BMW M4 Coupe G82 from 07.2020 onward
  • 420i 1.6, 420i, 420i xDrive, 430i, 430i xDrive
  • M440i Mild Hybrid, M440i Mild Hybrid xDrive
  • 420d Mild Hybrid, 420d Mild Hybrid xDrive
  • 430d Mild Hybrid xDrive, M440d Mild Hybrid xDrive
• BMW 4 Series Convertible G23 and BMW M4 Convertible G83 from 11.2020 onward
  • 420i, 430i, 430i xDrive
  • M440i Mild Hybrid
  • 420d Mild Hybrid, 430d Mild Hybrid

Technical information

• Type: Gas pressure
• System: Twin-tube
• Design: Shock absorber does not carry a spring
• Mounts: Bottom eye, top pin
• Location: Rear

Why choose Bilstein B4 for your BMW

• OE-spec damping characteristics that keep your BMW feeling like new
• Excellent ride comfort with confident body control in fast lane changes
• Great value replacement for worn original shocks
• Trusted by our workshop and our customers for consistent performance

Fitment check

We will verify compatibility before dispatch. Add your UK registration or the last 7 characters of your VIN at checkout and we will confirm that Bilstein 19-325798 is correct for your car.

Professional installation

Prefer a hassle-free fitment service. Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability. We recommend replacing rear dampers in pairs for best results.

Part numbers and identifiers

• Manufacturer reference: 19-325798
• EAN: 4025258884949
• UPC: 651860893785

In stock and ready to ship

Order today to refresh your 4 Series or M4 with crisp, confident road manners. This Bilstein B4 rear damper delivers OE-level control, reliability and a direct bolt-in fit for BMW G22 G23 G82 G83.

Popular search terms

BMW G22 rear damper, BMW G23 rear strut, BMW G82 back shock, BMW G83 shock absorber rear, BMW 4 Series rear suspension shock, M4 rear shock replacement, Bilstein B4 rear strut BMW, OEM spec rear shock BMW 420i 430i M440i 420d 430d xDrive, standard suspension damper BMW G22 G23, bolt-in rear shock BMW 4 Series, factory spec rear shock BMW M4, gas pressurised twin tube rear shock, rear axle shock absorber BMW coupe and convertible, 2020 onwards BMW rear damper, direct replacement shock BMW G-series.