Bilstein B1 Rear Shock Absorber Dust Cover Boot + Bump Stop/Jounce Bumper (Gaiter/Bellows/Sleeve) Kit for BMW Z4 E89 2009–2016 sDrive 18i 20i 23i 28i 30i 35i | Rear Damper Protection Service Set | 11-305989

Rear Damper Protection Kit for BMW Z4 E89 by Bilstein – Part No. 11-305989

Keep your Z4’s rear suspension working at its best with this OE-spec rear damper protection set from Bilstein. This service kit shields the piston rod and seals, keeping grit, spray and salt out while restoring the correct cushioning at full compression thanks to fresh bump stops. We have fitted these on our own cars and for customers, and the result is consistently tight, quiet and confidence inspiring.

What it does

• Guards the damper rod with a robust protective boot to reduce wear and corrosion
• Replaces tired jounce bumpers to control bottoming and improve ride refinement
• Helps maintain steering precision, chassis balance and consistent damping performance
• Direct-fit OE-grade solution that refreshes perished bellows and buffers
• Engineered to pair perfectly with Bilstein dampers and OE-equivalent rear shocks

Why it matters

Split or missing rear shock boots allow contaminants to attack critical sealing surfaces, which can lead to leaks, harshness and knocks. Renewing the gaiters and bump stops is a smart piece of preventative maintenance that protects your investment, keeps road noise down and preserves the poised feel BMW intended.

Vehicle coverage

Rear axle fitment for BMW Z4 Roadster E89, 2009 to 2016, including:

• sDrive 18i
• sDrive 20i
• sDrive 23i
• sDrive 28i
• sDrive 30i
• sDrive 35i

Fitment check

We are happy to verify compatibility before dispatch. Add your UK reg or the last 7 of your VIN at checkout and we will confirm this part suits your E89 rear suspension.

Professional fitting

Want it installed properly first time? Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote.

Part details

• Manufacturer: Bilstein
• Series: B1 Service Parts
• Part number: 11-305989
• Alternate reference: BILSTEIN-11-305989
• EAN: 4025258858667
• UPC: 651860866383

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Ready to sort that rear end and keep the ride crisp? Add to basket today and give your Z4 the protection it deserves.