Bilstein B1 11-181415 Rear Shock Absorber Protection/Service Kit - Dust Cover/Gaiter, Shock/Damper Boot, Bump Stop/Jounce Bumper, Strut Bellows for BMW 3 Series E36 & E46 + ALPINA B3 E46 Rear Axle

Bilstein 11-181415 B1 Rear Suspension Protection Kit for BMW E36 E46 and ALPINA B3 E46

Keep your rear dampers performing as they should with the Bilstein B1 accessory kit, part number 11-181415. This OE-grade rear suspension protection set safeguards the piston rod from grit, water and winter salt, helping prevent pitting and seal wear so your damper action stays smooth, quiet and consistent. A perfect match for Bilstein rear shocks on BMW 3 Series E36 and E46 plus ALPINA B3 E46, it is a smart, low-cost addition whenever you service the rear suspension or fit new dampers and springs.

Key benefits

• Direct-fit rear axle protection kit engineered by Bilstein
• Guards the piston rod against contamination to support long damper life
• OE-level quality and fit for road, fast-road and daily-driven cars
• Optimised to work seamlessly with Bilstein rear shock absorbers
• Improves durability, helps preserve damping performance and ride comfort

What you receive

A Bilstein B1 rear suspension protection set for the applications listed, typically comprising the protective bellows and jounce bumper for the rear axle as specified by Bilstein for 11-181415.

Fitting position

Rear axle

Our experience

We have installed this kit on customer E36 and E46 builds as well as our own projects. Feedback has been excellent, with owners noting quieter operation and peace of mind in all weather. It is an easy win whenever you refresh rear shocks.

Compatibility

ALPINA

• B3 (E46) 03.99 - 01.06
  • 3.3
  • 3.4 S
• B3 Coupe (E46) 03.99 - 01.06
  • 3.3
  • 3.4 S
• B3 Estate Touring (E46) 03.99 - 01.06
  • 3.3
  • 3.4 S
• B3 Convertible Cabrio (E46) 03.99 - 12.05
  • 3.3
  • 3.4 S

BMW 3 Series

• E36 Saloon 09.90 - 11.98
  • 316i, 318i, 318is, 320i, 323i, 325i, 328i, 325td
• E36 Coupe 10.91 - 05.99
  • 316i, 318is, 320i, 323i, 325i, 325is, 328i
• E36 Convertible 03.93 - 11.99
  • 318i, 318is, 320i, 323i, 325i, 328i
• E36 Touring 08.94 - 12.99
  • 316i, 318i, 320i, 323i, 328i, 318tds, 325tds
• E46 Saloon 12.97 - 05.05
  • 316i, 318i, 320i, 323i, 325i, 325xi, 328i, 330i, 330xi, 318d, 320d, 330d, 330xd
• E46 Coupe 12.98 - 07.06
  • 316Ci, 318Ci, 320Ci, 323Ci, 323i, 325i, 325Ci, 328Ci, 330Ci, 330xi, 320Cd, 330Cd
• E46 Convertible 04.00 - 12.07
  • 318Ci, 320Ci, 323Ci, 325Ci, 330Ci, 320Cd, 330Cd
• E46 Touring 06.99 - 05.05
  • 316i, 318i, 320i, 323i, 325i, 325xi, 328i, 330i, 330xi, 318d, 320d, 330d, 330xd
• E46 Compact 03.01 - 02.05
  • 316ti, 318ti, 325ti, 318td, 320td

Fitment check

We will confirm compatibility before dispatch. Add your UK registration or the last seven of your VIN at checkout so we can verify you receive the correct rear suspension protection kit for your BMW or ALPINA.

Professional installation

We recommend expert fitting. MJ Modifications, based in Warwickshire, can install this kit for you. Request a quote at info@mjmodifications.co.uk.

Part numbers and identifiers

• Bilstein Part Number: 11-181415
• EAN: 4025258606992
• UPC: 651860606996

Also searched as

Rear damper boot, rear shock bellows, rear suspension gaiter set, rear jounce bumper, rear strut sleeve, piston rod guard, damper dust shield, BMW E36 rear damper service kit, BMW E46 rear suspension refresh, ALPINA B3 rear shock guard, BMW 3 Series rear shock protector, Bilstein B1 accessory kit 11-181415.

Why it belongs on your car

If you are refreshing rear shocks or chasing the best long-term reliability from your BMW or ALPINA, the Bilstein 11-181415 kit delivers proper protection, tidy fitment and OEM-grade durability. It helps keep damping consistent, reduces the risk of leaking seals and saves money by extending service life. Buy with confidence.