For the Masses. BMW has insisted on using plastic power steering reservoir caps for generations. Regardless of use, these plastic caps can show excessive wear over time, especially if your power steering fluid leaks.

We've decided to offer a billet aluminum cap replacement for enthusiasts who cannot run our expansion reservoir (or feel they don't require the extra headroom). This plug-and-play unit adds visual appeal to an otherwise lackluster engine bay presentation while tangentially performing some light maintenance duty. Each 6061-T6 aluminum cap comes with a fresh OEM gasket and is available in four standard finishes: Ferrari Red, Royal Blue, Hard Coat Clear, and Hard Coat Black.

Product Details:

  • Compatible with most late model BMWs (complete application list below)
  • Plug and play replacement for OEM plastic ZF reservoir cap
  • CNC precision machined from 6061-T6 aerospace aluminum
  • Includes OEM cap gasket replacement
  • Four anodizing options: Ferrari Red, Royal Blue, Hard Coat Clear, & Hard Coat Black
  • Proudly made in the USA

Application List:

  • E82 1-Series, 1M
  • E36 3-Series, M3
  • E46 3-Series, M3
  • E9X 3-Series, M3
  • E39 5-Series
  • E63 6-Series
  • E85 Z4, Z4M
  • E84 X1
  • E83 X3
  • E53 X5, 4.8iS