BMW 3 Series E36 E46 / 5 Series E39 / X3 E83 / X5 E53 / Z3 M52 M54 Billet Aluminum M-Style Engine Cap Set Oil Filler Filter Power Steering Coolant 1992 - 2006

Replace four of the most commonly deteriorated factory plastic engine bay caps in a single kit with this precision CNC-machined 6061-T6 billet aluminum M-Style engine cap set, designed for BMW M52 and M54 engined E36, E46, E39, X3, X5, and Z3 platforms. The factory plastic oil filler cap, oil filter lid, power steering reservoir cap, and coolant expansion tank cap are all prone to cracking, discolouration, and fluid leakage as they age and are repeatedly exposed to engine heat. This complete four-piece aluminum set addresses all four failure points simultaneously — each component is engineered to OEM specifications, finished with a corrosion-resistant anodized surface, and designed to deliver a cleaner, more premium engine bay appearance alongside improved long-term reliability over the factory plastic equivalents.

Features:

• M-Style oil filler neck sealing cap – 6061-T6 aircraft aluminum with stainless steel locking tabs and anodized finish for rust and corrosion resistance

• Oil filter lid cap – 36mm hexagonal head for tool-free installation and removal, premium aircraft aluminum for greater strength and hardness than the factory unit

• Power steering reservoir cap – retains all factory specifications including dipstick and ventilation holes, 6061 aluminum eliminates fluid leakage risk from plastic deterioration, supplied with a new gasket

• Coolant expansion tank cap – CNC machined T6061 billet aluminum rated to 2.0 bar maximum internal pressure, fits over the factory cover for a cleaner finish

• Full anodized surface finish across all four components for long-term corrosion and heat resistance

Specifications:

• Condition: 100% Brand New

• Type: 4-Piece Billet Aluminum Engine Cap Set

• Material: 6061-T6 Billet Aluminum Alloy

• Surface Finish: Anodized