HKS 24003-LB004 Aluminum Oil Filler Cap Cover Red for Toyota Supra BMW B48 B58

Vehicle Fitment

• 2019+ Toyota GR Supra (A90/A91) - B48 2.0L (DB42, DB22) and B58 3.0L (DB02, DB82), all trims
• 2019+ BMW 3 Series - G20/G21 platform (B48, B58 engines)
• 2018+ BMW 5 Series - G30/G31 platform (B48, B58 engines)
• 2018+ BMW Z4 - G29 platform (B48, B58 engines)
• 2018+ MINI - F54 (Clubman), F55, F56, F57 (Convertible), F60 (Countryman) - B38, B48 engines

Fitment Notes

• This is an oil filler cap COVER - it attaches over the existing OEM plastic BMW oil filler cap using included double-sided tape. It does NOT replace the OEM cap
• Compatible only with vehicles equipped with BMW genuine oil filler cap part number 1112 8 654 637 - verify your cap number before ordering. This cap is used in the majority of BMW B-series (B38, B48, B58) gasoline engine applications
• Outside diameter is 70mm - confirm your OEM cap diameter matches before installing
• Fits both the B48 2.0L and B58 3.0L variants of the Toyota GR Supra A90/A91 - the B-series engine in the Supra uses the same BMW oil filler cap as the BMW applications listed above
• HKS recommends verifying compatibility on the manufacturer's official website for the latest fitment information, as BMW and Toyota B-series model coverage continues to expand

Features

• Machined duralumin (aluminum alloy) construction - lightweight, corrosion-resistant, and significantly more durable and visually striking than the OEM plastic oil filler cap it covers
• Anodized red (Alumite) finish - the hard-anodized surface provides both vibrant color retention and additional surface hardness to resist scratching and oxidation in the engine bay environment
• 70mm outside diameter - precisely sized to fit flush over the OEM BMW B-series oil filler cap without modification
• Simple installation with double-sided tape - attaches directly to the OEM plastic cap in seconds with no tools, no drilling, and no permanent modification to the engine
• Adds an immediate visual upgrade to the engine bay - the red anodized aluminum contrasts sharply with the black engine covers of the GR Supra and G-series BMW, providing a clean, high-quality aftermarket appearance
• Made in Japan by HKS to the same quality standards as their performance engine components
• Lightweight - adds negligible mass while delivering a meaningful aesthetic upgrade

Specifications

• Part Number: 24003-LB004
• Product Type: Oil Filler Cap Cover (overlay, not a replacement cap)
• Material: Duralumin (Aluminum Alloy)
• Finish: Anodized Red (Alumite)
• Outside Diameter: 70mm
• Compatible OEM Cap: BMW Genuine Part Number 1112 8 654 637
• Compatible Engines: BMW B38, B48, B58 gasoline engines
• Installation Method: Double-sided tape (included)
• Country of Manufacture: Japan
• UPC: 4957266600795

Included Components

• 1x HKS duralumin oil filler cap cover (anodized red)
• Double-sided tape for installation

Product Description

The HKS 24003-LB004 is a machined duralumin oil filler cap cover designed for BMW B-series gasoline engines (B38, B48, B58) as found in the Toyota GR Supra A90/A91, BMW G20/G21 3 Series, G30/G31 5 Series, G29 Z4, and select MINI models. Rather than replacing the OEM plastic oil filler cap, this cover attaches directly over it using double-sided tape - the OEM cap remains in place beneath, meaning there is zero risk of oil leaks and zero modification to the engine. The result is a clean, high-quality aluminum appearance where there was previously a basic black plastic cap, adding a noticeable visual accent to an engine bay that often features exposed components on both the GR Supra and contemporary BMW platforms.

The cover is machined from duralumin - a high-grade aluminum alloy known for its combination of light weight and structural strength - and finished with a hard anodized red (Alumite) treatment. Anodizing adds surface hardness and seals the aluminum against corrosion and oxidation, ensuring the red color retains its vibrancy over the life of the product rather than fading or chipping as painted finishes can. At 70mm in outside diameter, it is precisely dimensioned to fit flush over the BMW genuine oil filler cap (part number 1112 8 654 637) used across the majority of B-series applications. Installation requires nothing more than cleaning the surface of the OEM cap and pressing the cover into place using the included double-sided tape - no tools, no permanent changes.

This fitment key - the BMW genuine cap part number 1112 8 654 637 - is what links the Toyota GR Supra application to the BMW product line. Because the Supra's B48 and B58 engines are BMW-sourced and use BMW powertrain hardware, the OEM oil filler cap is identical to that used across the corresponding BMW model range. Owners should verify their specific OEM cap part number before ordering to confirm compatibility. Made in Japan by HKS and backed by the company's limited manufacturer warranty, the 24003-LB004 is a high-quality finishing detail for enthusiasts who want the engine bay presentation to match the rest of their build.