RacingLab Transmission Oil Cooler - BMW G-Series (B58) & Toyota GR Supra A90

The Racing Lab High-Performance Transmission Oil Cooler is designed for tuned and track-driven BMW G-Series B58 and Toyota GR Supra A90/A91 vehicles, providing increased transmission cooling capacity while retaining full OEM-style fitment.

+100% Core Thickness

OEM Core Thickness: Approx. 16 mm
Racing Lab Core Thickness: 32 mm
Increase: +100%

The larger 32 mm aluminium core provides increased heat-exchange volume and thermal capacity, helping manage transmission temperatures during sustained high-load driving, repeated track sessions and higher-output applications.

Integrated Protective Mesh

Supplied with a dedicated protective mesh to help shield the cooling core from insects, small stones, tyre debris and other road or track debris while maintaining airflow through the cooler.

Direct OEM Replacement

Designed as a true direct-fit upgrade using the factory mounting position and original installation points.

• No cutting required
• No drilling required
• No fabrication required
• No vehicle modification required
• Retains factory mounting locations
• Designed to connect with the original transmission cooling system

Key Features

• 32 mm high-performance aluminium core
• +100% core thickness compared with OEM
• Protective mesh / stone guard included
• Helps protect the core from insects, small stones and track debris
• OEM-style direct-fit installation
• Uses factory mounting position
• Increased heat-exchange volume
• Improved transmission thermal management
• Helps reduce heat build-up during repeated high-load operation
• Suitable for tuned and higher-torque B58 applications
• Designed for street, track and circuit use

Vehicle Compatibility

• Toyota GR Supra MK5 (A90 / A91) — B58, 2020+
• BMW M240i / M240i xDrive (G42) — B58, 2022+
• BMW M340i / M340i xDrive (G20 / G21) — B58, 2018–2024*
• BMW M440i / M440i xDrive (G22 / G23 / G26) — B58, 2021–2024*
• BMW Z4 M40i (G29) — B58, 2018+

OE Reference / Replaces

• BMW: 17219494828
• Toyota: 32910-WAA02

Fitment Note: Late-production 2024 and 2025+ BMW M340i / M440i models equipped with the newer B58N cooling configuration may use OE transmission cooler 17218852263 and are not compatible with this cooler. Please confirm the OE part number on your vehicle or contact Racing Lab with your VIN before ordering.

Recommended For

• Track and circuit vehicles
• Stage 2 and higher-power B58 applications
• Upgraded turbo setups
• Transmission-tuned vehicles
• High ambient temperature operation
• Repeated high-load driving

The +100% figure refers specifically to the increase in cooling core thickness from approximately 16 mm OEM to 32 mm Racing Lab.

All Racing Lab performance parts are covered by a 1-year limited warranty against manufacturing defects and workmanship issues.

Every component is rigorously inspected to ensure quality and reliability, so you can upgrade your vehicle with confidence. If any issues arise, our support team is ready to assist with fast and hassle-free warranty claims.

We accept returns under the following strict conditions:

Restocking Fee: A 20% restocking fee (deducted from the product purchase price) applies to all returned items.

Item Condition: Returned items must show no signs of use, installation, or wear.