S63TU4 BILLET COOLANT RESERVOIR, BMW – F90 M5 & F91/F92/F93 M8

Billet Coolant Reservoir

Upgrade your cooling system with a billet aluminum coolant reservoir engineered to replace the failure-prone factory plastic unit. Precision-machined from high-strength 6061 billet aluminum, this all-metal reservoir is built for long-term durability and helps eliminate the leaks commonly associated with the OEM plastic design.

Designed as a true plug-and-play replacement, it retains the factory cap to maintain the OEM pressure relief function, uses all original mounting points and quick-connect fittings, and reuses the factory coolant level sensor for accurate fluid level monitoring without triggering warning lights.

Why Upgrade?

The factory plastic coolant reservoir is known to crack and leak over time. Coolant leaks can damage ignition coils, injectors, and other engine components, potentially leading to costly repairs and unnecessary downtime. Upgrading to a billet aluminum reservoir provides a durable, long-lasting solution and reduces the risk of future failures.

Features

• Precision CNC-machined from 6061 billet aluminum
• Durable all-metal construction
• Retains the OEM factory cap
• Uses all OEM mounting points and quick-connect fittings
• Compatible with the OEM coolant level sensor
• O-ring housing designed for the factory O-ring
• Internal baffling to minimize coolant movement during driving
• Direct plug-and-play installation

Vehicle Fitment

• BMW F90 M5 (2018–2023)
• BMW F91 M8 Convertible (2019–2025)
• BMW F92 M8 Coupe (2019–2025)
• BMW F93 M8 Gran Coupe (2020–2025)

Replaces OEM Part Number: 17137889450