S63TU4 Billet Coolant Reservoir for BMW F90 M5 & F91/F92/F93 M8
Upgrade your cooling system with the S63TU4 Billet Coolant Reservoir, engineered specifically for the BMW F90 M5 and BMW F91, F92, and F93 M8 models. Designed as a direct replacement for the factory plastic coolant tank, this premium 6061 billet aluminum coolant reservoir eliminates one of the most common failure points on the S63TU4 engine.
Unlike the OEM plastic reservoir, which is prone to cracking and coolant leaks over time, this CNC-machined billet coolant expansion tank offers exceptional durability and long-term reliability. It is a true plug-and-play upgrade, utilizing the factory coolant cap, OEM quick-connect fittings, and original coolant level sensor for hassle-free installation without triggering warning lights or affecting coolant level readings.
Whether your BMW is a daily driver or a high-performance build, this BMW billet coolant reservoir provides the confidence and durability needed to protect your engine from coolant leaks that can damage ignition coils, injectors, and surrounding components.
Key Features
- Precision CNC-machined from 6061 billet aluminum
- Direct replacement for OEM part 17137889450
- Eliminates common OEM plastic reservoir failures
- Retains the factory coolant cap
- Uses OEM quick-connect fittings for a perfect fit
- Compatible with the original coolant level sensor
- Internal baffling reduces coolant movement during aggressive driving
- O-ring housing designed for the OEM sensor seal
- Corrosion-resistant, durable construction
- Simple plug-and-play installation
Why Upgrade?
The factory plastic coolant reservoir on the BMW F90 M5 and BMW M8 is well known for developing cracks and leaks over time. A leaking coolant tank can result in coolant reaching the ignition coils and fuel injectors, leading to expensive repairs, unexpected breakdowns, and even engine damage.
Replacing the original plastic reservoir with another OEM unit only delays the problem. This billet aluminum coolant reservoir offers a permanent solution, providing superior strength, improved reliability, and long-lasting performance.
Vehicle Compatibility
Compatible with the following BMW models:
- BMW F90 M5 (2018–2023)
- BMW F90 M5 LCI (2019–2023)
- BMW F91 M8 Convertible
- BMW F92 M8 Coupe
- BMW F93 M8 Gran Coupe
OEM Replacement Part Number: 17137889450
Important: Please verify your vehicle uses OEM part number 17137889450 before purchasing. You can confirm compatibility by entering the last seven digits of your VIN into the BMW parts catalog and checking the radiator/cooling system section.
Installation Notes
- Reuse the original BMW coolant level sensor.
- Reuse the factory coolant cap.
- The coolant sensor may require gentle trimming around the plastic housing during removal if it is difficult to extract from the original reservoir.
- A new O-ring for the coolant sensor is included.
- Tighten the OEM cap securely; the alignment arrows do not need to line up perfectly.
- Compatibility is the customer's responsibility. Please verify the OEM part number before ordering.
Upgrade Your BMW Cooling System
Protect your BMW F90 M5 or BMW M8 from common coolant reservoir failures with this premium S63TU4 Billet Coolant Reservoir. Built for strength, reliability, and OEM-level fitment, it's the ideal cooling system upgrade for enthusiasts who demand lasting performance and peace of mind.
