Rein CHU0589 Upgraded Aluminum Coolant Crossover Pipe for MINI 1.6L Engines

The Rein CHU0589 is an upgraded aluminum coolant crossover pipe engineered to permanently resolve a well-documented failure point in MINI 4-cylinder 1.6L engines. The factory-installed plastic crossover pipe is prone to cracking and leaking over time due to repeated thermal cycling and hydrolysis, making this aluminum replacement a smart, long-term solution for preventive maintenance or active coolant leak repair.

Key Features:

• Upgraded aluminum construction — replaces the failure-prone OE plastic pipe with a more durable metal alternative that resists heat, chemical exposure, and long-term wear
• Direct OE-fit design — engineered to match factory specifications exactly, allowing for straightforward installation with no modifications required
• Complete installation kit — includes the necessary O-ring and clip so you have everything needed for a full, proper repair
• Eliminates common failure points — specifically addresses cracking and leaking caused by thermal cycling and hydrolysis that degrade the original plastic part
• Manufactured to strict quality standards — resistant to heat, salt, road debris, oil, and other engine contaminants

The Rein CHU0589 is part of CRP Automotive's Rein Upgraded Metal Coolant Pipe line, designed for import vehicle owners who want a lasting fix rather than a like-for-like plastic replacement. This pipe is also commonly referred to as a coolant crossover pipe or coolant transfer pipe. OEM cross-reference: BMW/MINI 11537589713, 11537541845.