Mackay Engine Bypass Coolant Hose for BMW 3-Series and 5-Series E34 2.5L I6

Water Pump to Thermostat Housing

Ensure reliable cooling system performance with the Mackay Engine Bypass Coolant Hose, expertly engineered as a direct OE replacement for BMW 3-Series and 5-Series E34 2.5L inline 6-cylinder engines. Designed and manufactured in Australia to stringent ISO certifications, this hose guarantees precise fitment, excellent durability, and long service life.

Constructed from high-quality ozone and heat resistant rubber, the Mackay bypass hose withstands extreme temperatures ranging from -40°C to 125°C and resists ozone cracking and electrochemical degradation. This makes it a trusted choice for maintenance, repairs, or replacements that demand uncompromised quality and reliability.

Key Features:

• Direct OE replacement for perfect fit and performance
• Manufactured in Australia under strict ISO standards
• High resistance to heat, ozone, and electrochemical wear
• Durable rubber material rated for -40°C to 125°C
• Ideal for BMW E34 3-Series and 5-Series 2.5L I6 cooling systems
• Engineered to exceed original equipment standards

Why Choose Mackay?

For over 85 years, Mackay has been an iconic Australian brand renowned for its automotive innovation and quality — from pioneering rubber-to-metal bonding to supplying components for the legendary FX Holden through to the VF Holden. Mackay’s commitment to excellence ensures every product delivers unmatched performance and longevity.

Note: This product will NOT fit Volvo N12 12.0L TD120 Diesel Inj 6X4 Manual models.

Upgrade your cooling system with confidence. Trust Mackay Engine Bypass Hoses—performance and durability you can count on.

Order your Mackay Engine Bypass Coolant Hose today and keep your BMW running cool!