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BMW >> 5 Series >> E34 >> 3.4 Litre 6 Cyl M30 B35 ME7 SOHC 12v >> 12/1987 - 09/1992 4 Door Sedan >> Mackay Engine Bypass Hose for BMW 528i E12 2.8L I6

Mackay Engine Bypass Hose for BMW 528i E12 2.8L I6 Fits BMW 5 Series E34 Sedan [12/1987 to 09/1992] (3.4L M30 B35 ME7 6 Cyl SOHC MPFI)

Part
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Mackay Engine Bypass Hose for BMW 528i E12 2.8L I6

Fitment Information:

Water Pump To Thermostat Housing

$10.33

Specifications
Product Type: Engine Bypass Hose / Coolant Hose
Material: High-Quality Rubber / EPDM
Temperature Rating: -40°C to 125°C
Resistance Properties: Electromechanical Degradation Resistance, Heat Resistance, Ozone Resistance
Standards & Certifications: Certified to ISO Standards
Fitment Type: Direct OE Replacement

Tick This part will fit the following Vehicles:

BMW 5 Series E34 (3.4 Litre 6 Cyl M30 B35 ME7 SOHC 12v):
  • RWD Sedan 4 Door [12/1987 to 09/1992] 155KW With Auto or Manual Transmission With: Water Pump To Thermostat Housing
BMW 7 Series E32 (3.4 Litre 6 Cyl M30 B35 ME7 SOHC 12v):
  • RWD Sedan 4 Door [07/1986 to 08/1988] 155KW With Auto Transmission With: Water Pump To Thermostat Housing
  • RWD Sedan 4 Door [03/1987 to 12/1990] 155KW With Auto Transmission With: Water Pump To Thermostat Housing

Description

Mackay Engine Bypass Hose for BMW 528i E12 2.8L I6 – Thermostat Housing to Water Pump

Upgrade your BMW’s cooling system with the Mackay CH1878 Engine Bypass Hose, engineered specifically for precision fitment and lasting performance. Designed in Australia by Mackay, a trusted name with over 90 years of innovation and automotive expertise, this direct OE replacement hose delivers reliable coolant transfer between the thermostat housing and water pump, ensuring your engine maintains optimal temperatures under all driving conditions.

Key Features:

  • Perfect Fitment: Direct replacement hose designed to match original equipment specifications for BMW models, including the 528i E12 2.8L I6.
  • Durable Construction: Made from high-quality rubber and EPDM compound, resistant to heat, ozone, and electromechanical degradation.
  • Wide Temperature Range: Outstanding performance from -40°C to 125°C to handle extreme engine bay conditions.
  • ISO Certified Quality: Manufactured to meet or exceed international standards for dependable service life.
  • Reliable Fluid Transfer: Maintains efficient coolant circulation to protect your engine from overheating and damage.
  • Easy Installation: OEM-standard fitment allows for straightforward replacement without modifications.

Perfect For:

  • Cooling system repairs and maintenance
  • Full cooling system overhauls
  • Restorations of BMW 528i E12 models or compatible vehicles requiring a thermostat housing to water pump bypass hose

Mackay - Australian Automotive Excellence

With a proud history spanning 85 years, Mackay has been a pioneer in automotive parts manufacturing—already a trusted name on Australia’s first and last domestically produced vehicles. Mackay continues to lead the aftermarket with a commitment to uncompromised quality and precision engineering, exporting high-performance parts worldwide from Melbourne.

Note on Fitment:

While primarily made for BMW 528i E12 2.8L I6, this Mackay bypass hose shares design lineage with compatible models in the BMW 7 Series E32 range (3.0L and 3.4L M30 engines). Always confirm your vehicle compatibility before purchase.

Ensure your BMW’s cooling system operates flawlessly with the Mackay Engine Bypass Hose — a reliable, durable, and premium-quality solution engineered to keep your engine running cool under pressure. Order now for peace of mind and long-lasting performance!