Mishimoto MMRT-E36-92E Aluminum Expansion Tank for 1992-1999 BMW E36

Vehicle Fitment

• 1992-1999 BMW E36 (325i, 325is, 328i, 328is, M3; performance chassis)

Features

• Direct-fit aluminum coolant expansion tank designed for E36 chassis
• Fully welded 6061 aluminum construction for improved durability
• CNC-machined dipstick doubles as bleeder for accurate coolant level checks
• Includes Mishimoto high-pressure 1.3 bar radiator cap to raise boiling point
• Polished finish enhances engine bay appearance
• Fits with stock and performance fan shroud kits
• Easy installation in under 1 hour using OEM mounting locations
• Backed by Mishimoto Lifetime Warranty

Specifications

• Part Number: MMRT-E36-92E
• Material: TIG-welded 6061 aluminum
• Finish: Polished or black anodized available
• Pressure Cap: Included 1.3 bar (19 psi) radiator cap
• Dipstick: CNC-machined dipstick/bleeder
• Torque Spec: Worm-gear clamp torque ~22 in-lbs (2.5 Nm)
• Chassis Code: BMW E36
• Engine Codes: S52, M52, M50TU, M20B25 (six-cylinder only)

Included Components

• 1x Aluminum expansion tank
• 1x CNC-machined dipstick/bleeder
• 1x Mishimoto 1.3 bar radiator cap
• 1x Coolant overflow hose
• 1x Worm-gear clamp
• Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMRT-E36-92E Aluminum Expansion Tank is a direct-fit performance upgrade engineered for BMW E36 platforms from 1992 through 1999. Replacing the stock plastic reservoir with a TIG-welded 6061 aluminum tank improves durability, reduces risk of cracking from repeated thermal stress, and enhances engine bay aesthetics with a polished finish. Its CNC-machined dipstick also functions as an integrated bleeder, helping you achieve proper coolant levels with confidence.

This expansion tank includes a high-pressure 1.3 bar radiator cap to raise the coolant's boiling point, making the system more robust under demanding conditions while retaining compatibility with both factory and performance fan shroud kits. Designed for easy installation in under an hour using existing mounting points, the MMRT-E36-92E is ideal for enthusiasts restoring or upgrading their E36 cooling system for street or track use.