Mishimoto MMRT-E36-92EBK replaces the brittle factory plastic expansion tank, which cracks after years of heating and cooling cycles, with a fully TIG-welded aluminum tank finished in anodized black. A CNC-machined dipstick doubles as a bleeder so cold coolant level can be set correctly, and a Mishimoto 1.3 bar high-pressure radiator cap raises the coolant boiling point. The tank uses the factory mounting points, hardware and sensors, ships with an overflow hose and worm gear clamp, and installs in under an hour alongside either the stock fan shroud or the Mishimoto E36 Performance Fan Shroud Kit. It fits the S52, M52, M50TU and M20B25 six-cylinder engines and will not fit four-cylinder models.
Specifications
| Type | Aluminum coolant expansion tank |
| Material | Fully TIG-welded aluminum |
| Finish | Anodized black |
| Included | (1) expansion tank, (1) CNC-machined dipstick, (1) Mishimoto 1.3 bar radiator cap, (1) overflow hose, (1) worm gear clamp |
| Clamp Torque | 22 in-lbs (2.5 Nm); range 18 to 27 in-lbs |
| Mounting | Factory mounting points, hardware and sensors |
| Engine Compatibility | S52, M52, M50TU, M20B25; will not fit four-cylinder models |
| Install Time | Under 1 hour |
| Quantity | 1 |
| Part Number | MMRT-E36-92EBK |
| Warranty | Mishimoto Lifetime Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1998-1999 | BMW | 323i | Base |
| 1998-1999 | BMW | 323is | Base |
| 1992-1995 | BMW | 325i | Base |
| 1992-1995 | BMW | 325is | Base |
| 1996-1999 | BMW | 328i | Base |
| 1996-1998 | BMW | 328is | Base |
| 1995-1999 | BMW | M3 | Base |
| 1995 | BMW | M3 | Lightweight |
| 1999-2002 | BMW | Z3 | Coupe |
| 1999-2002 | BMW | Z3 | M Coupe |
| 1998-2002 | BMW | Z3 | M Roadster |
| 1997-2002 | BMW | Z3 | Roadster |
Shipping
- Orders placed before 3 PM ET typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
