OE Quality
60-Day Returns

Rein EPT0026 Engine Coolant Reservoir
Reliable Engine Coolant Reservoir for BMW Models
The Rein EPT0026 engine coolant reservoir is designed specifically for select BMW vehicles, including the 320i, 323i, 325i, 328i, 528i, M3, and Z3 models. Engineered to meet original equipment specifications, this expansion tank ensures consistent performance and durability under demanding conditions.
Key Features of Rein EPT0026 Expansion Tank
- Manufactured from virgin plastic that meets or exceeds OE specifications
- Resistant to cracking and wear caused by repeated heat cycles
- Direct fitment for easy installation on compatible BMW models
- Produced under strict engineering standards for reliable operation
- Compact dimensions: 11.81 inches length, 5.9 inches width, 3.93 inches height
Detailed Product Description
The Rein EPT0026 engine coolant reservoir is an application-specific component designed to replace the original expansion tank in various BMW vehicles. Constructed from high-quality virgin plastic, it withstands the thermal stresses associated with engine heat cycles, reducing the risk of cracking and coolant leaks. This reservoir is engineered to maintain the proper coolant level and pressure, contributing to the overall efficiency of the vehicle's cooling system. Its direct fitment design allows for straightforward installation without modifications, making it a practical replacement part for BMW 320i, 323i, 325i, 328i, 528i, M3, and Z3 models.
Common Issues Addressed by This Expansion Tank
- Cracking or leaking due to heat-induced wear
- Coolant loss resulting from damaged or faulty reservoirs
- Overheating caused by improper coolant containment
- Pressure inconsistencies within the cooling system
- Difficulty in maintaining coolant levels
Installation Notes and Tips
Installation of the Rein EPT0026 expansion tank is straightforward due to its direct fitment design. It is recommended to drain the coolant system before removal of the old reservoir to prevent spills. Inspect hoses and clamps for wear and replace if necessary during installation. After fitting the new tank, refill the cooling system with the appropriate coolant and bleed air pockets to ensure optimal performance.
Quality Assurance and Warranty
Rein expansion tanks are manufactured to meet strict engineering standards, ensuring durability and reliable performance. Produced from virgin plastic materials, the EPT0026 reservoir resists cracking and wear from heat cycles. While specific warranty details are not provided, Rein products typically adhere to OE quality standards, offering confidence in fit and function for BMW 320i, 323i, 325i, 328i, 528i, M3, and Z3 vehicles.
| Brand | Rein |
| Part Number | EPT0026 |
| Application Type | ApplicationSpecific |
| Container Type | BX |
| Country of Origin | CN |
| Item Height | 3.9300 |
| Item Length | 11.8100 |
| Item Level GTIN | 843266074800 |
| Item Qty | 1 |
| Item UOM | EA |
| Item Weight | 1.2550 |
| Item Weight Unit UOM | LB |
| Item Width | 5.9000 |
| Link to Manufacturer Page | www.reinautomotive.com |
| Product Desc Extended 240 | Rein OE quality expansion tanks are designed to handle heat cycles and resist cracking. These tanks are produced from virgin plastic with no regrind to ensure the plastic is durable and will have a long service life. |
| Product Desc Invoice 40 | Rein Expansion Tank |
| Product Desc Long 80 | Rein OE Quality Expansion Tank |
| Product Desc Short 20 | Expansion Tank |
This part fits 39 vehicles. Search below:
| Year | Make | Model | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2000 | BMW | Z3 | 3.2L | L6 | N/A | ||
| 1999 | BMW | 323i | Convertible | 2.5L | L6 | N/A | |
| 1999 | BMW | 323is | 2.5L | L6 | N/A | ||
| 1999 | BMW | 328i | Convertible | 2.8L | L6 | N/A | |
| 1999 | BMW | 328is | 2.8L | L6 | N/A | ||
| 1999 | BMW | 528i | Sedan | 2.8L | L6 | N/A | Fits vehicles up to September 1998 |
| 1999 | BMW | M3 | 3.2L | L6 | N/A | ||
| 1999 | BMW | Z3 | Convertible | 2.8L | L6 | N/A | Fits vehicles up to September 1998 |
| 1999 | BMW | Z3 | 3.2L | L6 | N/A | ||
| 1998 | BMW | 323i | 2.5L | L6 | N/A | ||
| 1998 | BMW | 323is | 2.5L | L6 | N/A | ||
| 1998 | BMW | 328i | 2.8L | L6 | N/A | ||
| 1998 | BMW | 328is | 2.8L | L6 | N/A | ||
| 1998 | BMW | 528i | 2.8L | L6 | N/A | ||
| 1998 | BMW | M3 | 3.2L | L6 | N/A | ||
| 1998 | BMW | Z3 | 2.8L | L6 | N/A | ||
| 1998 | BMW | Z3 | 3.2L | L6 | N/A | ||
| 1997 | BMW | 328i | 2.8L | L6 | N/A | ||
| 1997 | BMW | 328is | 2.8L | L6 | N/A | ||
| 1997 | BMW | 528i | 2.8L | L6 | N/A | ||
| 1997 | BMW | M3 | 3.2L | L6 | N/A | ||
| 1997 | BMW | Z3 | 2.8L | L6 | N/A | ||
| 1996 | BMW | 328i | 2.8L | L6 | N/A | ||
| 1996 | BMW | 328is | 2.8L | L6 | N/A | ||
| 1996 | BMW | M3 | 3.2L | L6 | N/A | ||
| 1995 | BMW | 320i | 2.0L | L6 | N/A | ||
| 1995 | BMW | 325i | 2.5L | L6 | N/A | ||
| 1995 | BMW | 325is | 2.5L | L6 | N/A | ||
| 1995 | BMW | M3 | 3.0L | L6 | N/A | ||
| 1994 | BMW | 320i | 2.0L | L6 | N/A | ||
| 1994 | BMW | 325i | 2.5L | L6 | N/A | ||
| 1994 | BMW | 325is | 2.5L | L6 | N/A | ||
| 1994 | BMW | M3 | 3.0L | L6 | N/A | ||
| 1993 | BMW | 320i | 2.0L | L6 | N/A | ||
| 1993 | BMW | 325i | Sedan | 2.5L | L6 | N/A | |
| 1993 | BMW | 325is | 2.5L | L6 | N/A | ||
| 1992 | BMW | 320i | 2.0L | L6 | N/A | ||
| 1992 | BMW | 325i | Sedan | 2.5L | L6 | N/A | |
| 1992 | BMW | 325is | 2.5L | L6 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.