This is the BSG (15-720-189) water flange designed for the BMW 3 Series E90 (Sedan), E91 (Touring), E92 (Coupe) models equipped with N43, N45, and N46 coded 4-cylinder gasoline engines. This part connects to the cylinder head and directs the coolant, and over time it can harden and crack due to heat. It should be replaced along with its gasket, as it is one of the most common causes of coolant loss.
- Compatible with 4 Cylinders: Specifically designed for BMW's N43, N45, and N46 series gasoline engines.
- Heat Resistant: Made from reinforced plastic material that withstands the continuously heating and cooling engine coolant.
- Includes Gasket: The special gasket (O-ring) that provides sealing during installation is included with the product.
- Exact Measurements: Hose inlets and bolt holes are identical to the original part's standards.
Technical Details
| Brand / Product Code |
BSG / 15-720-189 |
| Material |
Hard Plastic (Composite) |
| Compatible Engines |
N43, N45, N46 (Gasoline) |
| Package Contents |
Flange + Gasket |
| OEM Reference |
11 53 7 560 130 |
Frequently Asked Questions (FAQ)
Does it fit a diesel (320d) vehicle? NO, IT DOES NOT FIT! The cooling system of diesel engines (N47, M47) is completely different. This product is only for gasoline (316i, 318i, 320i) models.
My vehicle is losing coolant, could this part be the cause? Yes, one of the most common reasons for coolant loss in N46 engines is the hairline cracks that develop in the body of this plastic flange. When the engine heats up, it expands and leaks coolant.
Is the gasket included? Yes, the gasket on the surface that presses against the engine block comes with the product. There is no need to apply additional liquid gasket.
