Change Car Water Pump BMW 4-Series
Change Car Water Pump
Easy
2h00–9h00
~200–900£
| Estimated time | 2h00–9h00 |
|---|---|
| Estimated labour cost | ~200–900£ |
| Difficulty | Easy |
| Vehicles |
4-Series 2013-2020 28
4-Series 2020-2025 8
|
| Renew the coolant pump Rear-wheel drive | 2h30 |
| Renew the coolant pump | 2h30 |
| Renew the coolant pump Convertible | 3h00 |
What is the function of a BMW 4-Series water pump?
The water pump circulates the coolant through the engine and radiators. Together with the thermostat, it maintains the engine within its operating temperature range. Most engines have a mechanical water pump driven by the timing belt or an accessory belt.
When should you change the BMW 4-Series water pump?
If the water pump is driven by the timing belt, it is strongly recommended to replace it at the same time as the timing belt kit. Signs of failure include: coolant leak from the pump weep hole, grinding or whining noise, engine overheating.
Is it difficult to change the BMW 4-Series water pump?
Difficulty level 2/5: technically easy if replaced as part of a timing belt kit change. If replaced independently, the timing belt must be removed and refitted, requiring engine timing tools.
2 models covered
| Model | Year Range | Engines covered | Fuel |
|---|---|---|---|
| 4-Series 2013-2020 | 2013-2020 | 418d Diesel (B47D20A), 418d Diesel (N47D20C), 418i Petrol (B38B15A), 420d Diesel (B47D20A), 420d Diesel (N47D20C), 420d, -xDrive Diesel (B47D20A), 420d, -xDrive Diesel (N47D20C), 420d, -xDrive M Performance Diesel (B47D20A), 420d, -xDrive M Performance Diesel (N47D20C), 420i, -x… | Diesel, Petrol |
| 4-Series 2020-2025 | 2020-2025 | 420d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 420d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 420i Petrol (B48B16A), 420i, xDrive Petrol (B48B20A), 430d mHev, xDrive 48V (MHEV),Diesel (B57D30B+JA1), 430i, -xDrive Petrol (B48B20B), M4 Competition, -xDrive Petrol (S58B30… | 48V (MHEV), Diesel, Petrol |
