Change Car Accessory Belt Kit BMW X4
Change Car Accessory Belt Kit
Easy
0h30–3h30
~50–350£
| Estimated time | 0h30–3h30 |
|---|---|
| Estimated labour cost | ~50–350£ |
| Difficulty | Easy |
| Renew the ancillary drive belt | 0h30–3h00 |
| Renew the engine oil and filter | 0h30–0h45 |
| Renew the air-conditioning compressor drive belt | 1h30–3h30 |
What is a BMW X4 accessory belt?
The accessory belt (also called the auxiliary belt or serpentine belt) allows the engine to drive peripheral components such as the alternator, air conditioning compressor, power steering pump, and sometimes the water pump.
When should you change the BMW X4 accessory belt?
Typical replacement is every 60,000–120,000 km or 4–6 years. Signs of wear include: squealing noise (especially at start-up or in wet weather), visible cracks or fraying. Always replace the tensioner and any idler pulleys at the same time.
Is it difficult to change the BMW X4 accessory belt?
Difficulty level 2/5: technically easy. Key steps: note the belt routing before removal, release the automatic tensioner, slide off the old belt, replace tensioner and idler pulleys, route the new belt, release the tensioner to apply tension.
2 models covered
| Model | Year Range | Engines covered | Fuel |
|---|---|---|---|
| X4 2014-2018 | 2014-2018 | M40i Petrol (N55B30A), xDrive 20d Diesel (B47D20A), xDrive 20d M Performance Diesel (B47D20A), xDrive 20i Petrol (N20B20A), xDrive 28i Petrol (N20B20A), xDrive 30d Diesel (N57D30A), xDrive 30d Diesel (N57D30A), xDrive 30d M Performance Diesel (N57D30A), xDrive 35d Diesel (N57D30… | Diesel, Petrol |
| X4 2018-2025 | 2018-2025 | M Competition Petrol (S58B30A), M Petrol (S58B30A), M40d Diesel (B57D30B), M40d mHev 48V (MHEV),Diesel (B57D30B+JA1), M40i mHEV 48V (MHEV),Petrol (B58B30B), M40i Petrol (B58B30A), M40i Petrol (B58B30B), xDrive 20d Bi-Turbo Diesel (B47D20B), xDrive 20d Bi-Turbo Diesel (B47D20B), … | 48V (MHEV), Diesel, Petrol |
