xDrive30d (M57 / N57)
2007–2013 · diesel · 2993cc · 235hp
Engine codes: M57, N57
Reliability, common problems and owner reviews for the Bmw X5 xDrive30d (M57 / N57). Check this before you buy used.
The 30d straight-six diesel is the X5 to buy — strong, smooth and well-matched to the weight, with the early M57 and later N57 both being robust, high-mileage units that avoid the four-cylinder N47's timing-chain horror. Watch the EGR cooler (known BMW diesel leak/clog), swirl flaps on the M57, DPF on short trips, and high-mileage turbo/injection. A documented six is one of the more dependable big diesels you can buy.
Same engine, other cars
This is the same physical engine (M57) sold under different names across brands. Reliability is broadly shared — cross-check these:
Known Issues
EGR cooler leaks/clogs (known BMW diesel issue) → coolant loss/limp.
Fix / Workaround: Replace EGR cooler; check coolant.
Repair cost: €300–€1200
Typically appears after: 150,000 km
M57 intake swirl flaps can break and be ingested.
Fix / Workaround: Inspect/replace or delete swirl flaps.
Repair cost: €150–€1500
DPF on short trips; turbo/injectors at high mileage.
Fix / Workaround: Motorway regens; check turbo/injectors.
Repair cost: €300–€1600
Typically appears after: 200,000 km
Mileage Thresholds
After 250,000 km: Durable six with care.
Pre-Purchase Checklist
- ☐The engine to buy — robust six
- ☐EGR cooler + swirl-flap history
- ☐DPF history (city cars)
Frequently asked questions
Is the Bmw X5 xDrive30d (M57 / N57) reliable?
Maint. Sensitive — The 30d straight-six diesel is the X5 to buy — strong, smooth and well-matched to the weight, with the early M57 and later N57 both being robust, high-mileage units that avoid the four-cylinder N47's timing-chain horror. Watch the EGR cooler (known BMW diesel leak/clog), swirl flaps on the M57, DPF on short trips, and high-mileage turbo/injection. A documented six is one of the more dependable big diesels you can buy.
What are the common problems and reviews for the Bmw X5 xDrive30d (M57 / N57)?
The most commonly reported problems: EGR cooler, Swirl flaps (M57), DPF / turbo (high miles).
Is a used Bmw X5 xDrive30d (M57 / N57) worth buying?
Fine if serviced correctly — but it punishes neglect hard. History and the right consumables matter.