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X3 F25
F25 • 2010–2017 • SAV
2
Engine Options
8
Known Issues
3
Critical Issues
70%
Reliability Score
Facelift (LCI) – 2014
- Full LED headlights option
- Updated iDrive
- New engines (B47/B48 replacing N20/N47)
70% – Good
Engines
N20B20 – 2.0L Turbo Petrol
X3 20i, X3 28i • 184–245 hp • 270–350 Nm
Displacement 2.0L
Layout I4
Fuel Petrol
Transmission 8-Speed Automatic (ZF 8HP)
Known Issues4 issues
critical
Timing Chain Stretch Common (>30%)
The N20 timing chain and guides wear prematurely, causing rattling and potential engine failure if ignored. Particularly common on earlier production units.
Typical Mileage
60,000–120,000 km
Est. Repair Cost
€1,500–€3,000
DIY Friendly
✗ Specialist
Rattling on start-upCheck engine lightRough idleRough running
critical
Oil Pump Failure Occasional (~15%)
Oil pump drive can fail leading to complete oil pressure loss. Catastrophic engine damage results.
Typical Mileage
80,000–150,000 km
Est. Repair Cost
€2,000–€6,000+
DIY Friendly
✗ Specialist
Oil pressure warningEngine knockSudden power loss
medium
Charge Pipe Failure Common (>30%)
The plastic charge pipe cracks under boost pressure, causing a sudden loss of power. Aftermarket aluminium upgrades available.
Typical Mileage
50,000–100,000 km
Est. Repair Cost
€100–€250 (aftermarket upgrade)
DIY Friendly
✓ Yes
Boost lossWhistling noiseLimp mode
medium
Coolant Loss at Thermostat Common (~30%)
Thermostat housing cracks or gasket leaks, causing slow coolant loss.
Typical Mileage
60,000–100,000 km
Est. Repair Cost
€200–€400
DIY Friendly
✓ Yes
Low coolant warningPuddle under carOverheating
N47D20 – 2.0L Diesel
X3 18d, X3 20d • 143–184 hp • 300–380 Nm
Displacement 2.0L
Layout I4
Fuel Diesel
Transmission 6-Speed Manual (Getrag), 8-Speed Automatic (ZF 8HP)
Known Issues3 issues
critical
Timing Chain Failure (Rear-Mounted) Very Common (>50%)
The N47 is notorious for its rear-mounted timing chain that wears prematurely and can snap, destroying the engine. This is the single biggest concern with this engine. Can fail as early as 50k km.
Typical Mileage
50,000–120,000 km
Est. Repair Cost
€2,000–€5,000 (engine replacement if chain snaps)
DIY Friendly
✗ Specialist
Rattling from rear of engineChain slap noise on cold startCatastrophic engine failure
high
Swirl Flap Failure Common (>30%)
Intake swirl flaps can break apart and get ingested by the engine, causing catastrophic damage. Preventative delete kits are strongly recommended.
Typical Mileage
80,000–150,000 km
Est. Repair Cost
€400–€800 (delete kit) or €2,000+ (engine damage)
DIY Friendly
✓ Yes
Loss of powerMetal debris in intakeRough running
medium
EGR Valve Clogging Common (>35%)
EGR valve clogs with carbon deposits, causing poor performance and increased emissions. Especially problematic with frequent short trips.
Typical Mileage
60,000–100,000 km
Est. Repair Cost
€300–€600
DIY Friendly
✓ Yes
Reduced powerBlack smokeEML lightRough idle
Common Issues (F25-specific)
Drivetrain 1
medium
xDrive Transfer Case Leak Moderate (~20%)
Transfer case output seal can leak fluid.
Typical Mileage
80,000–150,000 km
Est. Repair Cost
€200–€500
Category
Drivetrain
Fluid drips from transfer casexDrive warning
Wear Items
N20B20 – Wear Items
X3 20i, X3 28i
Spark Plugs
Every 60,000 km
Replacement Cost€80–€150
Wear Factor55%
Turbo Wastegate Rattle Fix
60,000–100,000 km
Replacement Cost€100–€300
Wear Factor45%
N47D20 – Wear Items
X3 18d, X3 20d
DPF (Diesel Particulate Filter)
120,000–200,000 km
Replacement Cost€800–€2,000
Wear Factor45%
Dual Mass Flywheel
100,000–180,000 km
Replacement Cost€600–€1,200
Wear Factor55%
All Variants
All Variants
Complete list of model variants for F25