BMW Buyer's Guide

Comprehensive Used Car Analysis
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N52B30 3.0L Petrol
N52B30 3.0L Petrol
N52B30 3.0L Petrol
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N52B30

3.0L Petrol
N-series • N52 family • 2004–2015
70%
Engine Reliability
The N52 was BMW's first engine with a magnesium-aluminium composite block. It's the last of the naturally aspirated straight-sixes and widely praised for its smooth power delivery. Main concerns are the electric water pump and oil filter housing gasket.
3.0L
Displacement
I6
Layout
265 hp
Power
315 Nm
Torque
Petrol
Fuel
Naturally aspirated
Aspiration
Technology & Features
Valvetronic IIDouble-VANOSMagnesium/aluminium composite blockElectric water pump
Fuel SystemPort injection
ValvetrainDOHC 24-valve, Valvetronic, Double-VANOS
Used In 4 Applications
1 Series E87 / E82 / E88 130i 3 Series E90 / E91 / E92 / E93 325i, 330i 5 Series E60 / E61 525i, 530i X5 E70 X5 3.0si
3
Known Issues
0
Critical
2
Wear Items
4
Applications

Known Issues – N52B30

medium VANOS Solenoid Failure Common (~30%)
Variable valve timing solenoids develop faults due to oil contamination or electrical issues, causing rough idle and reduced performance.
Typical Mileage
80,000–140,000 km
Est. Repair Cost
€150–€400
DIY Friendly
✓ Yes
Rough idleLoss of powerEngine codesRattling noise
high Oil Filter Housing Gasket Leak Very Common (>45%)
The gasket on the oil filter housing deteriorates, causing oil leaks onto the serpentine belt and alternator. Can cause belt slip and alternator failure if ignored.
Typical Mileage
60,000–110,000 km
Est. Repair Cost
€200–€400
DIY Friendly
✓ Yes
Oil dripsBurning smellLow oil warningBelt squeal
high Electric Water Pump Failure Common (>40%)
The electric water pump (introduced with the N52) fails without warning, causing rapid overheating. Proactive replacement recommended around 100k km.
Typical Mileage
80,000–130,000 km
Est. Repair Cost
€400–€700
DIY Friendly
✓ Yes
OverheatingWarning lightNo heat from vents

Wear & Maintenance – N52B30

Serpentine Belt & Tensioner Every 80,000 km
NewReplace
Replacement Cost€100–€250
Wear Factor55%
Valve Cover Gasket 80,000–120,000 km
NewReplace
Replacement Cost€200–€400
Wear Factor65%

Applications (4)

1 Series E87 / E82 / E88

E87
2004–2013
Variants130i
Power265 hp
Torque315 Nm
BodyHatchback, Coupe, Convertible
Reliability68%
Car-Specific Issues (E87)
mediumRear Subframe Mounting Points
lowWindow Regulator Failure
mediumFront Control Arm Bushings

3 Series E90 / E91 / E92 / E93

E90
2005–2013
Variants325i, 330i
Power218–272 hp
Torque270–320 Nm
BodySedan, Touring, Coupe, Convertible
Reliability65%
Car-Specific Issues (E90)
highElectric Steering Rack Failure
highFootwell Module Water Damage

5 Series E60 / E61

E60
2003–2010
Variants525i, 530i
Power218–272 hp
Torque250–320 Nm
BodySedan, Touring
Reliability58%
Car-Specific Issues (E60)
mediumiDrive System Failures (CCC)
highDynamic Drive Leaks

X5 E70

E70
2006–2013
VariantsX5 3.0si
Power272 hp
Torque315 Nm
BodySAV
Reliability60%
📝 Pre-LCI (2006–2010). Replaced by N55B30 after facelift.
Car-Specific Issues (E70)
highTransfer Case Failure
highAir Suspension Problems

Transmissions (2)

6-Speed Manual (Getrag)
6-Speed Manual (Getrag)
6-Speed Manual (Getrag)
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6-Speed Manual (Getrag)

Getrag • 6-speed manual • 2003–2019

Getrag 6-speed manual used across a wide range of BMWs. Different models handle various torque capacities. Known for precise, mechanical shift action. The GS6-53DZ handles up to 500Nm (used with 335i/M135i).
Known Issues2
medium 2nd Gear Synchro Wear Moderate (~20%)
Second gear synchros can wear, especially on higher-torque applications, causing grinding on fast 2nd gear shifts.
Typical Mileage
100,000–180,000 km
Est. Repair Cost
€800–€1,500
DIY Friendly
✗ Specialist
Grinding into 2nd gearDifficulty downshifting to 2nd
low Clutch Release Bearing Noise Moderate (~25%)
Clutch release (throw-out) bearing develops a chirp or whine when clutch is depressed.
Typical Mileage
80,000–150,000 km
Est. Repair Cost
€400–€800 (usually replaced with clutch)
DIY Friendly
✗ Specialist
Chirping with clutch pressedWhining noiseVibration in pedal
Wear Items
Clutch Assembly 100,000–180,000 km
NewReplace
Replacement Cost€700–€1,500
Wear Factor55%
Dual Mass Flywheel 150,000–250,000 km
NewReplace
Replacement Cost€500–€1,000
Wear Factor45%
Transmission Fluid Every 80,000 km
NewReplace
Replacement Cost€50–€120
Wear Factor30%
Fluid TypeMTF-LT-4 / MTF-LT-5
Service IntervalLifetime fill (recommended every 80,000 km)
6-Speed Automatic (ZF 6HP)
6-Speed Automatic (ZF 6HP)
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6-Speed Automatic (ZF 6HP)

ZF • 6-speed automatic • 2003–2014

The ZF 6-speed is an excellent torque-converter automatic used across BMW, Audi, Jaguar, and others. Smooth, responsive, and very reliable when serviced properly. The 6HP26 handles up to 600Nm. Mechatronic (valve body) issues can occur at high mileage if fluid has never been changed.
Known Issues2
high Mechatronic Unit Failure Moderate (~20%)
The mechatronic unit (integrated valve body and TCU) can fail, causing erratic shifting, limp mode, or complete transmission failure. Usually caused by degraded fluid.
Typical Mileage
120,000–200,000 km
Est. Repair Cost
€800–€2,500
DIY Friendly
✗ Specialist
Harsh shiftingLimp mode (stuck in gear)Warning lightNo drive
medium Torque Converter Shudder Moderate (~20%)
Torque converter lockup clutch develops a shudder at light throttle / highway cruising.
Typical Mileage
100,000–180,000 km
Est. Repair Cost
€1,000–€2,000
DIY Friendly
✗ Specialist
Vibration at 60-100 km/hShudder under light load
Wear Items
Transmission Fluid & Filter Every 60,000–80,000 km
NewReplace
Replacement Cost€250–€500
Wear Factor50%
Transmission Pan Gasket With fluid service
NewReplace
Replacement Cost€30–€60
Wear Factor40%
Fluid TypeZF Lifeguard 6
Service IntervalEvery 60,000–80,000 km (BMW claims lifetime)