N53 vs M54 — Reliability Comparison

Specifications

N53

M54

Brand

BMW

Verdict

CAUTION

BEST

Reliability

52

86

Years

2006--2013

2000--2006

Displacement

2996 cc

2979 cc

Layout

I6

Type

Petrol Na

Power

190--272 hp

170--231 hp

Known Issues

7

6

Total Risk Cost

€620--€4,800

€300--€700

Character

N53

"Direct-injection version of the N52 for Europe only (it needs low-sulphur fuel). It shares the N54 fault list minus the turbos: piezo injectors, the high-pressure fuel pump and the NOx sensor/catalyst are the expensive items, plus oil leaks with age. Buy only with records showing late-index injectors and the pump already done."

M54

"The last of the simple BMW straight-sixes: smooth, linear and very long-lived (around 330,000 km with proper care). Nothing on it is known to destroy the engine; the bills are age-related plastics and seals - crankcase ventilation, cooling system, DISA flap, VANOS seals and oil leaks."

Issues Comparison

N53 7

▲ HIGH

High-pressure fuel pump failure N/A--N/A 24,000 km--161,000 km

▲ HIGH

Piezo injector failure — misfire and rough idle €220--€1,800 N/A--N/A

▲ HIGH

NOx sensor and NOx storage catalyst failure €400--€3,000 N/A--N/A

● MODERATE

Oil leaks and consumption — valve cover, breather, oil filter housing N/A--N/A N/A--N/A

○ MINOR

VANOS solenoid valve failure N/A--N/A N/A--N/A

○ MINOR

Carbon deposits on intake valves and injectors (direct injection) N/A--N/A N/A--N/A

○ MINOR

Ignition coil failure (2007-2008 service campaign) N/A--N/A N/A--N/A

M54 6

● MODERATE

Cooling system plastics — water pump, thermostat, expansion tank N/A--N/A 97,000 km--161,000 km

● MODERATE

DISA valve failure (intake manifold flap) N/A--N/A 113,000 km--161,000 km

● MODERATE

Double VANOS — solenoid and seal wear N/A--N/A N/A--N/A

● MODERATE

Crankcase ventilation (CCV) valve and hoses — oil consumption, false air €300--€700 120,000 km--N/A

○ MINOR

Oil leaks — valve cover, oil filter housing and oil pan gaskets N/A--N/A N/A--N/A

○ MINOR

Camshaft / crankshaft position sensor failure — stalling, rpm hunting N/A--N/A N/A--N/A

Models

N53 5

6 Series E63 2007--2010 5 Series E60 2007--2010 5 Series E60 2007--2010 3 Series E90 2007--2011 3 Series E90 2007--2012

M54 13

5 Series E60 2003--2007 3 Series E46 2001--2005 5 Series E39 2000--2003 5 Series E60 2003--2005 3 Series E46 2001--2005 5 Series E39 2000--2003 Z4 E85 2003--2005 X5 E53 2000--2006 5 Series E60 2003--2005 Z4 E85 2003--2005 3 Series E46 2001--2005 5 Series E39 2000--2003 Z3 E36/7 2000--2002