BMW M62B46 Engine

  1. Specifications
  2. Overview, problems
  3. Performance tuning

M62B46 Specs

Manufacturer  BMW Plant Dingolfing
Also called BMW M62
Production 2001-2003
Cylinder block alloy Aluminum
Configuration V8
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 85 (3.35)
Cylinder bore, mm (inch) 93 (3.66)
Compression ratio 10.5
Displacement 4619 cc (281.9 cu in)
Power output 255 kW (347 HP) at 5,700 rpm
Torque output 480 Nm (354 lb·ft) at 3,700 rpm
Redline 6,500 rpm
HP per liter 75.1
Fuel type Gasoline
ECU Bosch DME M7.2
Weight, kg (lbs) 208 (460)
Fuel consumption, L/100 km (mpg)

for E53 X5
21.0 (11.2)
11.4 (20.6)

14.9 (15.8)
Turbocharger   Naturally aspirated
Oil consumption , L/1000 km
(qt. per miles)
up to 1.0
(1 qt. per 750 miles)
Recommended engine oil 5W-30
Engine oil capacity, L (qt.) 8.0 (8.45)
Oil change interval, km (miles) 7,000-10,000
Normal engine operating temperature, °C (F) ~105 (220)
Engine lifespan, km (miles)
-Official information

400+ (250)
Tuning, HP
-Max HP
-No life span loss


The engine is installed in BMW X5 E53
Alpina B10 V8
Alpina Roadster V8 E52
Morgan Aero 8

BMW M62B46 engine reliability, problems and repair

In 1999 BMW X5 E53 appeared, and it quickly won the reputation of a dynamic sport utility vehicle. The power of the standard BMW 4.4 engine M62B44 seemed not being enough for it. To make the car still more high-speed, Alpina company developed the new engine M62B46. It was constructed on the basis of the engine block M62B44. The diameter of its cylinders was expanded in 1 mm. Also the new crankshaft was installed there. Its piston stroke was enlarged to 85 mm, and Mahle pistons and modified rods were used. Besides, the cylinder head gaskets, inlet and outlet camshafts, the covers and the engine pan were replaced.
The specs of the stock camshafts of the M62B46 are the following: duration 249/249 deg, lift 10.5/10.5 mm. The diameter of the valves has remained the same: the inlet are 35mm, and the outlet are 30,5 mm. The engine control unit is Bosch DME M7.2.
This engine was used for the models BMW X5 E53, Alpina B10 V8/V8S E39, Alpina Roadster V8 E52 and Morgan Aero 8.

Later, just in two years since it was launched, the engine M62B46 was replaced with the new BMW N62B48.

BMW M62B46 (Alpina) engine problems and drawbacks

The motor M62 B46 may have the same malfunctions, advantages and shortcomings as 4.4-liter M62B44. You can read about all major problems HERE.

BMW M62 B46 engine tuning

The M62B46 Supercharger

Tuning M62B46 is similar to M62B44. Learn more detailed about it HERE.