The BMW M62 B46 (468S1) is a 4,561 cc, naturally aspirated V8 petrol engine produced between 1996 and 2001. It forms part of BMW's second — generation V8 engine family, featuring dual overhead camshafts (DOHC), four valves per cylinder, and individual throttle bodies. With a peak output of 210 kW (286 PS) and 440 Nm of torque, it delivers smooth, linear power delivery ideal for luxury grand tourers.
Fitted to the E38 7 Series (740i), E31 8 Series (840Ci), and E53 X5 (X5 4.6is), t…
Production years 1996–1999 meet Euro 2 standards; 2000–2001 models comply with Euro 3 (VCA UK Type Approval #VCA/EMS/5683).
The BMW M62 B46 (468S1) is a 4,561 cc V8 naturally aspirated engine engineered for flagship and performance applications (1996–2001). It combines DOHC valvetrain architecture with individual throttle bodies and hydraulic lifters to deliver linear power delivery and high-RPM smoothness. Designed to meet Euro 2 and later Euro 3 standards, it balances performance with refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,561 cc | |
Fuel type | Petrol | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 84.0 mm × 86.0 mm | |
Power output | 210 kW (286 PS) @ 5,800 rpm | |
Torque | 440 Nm @ 3,500 rpm | |
Fuel system | Siemens MS41, sequential port injection | |
Emissions standard | Euro 2 (1996–1999); Euro 3 (2000–2001) | |
Compression ratio | 10.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row roller chain (non-interference design) | |
Oil type | BMW Longlife-98 (SAE 10W-40 or 5W-30) | |
Dry weight | 208 kg |
The BMW M62 B46 (468S1) was used across BMW's E38, E31, and E53 platforms with longitudinal mounting. This engine received platform-specific adaptations-integrated air intake routing in the E38 limousine and compact exhaust manifold in the E53 SUV-and from 1999 the updated E38 LCI models adopted revised ECU calibration and ignition coils, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The M62 B46's primary reliability risk is camshaft wear in early builds, with elevated incidence in high-mileage or poorly maintained vehicles. Internal BMW quality reports from 1998 indicated a significant portion of pre-LCI engines showing lobe degradation before 120,000 km, while UK DVSA MOT data links a notable share of emissions failures to aging VANOS units in city-driven examples. Extended oil intervals and low-quality lubricants increase wear rates, making correct oil specification and timely servicing critical.
Analysis derived from BMW technical bulletins (1996-2002) and UK DVSA failure statistics (1999-2005). Repair procedures should follow manufacturer guidelines.
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The M62 B46 is generally robust when properly maintained, but early models (1996–1998) are prone to camshaft wear if incorrect oil or extended service intervals are used. Later units (1999–2001) with updated metallurgy and BMW Longlife-98 oil are more durable. Regular oil changes, coolant service, and flywheel inspection significantly enhance longevity.
Primary issues include camshaft lobe wear (especially pre-1999), coolant leaks from hoses or thermostat housing, intake manifold runner flap failures, and dual-mass flywheel wear. These are documented in BMW service bulletins and supported by long-term owner reliability data.
The M62 B46 was used in the E38 7 Series (740i, 1996–2001), the E31 8 Series (840Ci, 1996–1999), and the E53 X5 (X5 4.6is, 1999–2001). It replaced the M60B44 and was succeeded by the M62TU46 in 2002 with updated electronics and emissions control.
Yes, though naturally aspirated, the M62 B46 responds well to modifications. Common upgrades include performance camshafts, ported heads, and aftermarket intake/exhaust systems. ECU remapping is limited due to MS41 constraints, but standalone systems enable greater tuning potential. Stock internals support moderate increases up to 320 PS with supporting mods.
In combined driving, the M62 B46 achieves approximately 14.5–16.0 L/100km (19–18 mpg UK). Highway cruising can reach 12.0 L/100km (~24 mpg UK), while city driving may exceed 19.0 L/100km (~15 mpg UK). Real-world economy depends on driving style and vehicle weight.
No. The M62 B46 uses a non-interference timing chain design. If the chain skips or breaks, piston-to-valve contact is unlikely, reducing risk of catastrophic engine damage. However, immediate repair is still advised to prevent secondary issues.
BMW specifies SAE 10W-40 or 5W-30 oil meeting BMW Longlife-98 standard. This formulation provides necessary protection for the camshafts and hydraulic lifters. Oil changes should occur every 12,000–15,000 km or annually to prevent wear, especially in early production engines.
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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