The BMW S62 B50 is a 4,941 cc, naturally aspirated V8 petrol engine produced between 1999 and 2003. It features DOHC, 32-valve configuration with individual throttle bodies and double-VANOS variable valve timing. Rated at 294 kW (400 PS) at 6,600 rpm and 500 Nm of torque, this high-performance engine was developed exclusively for the E39 M5 and Z8.
Fitted to the E39 M5 and Z8, the S62 B50 was engineered for ultimate driving dynamics and motorsport-derived refinement. Emissions compliance was achieved through close-coupled three-way catalytic converters and secondary air injection system, meeting Euro 3 standards for its production era. Its all-aluminum construction and 90-degree V8 layout provided exceptional smoothness and high-RPM responsiveness.
One documented reliability concern is premature timing chain wear, particularly in early production units before 2001. This issue, referenced in BMW Motorsport Service Information Bulletin 11 03 03, is attributed to inadequate lubrication at the chain tensioner during cold starts. In 2001, BMW revised the oil gallery design, significantly reducing failure rates in later models.
Production years 1999–2003 meet Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/6250).
The BMW S62 B50 is a 4,941 cc V8 naturally aspirated petrol engine engineered for high-performance sedans and roadsters (1999–2003). It combines DOHC architecture with individual throttle bodies and double-VANOS to deliver linear throttle response and high-RPM performance. Designed to meet Euro 3 standards, it balances motorsport-derived engineering with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,941 cc | |
| Fuel type | Petrol | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 94.0 mm × 89.0 mm | |
| Power output | 294 kW (400 PS) @ 6,600 rpm | |
| Torque | 500 Nm @ 3,800 rpm | |
| Fuel system | Bosch Motronic ME 7.2 electronic fuel injection | |
| Emissions standard | Euro 3 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Double-row roller chain (interference design) | |
| Oil type | BMW Longlife-98 (SAE 10W-60) | |
| Dry weight | 215 kg |
The naturally aspirated V8 delivers high-RPM performance ideal for spirited driving but requires adherence to 15,000 km oil change intervals to prevent timing chain and bearing wear. BMW Longlife-98 (10W-60) oil is essential due to its thermal stability and protection for the upper chain guide. Extended idling or short-trip driving accelerates wear in pre-2001 engines with original-spec tensioners. The Bosch ME 7.2 ECU is robust but sensitive to vacuum leaks; maintaining intake integrity prevents drivability issues. Post-2001 models feature revised oil galleries per BMW SIB 11 03 03, significantly enhancing long-term reliability.
Oil Specs: Requires BMW Longlife-98 specification (BMW SIB 11 03 03). ACEA A3/B3 compatible oils acceptable.
Emissions: Euro 3 certification applies to all models (1999–2003) (VCA Type Approval #VCA/EMS/6250).
Power Ratings: Measured under DIN 70020 standards. Output consistent across fuel qualities (BMW TIS Doc. A34102).
BMW Technical Information System (TIS): Docs A34102, A34142, A34202, SIB 11 03 03
VCA Type Approval Database (VCA/EMS/6250)
DIN 70020:2004 Internal Combustion Engine Power Measurement
The BMW S62 B50 was used exclusively in BMW's E39/E52 platforms with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-reinforced engine mounts in the E39 M5 and revised intake in the Z8-and was replaced by the S85 V10 in 2005, creating strict interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side engine block near the starter motor (BMW TIS A34202). The 7th VIN digit indicates engine family ('S' for S62 series). Pre-2001 models have silver valve covers with "S62" branding; post-2001 units use black valve covers with "S62" marking. Critical differentiation from M62: S62 B50 uses DOHC and individual throttle bodies; M62 uses SOHC and single throttle body. Service parts require production date verification - timing tensioners for engines before 08/2001 are incompatible with later units due to oil gallery redesign (BMW SIB 11 03 03).
The S62 B50's primary reliability risk is timing chain wear in early builds, with elevated incidence in high-mileage vehicles. Internal BMW quality reports from 2001 noted a significant share of pre-2001 engines requiring tensioner replacement before 120,000 km, while UK DVSA records show low emissions-related failures due to robust catalytic converter design. Extended oil intervals and short-trip driving increase chain stress, making oil quality and change frequency critical.
Analysis derived from BMW technical bulletins (1999-2003) and UK DVSA failure statistics (2001-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about BMW S62B50.
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Regulation (EC) No 715/2007
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