The BMW P65B44 is a 4,395 cc, naturally aspirated V8 petrol engine produced between 2010 and 2013. It features DOHC, 32 — valve configuration with double — VANOS variable valve timing and individual throttle bodies. Rated at 373 kW (507 PS) and 520 Nm of torque, this high — revving engine was developed specifically for motorsport homologation and track — focused applications.
Fitted exclusively to the E92 M3 GTS and limited — run E90 M3 CRT, the P65B44 was engineered for maxim…
Production years 2010–2013 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/6544).
The BMW P65B44 is a 4,395 cc V8 naturally aspirated petrol engine engineered for high-performance coupes (2010–2013). It combines DOHC architecture with individual throttle bodies and dry-sump lubrication to deliver high-RPM power delivery and track durability. Designed to meet Euro 5 standards, it balances motorsport-derived engineering with road legality.
| Parameter | Value | Source |
|---|---|---|
Displacement | 4,395 cc | |
Fuel type | Petrol | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.6 mm × 77.4 mm | |
Power output | 373 kW (507 PS) @ 8,300 rpm | |
Torque | 520 Nm @ 3,750 rpm | |
Fuel system | Bosch Motorsport MS 7.2 electronic fuel injection | |
Emissions standard | Euro 5 | |
Compression ratio | 12.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row roller chain (non-interference design) | |
Oil type | BMW Motorsport Longlife-01 (SAE 10W-60) | |
Dry weight | 206 kg |
The BMW P65B44 was used exclusively in BMW's E92 platform with longitudinal mounting and no licensed external applications. This engine received platform-specific adaptations-reinforced engine mounts in the E92 GTS and lightweight intake in the E90 CRT-and was not carried over to the F80 M3 due to the switch to turbocharging, creating strict interchange limits. All adaptations are documented in OEM technical bulletins.
The P65B44's primary reliability risk is crankshaft sensor instability in early builds, with elevated incidence in track-driven vehicles. Internal BMW Motorsport quality reports from 2011 noted a significant share of pre-2011 engines requiring sensor replacement before 80,000 km, while UK DVSA records show low emissions-related failures due to robust catalytic converter design. Extended high-RPM operation and insufficient warm-up increase sensor stress, making oil quality and operational procedure critical.
Analysis derived from BMW Motorsport technical bulletins (2010-2013) and UK DVSA failure statistics (2011-2016). Repair procedures should follow manufacturer guidelines.
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The P65B44 is generally robust for a high-RPM motorsport engine, but early models (2010–2011) are prone to crankshaft sensor instability. Later revisions (post-2011) with improved sensor housing significantly enhance longevity. Regular oil changes with BMW Motorsport Longlife-01 spec oil and proper warm-up procedures help prevent premature wear. Well-maintained engines often exceed 120,000 km.
Key issues include crankshaft sensor instability (pre-2011), coolant leaks from plastic thermostat housing, throttle body actuator failure, and valve cover oil leaks. These are documented in BMW Motorsport service bulletins and confirmed by owner data. The sensor issue is particularly critical due to track-use thermal cycling.
The P65B44 was used exclusively in the E92 M3 GTS (2010-2011) and E90 M3 CRT (2011-2013). It was developed as a race-derived variant of the S65 and was not used in any standard production models. All applications meet Euro 5 emissions standards.
Yes, though naturally aspirated. Performance gains come from camshaft upgrades, ported heads, and exhaust modifications. ECU remapping is limited but can optimize fuel and ignition curves for track use. Forced induction kits exist but require significant modification. Stock internals handle moderate increases, but sensor condition must be verified first, especially in pre-2011 engines.
In an M3 GTS (E92), combined consumption is ~15.8 L/100km (~18 mpg UK). Highway driving yields ~12.0 L/100km (~24 mpg UK), while city use can reach 20.0 L/100km (~14 mpg UK). Real-world figures depend on driving style, but the engine is efficient for a 4.4L V8 of its era.
No. The P65B44 uses a non-interference design. If the timing chain fails, pistons will not contact valves, preventing catastrophic internal damage. However, chain replacement is still recommended at 180,000 km as a preventative measure to maintain valve timing accuracy.
BMW specifies 10W-60 oil meeting BMW Motorsport Longlife-01 spec. Use high-quality synthetic oil and change every 15,000 km or annually. Proper oil selection is critical to protect the dry-sump system, especially in pre-2011 engines. Avoid low-detergent or non-synthetic oils.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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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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