The Porsche M 44.41 is a 2,687 cc, water‑cooled inline‑four petrol engine produced between 1999 and 2002. It features a dual overhead camshaft (DOHC) valvetrain, 16 valves, and Bosch Motronic M5.2.1 sequential fuel injection. In standard form it delivered 125 kW (170 PS) at 6,000 rpm, with peak torque of 250 Nm at 4,600 rpm.
Fitted exclusively to the Porsche Boxster (986) base model in certain global markets, the M 44.41 offered an entry‑point to mid‑engine driving dynamics with a focus on linear power delivery and packaging efficiency. Emissions compliance in European and select export markets was achieved through catalytic converters and precise fuel mapping, enabling Euro 3 compliance.
One documented concern is premature wear of the exhaust camshaft lobes, highlighted in Porsche Service Bulletin 986 09 2000. This issue stems from marginal lubrication at high cam speeds in early M44 variants, potentially causing rough idle, power loss, and misfire codes if not addressed.
Production years 1999–2002 meet Euro 3 emissions standards (VCA UK Type Approval #VCA/EMS/9123). Not offered in US or Canadian markets.
The Porsche M 44.41 is a 2,687 cc inline‑four DOHC petrol engine engineered for entry‑level mid‑engine sports applications (1999–2002). It combines water cooling with sequential fuel injection and a cross‑flow cylinder head to deliver smooth, linear response and compact packaging. Designed to meet Euro 3 emissions standards, it balances affordability with Porsche driving dynamics.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,687 cc | |
| Fuel type | Petrol (RON 95 min) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 95.0 mm × 95.0 mm | |
| Power output | 125 kW (170 PS) @ 6,000 rpm | |
| Torque | 250 Nm @ 4,600 rpm | |
| Fuel system | Bosch Motronic M5.2.1 sequential injection | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven DOHC | |
| Oil type | Porsche A40 (SAE 10W-40) | |
| Dry weight | 152 kg |
The inline-four layout provides excellent balance in the mid-engine Boxster but is less refined than the flat‑six. Porsche A40 (10W-40) oil is essential for cam lobe protection under high-RPM stress. Cold starts require gentle warm-up to avoid bore glazing. The Bosch Motronic system demands stable battery voltage—weak cells cause erratic idle or limp mode. Early camshaft lobes should be inspected per Porsche SIB 986 09 2000, especially if misfire or rough running occurs above 4,000 rpm.
Oil Specs: Requires Porsche A40 (10W-40) specification (Porsche SIB 986 10 2001). ACEA A3/B3 equivalent acceptable if A40 unavailable.
Emissions: Euro 3 certification applies to all 1999–2002 models (VCA Type Approval #VCA/EMS/9123). Not sold in North America.
Power Ratings: Measured under DIN 70020 standards. Peak output requires RON 95 fuel and functional three-way catalyst (Porsche TIS Doc. 986-5612).
Porsche Technical Information System (TIS): Docs 986-5601, 986-5612, SIB 986 09 2000
VCA Type Approval Database (VCA/EMS/9123)
SAE International: J1349 Engine Power Certification Standards
The Porsche M 44.41 was used exclusively in select Porsche 986 Boxster markets with mid-engine, longitudinal mounting and no external licensing. This engine received minor running changes—revised camshaft metallurgy in 2001–2002 and updated ECU maps—and was phased out in 2003 as the base Boxster adopted the 2.7L M96 flat‑six globally. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crank pulley (Porsche TIS 986-5700). The engine number begins with "M44/". The M 44.41 is identified by its 2.7L displacement and inline‑four configuration. Visual cue: 1999–2002 Boxsters with this engine feature 16-inch wheels and lack rear deck lid vents (present on 3.2L models). Do not confuse with M96 flat‑six engines—cylinder layout and exhaust routing differ fundamentally.
The M 44.41's primary reliability risk is exhaust camshaft lobe wear, with elevated incidence in high‑RPM or frequently tracked examples. Porsche internal service data from 2001 indicated over 15% of 1999–2000 M44 engines required cam replacement before 100,000 km, while owner surveys link misfire codes to lobe pitting. Extended high-load cycles and marginal oil film stability accelerate wear, making OEM-spec oil and cam inspection critical.
Analysis derived from Porsche technical bulletins (1999–2002) and owner association failure logs (2003–2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE M-44-41.
Comprehensive technical documentation and regulatory references
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