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 dynamic…
Production years 1999–2002 meet Euro 3 emissions standards . 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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 152 kg |
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.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from Porsche technical bulletins (1999–2002) and owner association failure logs (2003–2020). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M 44.41 is mechanically simple but early units (1999–2000) suffer from camshaft wear under high-RPM use. Later 2001–2002 models include hardened cams. Regular oil changes with 10W-40 A40 oil and avoiding sustained high-RPM operation greatly improve longevity.
Top issues include exhaust cam lobe wear, Bosch Motronic adaptation drift, valve cover oil leaks, and timing chain tensioner rattle. These are well-documented in Porsche service bulletins. The inline-four layout is unusual for Porsche, so parts specificity is critical.
Exclusively the 1999–2002 Porsche Boxster (986) base model with 170 PS, sold in Europe, Asia, and Australia—not offered in North America. It was replaced in 2003 by the 2.7L M96 flat-six across all markets.
Yes. Common upgrades include ECU remaps and performance cams, yielding 190–200 PS. However, the stock internals—especially early cams—have modest limits. Aggressive tuning risks lobe failure unless upgraded. Most owners prioritize drivability over power due to the engine’s entry-level role.
Approximately 10–12 L/100km (24–28 mpg UK) in mixed driving. Highway cruising can reach 8.5 L/100km (33 mpg UK), while aggressive use exceeds 14 L/100km due to the mid-engine layout and performance gearing.
Yes. The Porsche M 44.41 is an interference engine. If the timing chain fails or jumps, pistons will contact open valves, causing severe internal damage. Regular inspection of chain tensioners and guides is essential.
Porsche specifies 10W-40 synthetic oil meeting Porsche A40 standard. This viscosity ensures cam lobe and bearing protection under high-RPM stress. Change intervals should not exceed 15,000 km or annually.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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