The Porsche M 48.00 is a 2,687 cc, water — cooled flat‑six petrol engine produced between 2000 and 2005. It features dual overhead camshafts (DOHC), VarioCam variable valve timing, and Bosch Motronic ME 7.8 electronic fuel injection. In standard form it delivered 177 kW (240 PS) and 290 Nm of torque, providing responsive performance with a linear powerband for the entry — level 911 models.
Fitted to the Porsche 911 (996) Carrera and Carrera 4 base variants, the M 48.00 was eng…
All production years (2000–2005) meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/4800).
The Porsche M 48.00 is a 2,687 cc flat‑six DOHC petrol engine engineered for the 996-generation 911 (2000–2005). It combines VarioCam variable valve timing with Bosch Motronic electronic injection to deliver smooth, linear power and strong mid-range torque. Designed to meet Euro 3 from launch, it represents Porsche’s first water-cooled flat-six in the 911 lineage.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,687 cc | |
Fuel type | Petrol | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 96.0 mm × 76.4 mm | |
Power output | 177 kW (240 PS) @ 6,000 rpm | |
Torque | 290 Nm @ 4,600 rpm | |
Fuel system | Bosch Motronic ME 7.8 electronic injection | |
Emissions standard | Euro 3 | |
Compression ratio | 11.3:1 | |
Cooling system | Water-cooled with front-mounted radiator and oil cooler | |
Turbocharger | None | |
Timing system | Chain-driven DOHC with VarioCam | |
Oil type | Porsche C30 10W‑60 full synthetic | |
Dry weight | 181 kg |
The Porsche M 48.00 was used exclusively in Porsche's 996 platform with rear-engine, longitudinal mounting and no external licensing. This engine received platform-specific adaptations—revised oil pan baffling and updated IMS bearing from mid-2001—and from 2002 the X51 powerkit option offered enhanced output without altering core architecture, creating minor service nuances. All adaptations are documented in OEM technical bulletins.
The M 48.00's primary reliability risk is intermediate shaft (IMS) bearing failure in early production units, with elevated incidence in high-mileage or infrequently driven examples. Porsche internal service data from 2005 indicated IMS-related failures in ~8% of pre-August 2001 engines before 100,000 km, while UK DVSA MOT records show secondary air injection and chain guide wear as secondary concerns. Extended oil change intervals and low-RPM urban use accelerate IMS degradation, making oil quality and driving pattern critical.
Analysis derived from Porsche technical bulletins (2000–2005) and UK DVSA failure statistics (2005–2023). 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 48.00 is generally robust but carries IMS bearing risk in early (2000–mid-2001) examples. Post-2001 engines with dual-row IMS bearings are significantly more reliable. With proper oil changes (every 10,000 km), 98 RON fuel, and IMS inspection or upgrade, it can deliver long service life. Avoid infrequent use and short trips to minimize moisture buildup.
Top issues include IMS bearing failure (early units), secondary air injection pump seizure, rear main seal leaks, and timing chain guide wear. These are documented in Porsche TSB‑996‑02‑07 and TIS repair guides. IMS and RMS issues are the most critical for engine longevity.
The M 48.00 powered the base Porsche 911 (996) Carrera and Carrera 4 from 2000 to 2005. It was not used in Turbo, GT3, or Targa models, which used larger or more specialized variants. No external manufacturers used this engine.
Yes—ECU remaps and exhaust upgrades yield 260–270 PS safely on stock internals. The X51 powerkit (factory option) delivered 256 PS via camshafts and intake revisions. Forced induction is possible but requires bottom-end reinforcement. Most owners focus on reliability over significant tuning.
Real-world consumption is ~12–14 L/100km (20–23 mpg UK) in mixed driving. Highway cruising yields ~9.5 L/100km (30 mpg UK). High compression and performance tuning limit efficiency, but it’s typical for a 240 PS flat-six of its era.
Yes. The M 48.00 is an interference engine. If the timing chain jumps or fails, piston-to-valve contact can occur, causing severe internal damage. However, chain failures are rare if oil and guides are maintained. IMS failure can also cause timing disruption.
Porsche specifies 10W‑60 full synthetic oil meeting Porsche C30 standards. This high-viscosity oil is critical for IMS and cam bearing protection. Change every 10,000 km or annually, and never use lower-viscosity oils, which increase IMS wear risk.
Comprehensive technical documentation and regulatory references
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