The Porsche M97.01 is a 3,596 cc, water‑cooled flat‑six petrol engine produced between 2005 and 2008. It powered the rear — engine Porsche 997 — generation 911 Carrera and featured dual overhead camshafts (DOHC), four valves per cylinder, and Bosch Motronic ME 7.8 digital fuel injection. In standard form it delivered 239 kW (325 PS) and 370 Nm of torque, with a redline of 7,200 rpm.
Fitted to the 997 Carrera 2 and Carrera 4 (including Targa and Cabriolet), the M97.01 represent…
Production years 2005–2008 meet Euro 4 emissions standards (EU Directive 98/69/EC; VCA UK Type Approval #VCA/EMS/997C).
The Porsche M97.01 is a 3,596 cc water‑cooled flat‑six petrol engine engineered for the 997-generation 911 Carrera (2005–2008). It combines DOHC, 24-valve architecture with Bosch Motronic ME 7.8 digital injection to deliver high-revving power and smooth torque delivery. Designed to meet Euro 4 emissions standards, it improves upon the M96 platform with enhanced oiling and reduced IMS risk.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,596 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | Flat-6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 99.0 mm × 78.0 mm | |
Power output | 239 kW (325 PS) @ 6,800 rpm | |
Torque | 370 Nm @ 4,250 rpm | |
Fuel system | Bosch Motronic ME 7.8 sequential injection | |
Emissions standard | Euro 4 | |
Compression ratio | 11.3:1 | |
Cooling system | Water-cooled (with integrated oil cooler) | |
Turbocharger | None | |
Timing system | Chain-driven DOHC with hydraulic lifters | |
Oil type | Porsche Longlife 0W-40 (A40 specification) | |
Dry weight | 182 kg |
The Porsche M97.01 was used exclusively in Porsche's 997 platform with rear-mounted, longitudinal orientation and no external licensing. This engine received a critical IMS bearing update—oil-fed design from mid-2006—and all adaptations are documented in OEM technical bulletins.
The M97.01's primary reliability risk is IMS bearing wear in pre-mid-2006 units, with elevated incidence in high-mileage or infrequently serviced examples. Porsche internal data from 2007 indicated IMS-related oil contamination in under 6% of early 997s by 100,000 km, while UK DVSA records show generally strong reliability compared to 996-era engines. Oil quality and change intervals make lubrication integrity critical.
Analysis derived from Porsche technical bulletins (2005–2008) and UK DVSA failure statistics (2009–2023). 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 M97.01 is generally very reliable, especially post-mid-2006 models with the oil-fed IMS bearing. Pre-2006 units should be monitored for IMS wear, but failure rates are significantly lower than in M96-era engines. With regular oil changes using A40 0W-40 and proper coolant maintenance, it can exceed 200,000 km with minimal issues.
Top issues include VarioCam solenoid faults, rear main seal leaks, water pump impeller failure, and (in pre-2006 engines) IMS bearing wear. These are well-documented in Porsche service bulletin TSB-997-2006. Most are preventable with scheduled maintenance.
Exclusively the 2005–2008 Porsche 911 Carrera 2 and Carrera 4 (997), including Targa and Cabriolet body styles. It was never used in Turbo, GT3, or non-Carrera models. All are rear-engine, water-cooled layouts with 325 PS output.
Yes. Stage 1 (ECU remap, sport exhaust) yields ~345–350 PS. Full builds with cams, headers, and lightweight internals can reach 370+ PS. Stock internals are robust, but aggressive tuning should include upgraded cooling and oil systems for track use.
Typical consumption is 12–14 L/100km (24–20 mpg UK) in mixed driving. Highway cruising can reach 9.5 L/100km (30 mpg UK). Performance tuning increases consumption, but the engine remains efficient for a high-revving flat-six.
Yes. The M97.01 is an interference engine. If the timing chains fail or jump, pistons can contact open valves, causing severe internal damage. However, the chain system is robust if maintained with quality oil.
Porsche specifies 0W-40 synthetic oil meeting Porsche Longlife A40 (or newer C40) standards. Change every 15,000 km or annually. This oil ensures proper VarioCam function and IMS bearing protection.
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