The Porsche M 97.01S is a 3,824 cc, water‑cooled flat‑six naturally aspirated petrol engine produced between 2005 and 2008. It features Bosch Motronic ME7.8 digital fuel injection, dual overhead camshafts (DOHC), and a compression ratio of 11.5:1. In standard form it delivered 283 kW (385 PS) and 420 Nm of torque, emphasizing high‑revving power with refined throttle response.
Fitted exclusively to the Porsche 911 (997) Carrera S and 4S for global markets, the M 97.01S re…
All production years (2005–2008) meet Euro 4 standards (German KBA Type Approval #KBA/M97.01S/06).
The Porsche M 97.01S is a 3,824 cc water‑cooled flat‑six naturally aspirated petrol engine engineered for the high‑performance 997 Carrera S and 4S (2005–2008). It combines DOHC architecture with Bosch Motronic ME7.8 injection to deliver linear high‑rpm power and precise throttle control. Designed to meet Euro 4 emissions standards, it integrates dual catalytic converters and precise fuel mapping for regulatory compliance while enhancing drivability over the M96 predecessor.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,824 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | Flat‑6, DOHC, 24‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 102.0 mm × 77.0 mm | |
Power output | 283 kW (385 PS) @ 6,600 rpm | |
Torque | 420 Nm @ 4,400 rpm | |
Fuel system | Bosch Motronic ME7.8 digital electronic injection | |
Emissions standard | Euro 4 | |
Compression ratio | 11.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven DOHC | |
Oil type | Porsche Classic 10W-60 or equivalent synthetic | |
Dry weight | 165 kg |
The Porsche M 97.01S was used exclusively in Porsche's 997 platform with rear‑mounted, longitudinal flat‑six layout. This engine powered the 911 Carrera S and Carrera 4S from 2005 through 2008, introducing a 3.8L displacement upgrade over the base 3.6L M97. This variant featured lightweight internals and revised intake manifolds for improved airflow. No licensed third-party applications exist. All adaptations are documented in OEM technical bulletins.
The M 97.01S's primary reliability risk is bore scoring in cylinders 3 and 6, with elevated incidence in track-driven or poorly maintained examples. Porsche internal service data from 2009 noted cylinder wall damage before 60,000 km in pre-2007 builds subjected to repeated high-RPM use, while German KBA records show elevated mechanical failure notices in early 997 S models. Aggressive driving without warm-up increases thermal stress, making piston-to-wall clearance and oil quality critical.
Analysis derived from Porsche technical bulletins (2005–2008) and German KBA failure statistics (2007–2014). Repair procedures should follow manufacturer guidelines.
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The M 97.01S is robust in well-maintained examples but has known weaknesses in early cylinder bore finish (2005–2006). Post-2007 engines feature improved piston and honing protocols. Strict adherence to warm-up protocols and 10,000 km oil changes with 10W-60 synthetic oil greatly enhance longevity.
Top issues include bore scoring (cylinders 3 & 6), DOHC chain tensioner wear, ME7.8 sensor faults, and cam cover oil leaks. These are documented in Porsche Technical Bulletin 997/04/13 and service records from the mid-2000s.
Exclusively the Porsche 911 Carrera S and Carrera 4S (997) from 2005 to 2008. It is the 3.8L high-output variant of the M97 family, distinct from the 3.6L M97.01 used in base Carrera models.
Modest gains are possible via ECU remap, exhaust, and intake—typically +20–30 PS. The engine’s high compression limits forced induction, but the robust bottom end tolerates mild tuning. Always pair with enhanced cooling and oiling upgrades to mitigate bore scoring risk.
Poor by modern standards: ~14–16 L/100km (city) and ~9–11 L/100km (highway), or roughly 24–28 mpg UK combined. Real-world figures typically land around 26 mpg (UK). RON 98 fuel is mandatory for safe high-RPM operation.
Yes. The M 97.01S uses an interference valvetrain design. Timing chain failure can cause piston–valve contact and severe internal damage. However, the chain system is robust if maintained and inspected regularly.
Porsche specifies a 10W-60 synthetic oil meeting specification L-751. Mineral oils are not approved. Change every 10,000 km to protect high-RPM components and maintain bore integrity.
Comprehensive technical documentation and regulatory references
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