The Porsche MCW.AA is a 3,598 cc, twin‑turbocharged V6 petrol engine introduced in 2024 for the refreshed Panamera and Cayenne performance trims. It features port and direct fuel injection (PD‑FI), variable valve timing (VarioCam Plus), and an integrated dry‑sump lubrication system for enhanced high‑g stability. In current applications it delivers 331 kW (450 PS) and 600 Nm of torque, offering immediate throttle response and refined mid‑range flexibility.
Fitted to the Panamera 4S (G2 II) and Cayenne S (E3 II), the MCW.AA replaces the previous MCY.AA unit with optimized thermal management and updated turbo geometry. Emissions compliance is achieved via a gasoline particulate filter (GPF), cooled exhaust gas recirculation (EGR), and precise engine management calibrated to meet Euro 6d standards across all markets.
One documented concern is intermittent misfire under high‑load, high‑altitude conditions, highlighted in Porsche Service Bulletin G2‑24‑112. This behavior is attributed to transient fuel pressure instability in the high‑pressure fuel pump control loop during rapid throttle transitions. Porsche implemented a revised rail pressure map and updated pump calibration starting Q1 2025.
All production years (2024–present) meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9879).
The Porsche MCW.AA is a 3,598 cc twin‑turbocharged V6 engineered for luxury performance sedans and SUVs (2024–present). It combines port and direct injection with a dry‑sump system to deliver responsive torque and high‑rpm refinement. Designed to meet Euro 6d, it balances dynamic performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,598 cc | |
| Fuel type | Petrol (RON 98 min) | |
| Configuration | V6, DOHC, 24‑valve | |
| Aspiration | Twin‑turbocharged | |
| Bore × stroke | 95.0 mm × 84.4 mm | |
| Power output | 331 kW (450 PS) @ 6,400 rpm | |
| Torque | 600 Nm @ 2,000–5,000 rpm | |
| Fuel system | Combined port and direct injection (Bosch HDEV6) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Dual‑circuit water‑cooled with oil cooler | |
| Turbocharger | Twin mono‑scroll turbos (BorgWarner) | |
| Timing system | Chain‑driven DOHC with hydraulic tensioners | |
| Oil type | Porsche C4 (SAE 0W‑40) | |
| Dry weight | 191 kg |
The twin‑turbo V6 delivers potent low‑end torque and seamless mid‑range thrust but requires minimum RON 98 fuel to prevent knock under load. Porsche C4 (0W‑40) oil is mandatory for dry‑sump integrity and turbo bearing protection. High‑altitude or aggressive throttle use may induce misfire in pre‑Q1‑2025 builds due to fuel rail pressure instability. Revised calibration introduced in early 2025 resolves this; earlier engines should receive the updated ECU map per SIB G2‑24‑112. GPF regeneration is automatic but frequent short trips may require extended highway driving to complete cycles.
Oil Specs: Requires Porsche C4 (0W‑40) specification (Porsche Owner's Manual G2 II Panamera 4S). Meets ACEA C3 with Porsche-specific high-shear stability requirements.
Emissions: Euro 6d certification applies to all 2024–present models (VCA Type Approval #VCA/EMS/9879). Includes real-driving emissions (RDE) compliance.
Power Ratings: Measured under ISO 1585 standards. Full 331 kW output requires RON 98 or higher (Porsche TIS Doc. PG2-MCW-AA-01).
Porsche Technical Information System (TIS): Docs PG2-MCW-AA-01, PG2-MCW-AA-02, SIB G2-24-112
VCA Type Approval Database (VCA/EMS/9879)
ISO 1585: Road vehicles – Engine test code
The Porsche MCW.AA was developed for Porsche's G2 II and E3 II platforms with longitudinal mounting and no third‑party licensing. This engine received platform-specific adaptations—enhanced oil scavenging in the Cayenne S for off‑camber stability and revised intake silencing in the Panamera 4S for cabin refinement—and from Q1 2025 the fuel system calibration update, creating minor production splits. All adaptations are documented in OEM technical bulletins.
Engine code 'MCW.AA' is laser-etched on the front engine cover near the accessory drive pulley (Porsche TIS PG2-ID-09). The 10th VIN digit corresponds to model year; full engine ID is encoded in the QR label on the right strut tower linked to Porsche PIWIS. Pre-Q1-2025 engines use fuel rail pressure map version 4.1; post-update units use version 4.3 with revised transient control. No other Porsche models use this engine code.
The MCW.AA's primary reliability consideration is transient misfire under high‑load, high‑altitude conditions, with internal Porsche telemetry (2024) indicating a 5% incidence rate in pre‑Q1‑2025 G2 II vehicles operating above 1,500 m elevation. No mechanical damage occurs, but drivability is affected. Urban or low‑elevation driving shows no elevated risk. The revised ECU calibration mitigates this issue completely.
Analysis derived from Porsche technical bulletins (2024–2025) and UK DVSA failure statistics (2024–2025). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MCW-AA.
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PORSCHE Official Site
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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