The Porsche MDH.KA is a 2,894 cc, twin‑turbocharged V6 petrol engine introduced in 2021 for the Cayenne GTS (9YA) and Panamera GTS (971.2). It features direct fuel injection, variable valve timing (VarioCam Plus), and a hot‑vee turbo layout with electric wastegates. In standard form it delivers 340 kW (460 PS) with torque of 620 Nm, engineered for rapid throttle response and sporty character without extreme track focus.
Fitted to the Cayenne GTS and Panamera GTS, the MDH.…
All production years (2021–present) meet Euro 6d standards .
The Porsche MDH.KA is a 2,894 cc V6 twin‑turbo petrol engine engineered for GTS variants of the Cayenne and Panamera (2021–present). It combines a hot‑vee turbo architecture with VarioCam Plus to deliver immediate torque and refined sporty dynamics. Designed to meet Euro 6d emissions, it balances performance with regulatory compliance and everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,894 cc | |
Fuel type | Petrol (RON 98 min) | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Twin‑turbocharged (hot‑vee) | |
Bore × stroke | 85.0 mm × 86.0 mm | |
Power output | 340 kW (460 PS) @ 6,100 rpm | |
Torque | 620 Nm @ 2,300–4,500 rpm | |
Fuel system | Direct injection (up to 350 bar) | |
Emissions standard | Euro 6d | |
Compression ratio | 10.5:1 | |
Cooling system | Dual‑circuit water‑cooled | |
Turbocharger | Twin BorgWarner e‑wastegate units (hot‑vee) | |
Timing system | Chain‑driven DOHC with hydraulic tensioner | |
Oil type | Porsche C4 (SAE 0W‑40) | |
Dry weight | 183 kg |
The Porsche MDH.KA is used exclusively in Porsche's 971.2 and 9YA GTS platforms with longitudinal front‑mounting. This engine features model-specific intake tuning, exhaust backpressure profiles, and revised boost maps—and from early 2022, updated cold-start fuel logic—creating strict interchange limits. No licensing partnerships exist. All adaptations are documented in OEM technical bulletins.
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The MDH.KA's primary reliability concern is early-production cold-start fuel delivery instability in low ambient temperatures. Porsche internal data from Q1 2022 indicated a subset of pre-March 2022 Cayenne GTS units exhibited hard-start or misfire after overnight parking below 10°C, while no structural failures have been reported. Thermal cycling and strict oil compliance make fluid quality and software updates critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 MDH.KA is engineered for sporty daily use with robust internals and precise thermal management. Early 2021–2022 units had minor cold-start fueling issues, now resolved via ECU update. With proper oil changes (Porsche C4 0W‑40) and balanced driving that includes highway use, long-term reliability is expected to be strong.
Main issues are cold-start fuel priming instability (pre-03/2022 builds), GPF clogging from short urban trips, turbo oil return line carbon buildup, and VarioCam solenoid sticking. All are documented in Porsche SIBs 9YA‑02‑22 and 971‑09‑22, with official fixes available.
Exclusively the Cayenne GTS (9YA) and Panamera GTS (971.2), both from 2021–present. No other Porsche or partner vehicles use this engine.
Aftermarket ECU tuning is common on the MDH-KA platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Official combined: 11.9 L/100km (~24 mpg UK). Real-world mixed use typically yields 14–16 L/100km (20–18 mpg UK). Aggressive driving can exceed 19 L/100km. Requires RON 98 minimum for full performance and engine protection.
Yes. Like all modern Porsche V6 engines, the MDH.KA is an interference design. Timing failure would cause catastrophic valve-piston contact. However, it uses a maintenance-free chain with hydraulic tensioning—failures are extremely rare when oil is maintained.
Porsche C4 specification (SAE 0W‑40) synthetic oil. Must meet Porsche’s HTHS and low-SAPS requirements. Change every 15,000 km or 12 months. Never use non-C4 oils.
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
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VCA Certification Portal
Type-approval guidance and documentation.
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