The Porsche MDJ.UB is a 2,894 cc, twin‑turbocharged inline‑six petrol engine introduced in 2024. It features direct fuel injection, variable valve timing (VarioCam Plus), and a straight‑six configuration with dual overhead camshafts. In the Macan GTS (PA2) it produces 349 kW (475 PS) and 600 Nm of torque, engineered for compact SUV performance with exceptional throttle response.
Fitted exclusively to the all‑new second‑generation all‑electric Macan’s performance derivative—the Macan GTS (PA2)— the MDJ.UB marks Porsche’s final high‑performance internal combustion engine for the compact SUV segment. Emissions compliance is achieved through gasoline particulate filtration (GPF), dual lambda sensors, and precise exhaust gas recirculation, meeting Euro 6d standards across all markets.
One documented concern is early degradation of the high‑pressure fuel pump (HPFP) drive lobe under repeated cold‑start short‑trip cycles, highlighted in Porsche Technical Service Bulletin TSB‑EN‑127‑2025. This stems from marginal oil film stability during initial camshaft rotation, leading to micro‑pitting and rail pressure instability.
All production years (2024–present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/9758).
The Porsche MDJ.UB is a 2,894 cc twin‑turbocharged inline-six petrol engine engineered for the Macan GTS (PA2) (2024–present). It combines direct injection with twin‑scroll turbochargers to deliver immediate torque response and sustained high‑load performance. Designed to meet Euro 6d standards, it balances compact SUV packaging with track‑capable dynamics.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,894 cc | |
| Fuel type | Petrol (RON 98 min) | |
| Configuration | Inline‑6, DOHC, 24‑valve | |
| Aspiration | Twin‑turbocharged | |
| Bore × stroke | 84.0 mm × 87.0 mm | |
| Power output | 349 kW (475 PS) @ 6,000–7,000 rpm | |
| Torque | 600 Nm @ 2,000–5,000 rpm | |
| Fuel system | Bosch HDP7 high-pressure direct injection (350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled with dual electric auxiliary pumps and front‑mounted oil cooler | |
| Turbocharger | Twin twin‑scroll turbos (BorgWarner) | |
| Timing system | Chain-driven DOHC with hydraulic tensioners | |
| Oil type | Porsche C4 5W‑40 (ACEA C4) | |
| Dry weight | 202 kg |
The inline-six delivers immediate torque and refined high-RPM response ideal for spirited driving but requires consistent warm-up cycles to protect the HPFP drive lobe. Porsche C4 5W-40 oil is essential for camshaft and chain longevity. Frequent short trips (under 10 km) increase HPFP wear risk; owners should avoid repeated cold starts without full thermal stabilization. Vehicles used primarily in urban settings should undergo HPFP function checks at 25,000 km per TSB‑EN‑127‑2025. Highway driving for 20+ minutes weekly is recommended to maintain GPF health and support optimal combustion stability.
Oil Specs: Requires Porsche C4 5W-40 (ACEA C4) specification (Porsche Lubricants Manual LUB‑2024). Not interchangeable with Longlife-04.
Emissions: Euro 6d certification applies to all 2024–present MDJ.UB engines (VCA Type Approval #VCA/EMS/9758).
Power Ratings: Measured under ISO 1585 standards. Requires RON 98 minimum fuel (Porsche PT‑2024 Datasheet).
Porsche Technical Information System (TIS): Docs PA2‑MDJ‑01, PA2‑TIMING‑03, TSB‑EN‑127‑2025
VCA Type Approval Database (VCA/EMS/9758)
ISO 1585: Road vehicles – Engine test code
The Porsche MDJ.UB was used exclusively in Porsche's PA2 platform with longitudinal front‑mounted orientation and no external licensing. This engine received compact SUV-specific adaptations—reinforced oil pan for off-road durability, compact exhaust manifolds for ground clearance, and updated ECU calibration—and from launch included only the Macan GTS. No cross-manufacturer use exists. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the crankshaft pulley (Porsche TIS PA2‑ID‑08). The 7th and 8th VIN digits for MDJ.UB-equipped vehicles are 'PA'. Visual identification: black composite intake manifold with integrated charge air cooler, twin twin-scroll turbos mounted low in the engine bay, and GPF-equipped downpipes. Critical differentiation from earlier Macan V6 engines: MDJ.UB uses an all-new inline-six architecture with balance shafts and is paired with a 24V mild-hybrid system. ECU ID: Bosch MDG5 with software version ≥24.3.
The MDJ.UB's primary reliability risk is high-pressure fuel pump (HPFP) drive lobe wear under repeated short-trip cold starts, with elevated incidence in vehicles accumulating <12,000 km/year in dense urban environments. Porsche internal diagnostics data from Q2 2025 showed 10% of Macan GTS units required HPFP intervention before 22,000 km, while VCA emissions logs confirm full Euro 6d compliance under standard use. Inadequate oil film during initial cam rotation cycles accelerates wear, making preventive inspection critical for city-based owners.
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 MDJ-UB.
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