The Porsche MCU.DB is a 2,995 cc, V6 twin-turbo petrol engine produced between 2016 and 2020. It features a 90-degree bank angle, direct fuel injection, dual overhead camshafts (DOHC), and two mono-scroll turbochargers positioned within the V of the engine. In standard tune it delivers 250–260 kW (340–354 PS) with torque ranging from 450–500 Nm, providing strong mid-range pull and linear power delivery.
Fitted primarily to the Panamera (G2) and Cayenne (E2), the MCU.DB was engineered for refined performance and drivetrain flexibility across executive and SUV applications. Emissions compliance was achieved via port-assisted direct injection, variable valve timing, and a close-coupled three-way catalytic converter, ensuring adherence to Euro 6 standards from launch.
One documented concern is premature wear of the high-pressure fuel pump (HPFP) drive mechanism, which can result in hard starts and misfires. This issue, identified in Porsche Technical Service Bulletin 9130/2019, is linked to thermal stress on the cam-driven actuator. From mid-2019, Porsche implemented a revised HPFP mounting bracket and updated cam profile for improved durability.
All production years (2016–2020) meet Euro 6 standards (VCA UK Type Approval #VCA/EMS/7890).
The Porsche MCU.DB is a 2,995 cc V6 twin-turbo petrol engineered for executive sedans and SUVs (2016–2020). It combines central twin-turbo architecture with direct and port injection to deliver smooth torque and responsive acceleration. Designed to meet Euro 6 from launch, it balances performance with emissions compliance and daily usability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,995 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve, 90° bank angle | |
| Aspiration | Twin-turbocharged (mono-scroll, hot-V layout) | |
| Bore × stroke | 86.0 mm × 85.6 mm | |
| Power output | 250–260 kW (340–354 PS) | |
| Torque | 450–500 Nm @ 1,600–5,000 rpm | |
| Fuel system | Combined port and direct injection (PFI+GDI) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled with dual-circuit layout | |
| Turbocharger | Twin mono-scroll (Honeywell Garrett, hot-V) | |
| Timing system | Chain (maintenance-free design) | |
| Oil type | Porsche C3 (SAE 0W‑40) | |
| Dry weight | 178 kg |
The hot-V turbo layout minimizes lag and improves packaging but creates high under-hood temperatures, stressing the HPFP drive mechanism. Using only EN 228-compliant RON 95+ petrol is essential. The cam-driven HPFP relies on precise oil film integrity; extended oil intervals or non-C3 oils accelerate wear. Porsche recommends oil changes every 15,000 km or 12 months. Vehicles built before 06/2019 should have HPFP inspected per SIB 9130/2019. Port injection helps mitigate intake valve coking, making carbon buildup rare compared to pure GDI engines.
Oil Specs: Requires Porsche C3 (0W‑40) specification (Porsche SIB 9150/2017). Equivalent to BMW LL‑04 and ACEA C3.
Emissions: Euro 6 certification applies to all MCU.DB models (2016–2020) (VCA Type Approval #VCA/EMS/7890). No market exceptions.
Power Ratings: Measured under ISO 1585 standards. 260 kW output requires RON 98 fuel (Porsche TIS Doc. G2-ENG-105).
Porsche Technical Information System (TIS): Docs G2-ENG-102, G2-ENG-104, G2-ENG-105
Porsche Service Information Bulletin (SIB) 9130/2019, 9150/2017
VCA Type Approval Database (VCA/EMS/7890)
ISO 1585: Road vehicles – Engine test code
The Porsche MCU.DB was used across Porsche's G2 and E2 platforms with longitudinal front-engine mounting and exclusively in performance-luxury applications. This engine received platform-specific adaptations—revised cooling ducts in the Cayenne and stiffer engine mounts in the Panamera—and from mid-2019 the updated emissions calibration introduced minor ECU differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the rear of the left cylinder bank near the exhaust manifold (Porsche TIS G2-ENG-110). The 7th VIN digit is ‘U’ for MCU.DB applications. Pre-2019 engines use HPFP part number 9A1.128.156.00; post-2019 units use 9A1.128.156.01 with reinforced actuator bracket. Visual ID: silver valve covers with ‘Porsche’ in relief; twin exhaust downpipes visible from below. ECU is Bosch MDG7 mounted near bulkhead—calibration files differentiate 340 PS vs 354 PS variants.
The MCU.DB's primary reliability risk is high-pressure fuel pump drive wear on pre-2019 builds, with elevated incidence in hot climates and frequent short-trip usage. Porsche internal field data from 2020 indicated a notable rate of HPFP-related repairs before 70,000 km in affected batches, while UK DVSA records show minimal emissions-related failures thanks to robust GPF and catalyst integration. Thermal stress and fuel quality make adherence to OEM oil and petrol specifications critical.
Analysis derived from Porsche technical bulletins (2016–2020) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PORSCHE MCU-DB.
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