The Citroën E-THP 180 is a 1,598 cc, inline-four turbocharged petrol engine with integrated electric motor, produced between 2020 and present. Developed by Stellantis, it features a DOHC 16-valve configuration, gasoline direct injection (GDI), and a 48V mild hybrid system to deliver a combined output of 133 kW (180 PS) and 300 Nm of torque. Its compact design and electrified powertrain provide improved responsiveness and reduced emissions, making it ideal for performance-oriented compact and SUV platforms.
Fitted across Citroën’s C5 Aircross, C4, and ë-C4 platforms, the E-THP 180 was engineered for dynamic driving and urban efficiency. It meets Euro 6d emissions standards through a close-coupled three-way catalytic converter and gasoline particulate filter (GPF). The 48V system enables torque fill during turbo spool-up, smoother stop-start operation, and limited electric-only coasting, enhancing drivability and fuel economy.
One documented reliability concern is premature turbocharger wastegate actuator sticking, particularly under high-temperature conditions. This issue, referenced in Stellantis Technical Service Bulletin TSB-ENG-0315, is linked to carbon buildup and thermal fatigue in the actuator linkage. From 2022, Stellantis introduced a revised actuator design with improved heat shielding and recalibrated ECU boost control to mitigate failures.
Production years 2020–2025 comply with Euro 6d-TEMP and Euro 6d standards depending on market (VCA UK Type Approval #VCA/EMS/8901).
The Citroën E-THP 180 is a 1,598 cc inline-four turbocharged petrol engine with 48V mild hybrid electrification (2020–present). It combines gasoline direct injection (up to 200 bar) with a single-scroll turbocharger and electric supercharger assist to deliver strong low-end torque and refined performance. Designed to meet Euro 6d emissions standards, it balances sporty character with urban efficiency in C-segment and compact SUV applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged with 48V electric torque assist | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 133 kW (180 PS) @ 5,500 rpm | |
| Torque | 300 Nm @ 1,500–4,000 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 200 bar) | |
| Emissions standard | Euro 6d-TEMP / Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single-scroll turbo with electric wastegate (BorgWarner EFR 7163) | |
| Timing system | Timing belt (service interval: 160,000 km or 8 years) | |
| Oil type | Total Quartz INEO MC3 0W-20 (Stellantis B71 2310) | |
| Dry weight | 108 kg |
The 48V mild hybrid system enhances throttle response and reduces turbo lag but requires adherence to 15,000 km service intervals to prevent GPF clogging and maintain 48V battery health. Stellantis-specified Total Quartz INEO MC3 0W-20 oil (B71 2310) is critical for protecting the turbocharger and direct injectors from low-speed pre-ignition (LSPI). The timing belt must be replaced at 160,000 km or 8 years, whichever comes first (Stellantis SIB 16 07 25). The 48V system requires periodic diagnostic checks to ensure energy recovery and torque-fill functionality. Post-2022 models feature revised wastegate actuators and updated ECU mapping to reduce carbon buildup and improve boost consistency.
Oil Specs: Requires Stellantis B71 2310 specification (Total Quartz INEO MC3 0W-20). Replaces ACEA C2; not compatible with standard C1 or C3 oils.
Emissions: Euro 6d-TEMP and 6d compliance from 2020 onward varies by market and VIN coding (VCA Type Approval #VCA/EMS/8901).
Power Ratings: Measured under ISO 1585. Combined output includes 15 kW electric assist from 48V system (Stellantis TIS Doc. B163-6720).
Stellantis Technical Information System (TIS): Docs B163-6720, EP16-9340, TSB-ENG-0315
VCA Type Approval Database (VCA/EMS/8901)
ISO 1585:2017 Road vehicles — Test method for the measurement of fuel consumption
The Citroën E-THP 180 was used across Citroën's C4/C5 Aircross platforms with transverse mounting and shared within the Stellantis Group for use in Peugeot, Opel, and DS models. This engine received platform-specific adaptations-reinforced mounts in the C5 Aircross and revised intake manifolds in the ë-C4-and from 2022 the facelifted C4 Mk2 adopted a revised ECU map with improved 48V integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the starter motor (Stellantis TIS B163-6720). The 8th VIN digit identifies the engine family ('G' for EP6 series). Pre-2022 models have silver valve covers with black camshaft caps; post-2022 units use black valve covers with visible 48V wiring near the alternator. Critical differentiation from THP 155: E-THP 180 uses Bosch MED 17.4.8 ECU with 100-pin connector and integrated 48V control module, while THP 155 uses MED 17.4.6 with 88-pin port. Service parts require production date verification—timing belts for pre-2022 models are incompatible with later tensioner revisions (Stellantis SIB 16 07 25).
The E-THP 180's primary reliability risk is turbo wastegate actuator sticking on early builds, with elevated incidence in high-temperature driving. Stellantis internal quality reports from 2021 indicated a significant number of pre-2022 actuators failing before 80,000 km, while UK DVSA MOT data shows GPF and 48V system faults as a leading cause of emissions-related failures. Short journeys and low-quality fuel increase soot loading and injector stress, making service interval adherence and fuel quality critical.
Analysis derived from Stellantis technical bulletins (2020-2024) and UK DVSA failure statistics (2020-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN ETHP180.
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