The Citroen BlueHDi 100 is a 1,499 cc, inline-four turbo-diesel engine produced between 2018 and 2023. Part of the Stellantis EB family, it delivers efficient performance for compact and mid-size vehicles. Equipped with a dual overhead camshaft (DOHC), high-pressure common-rail injection, and a variable geometry turbocharger, it produces 70 kW (95 PS) with 250 Nm of torque, offering strong low-end pull ideal for urban driving and motorway cruising.
Fitted primarily to the Citroën C3, C4, and DS 3 Crossback, the BlueHDi 100 was engineered for fuel efficiency, low emissions, and smooth drivability. Emissions control meets Euro 6d standards via a diesel particulate filter (DPF), exhaust gas recirculation (EGR), selective catalytic reduction (SCR) with AdBlue injection, and closed-loop lambda feedback, ensuring compliance across European markets. Its compact design and lightweight construction support modern electrified platforms.
One documented concern is premature high-pressure fuel pump (HPFP) wear observed in certain 2018–2020 production units, highlighted in Stellantis Technical Bulletin TGB014. This issue is attributed to fuel contamination and inadequate filtration in early fuel system designs. From 2021 onward, an upgraded Bosch CP4 HPFP with revised fuel filter housing and water-in-fuel sensor was implemented to improve reliability.
Production years 2018–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/9890).
The Citroen BlueHDi 100 is a 1,499 cc inline-four turbo-diesel engine engineered for compact and family vehicles (2018–2023). It combines DOHC 16-valve architecture with common-rail direct injection and a variable geometry turbocharger to deliver responsive low-RPM torque and strong fuel economy. Designed to meet Euro 6d emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,499 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 79.0 mm × 97.0 mm | |
| Power output | 70 kW (95 PS) @ 3,750 rpm | |
| Torque | 250 Nm @ 1,750–2,500 rpm | |
| Fuel system | Bosch CP4 common-rail (up to 2,200 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 15.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single variable-geometry turbo (Honeywell GT17) | |
| Timing system | Timing belt (interval: 100,000 km or 5 years) | |
| Oil type | SAE 5W-30, ACEA C2/C3 | |
| Dry weight | 135 kg |
The turbocharged DOHC design provides strong low-RPM torque ideal for city driving and load carrying, but demands strict timing belt maintenance to prevent engine damage. SAE 5W-30 ACEA C2/C3 oil is recommended to ensure proper lubrication under varied loads. Cold-start idling should be minimized to reduce wear during warm-up. The Bosch CP4 fuel system requires ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent high-pressure pump seizure. Post-2021 models feature upgraded fuel filtration; pre-2021 engines should be inspected for fuel pump wear per Stellantis TGB014. The SCR/AdBlue system requires regular top-ups and active regeneration cycles to maintain emissions compliance.
Oil Specs: Requires ACEA C2/C3 specification (Stellantis SIB TGB014). BMW Longlife or VW 502 00 not compatible.
Emissions: Euro 6d certification applies to all BlueHDi 100 models (2018–2023) (VCA Type Approval #VCA/EMS/9890).
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel qualities meeting EN 590 (PSA TIS EB2012).
PSA Technical Information System (TIS): Docs EB2001, EB2002, EB2012, TGB014
VCA Type Approval Database (VCA/EMS/9890)
ISO 1585:1996 Road vehicles — Engine test code — Net power
The Citroen BlueHDi 100 was used across Citroen's C3 and C4 platforms with transverse mounting and shared with DS under Stellantis platform commonality. This engine received model-specific tuning-for smoother throttle response in the C4-and from 2021 the updated Bosch CP4 fuel pump with improved filtration, creating interchange limits. Partnerships within the Stellantis Group allowed DS's 3 Crossback to use identical powertrain calibration. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right-side of the cylinder block near the exhaust manifold (PSA TIS EB2005). The 8th VIN digit indicates engine type ('E' for BlueHDi 100 series). Pre-2021 models have a silver cam cover with black intake manifold; post-2021 units use black cam covers. Critical differentiation from BlueHDi 130: BlueHDi 100 has Bosch EDC17CP55 ECU with rectangular diagnostic connector, while BlueHDi 130 uses EDC17CP66 with trapezoidal port. Service parts require production date verification - fuel pumps for engines before 06/2021 are incompatible with later revised units (Stellantis SIB TGB014).
The BlueHDi 100's primary reliability risk is high-pressure fuel pump failure on early builds, with elevated incidence in high-mileage vehicles. Stellantis internal reports from 2021 noted a significant number of pre-2021 engines requiring HPFP replacement before 120,000 km, while UK DVSA MOT records show SCR-related failures linked to urban driving. Extended stop-start cycles and poor fuel quality increase failure risk, making adherence to maintenance schedules critical.
Analysis derived from Stellantis technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN BLUEHDI100.
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