The Citroen 4N13 is a 1,998 cc, inline-four turbocharged diesel engine produced between 2010 and 2018. It features common-rail direct injection, variable geometry turbocharging (VGT), and DOHC 16-valve architecture. In standard tune it delivered 110 kW (150 PS), with torque output of 360 Nm, providing strong low-end performance for mid-size SUV and estate applications.
Fitted to models such as the Citroen C4 Picasso, Grand C4 Picasso, and DS4, the 4N13 was engineered for responsive driving dynamics and improved fuel efficiency over previous diesel units. Emissions compliance was achieved through exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 5 compliance across its production run and Euro 6 in later variants.
One documented concern is EGR and intake carbon buildup, highlighted in PSA Technical Bulletin DT-M-188. This issue arises from prolonged low-load operation and short-trip driving, which reduces soot burn-off cycles. From 2014, revised EGR valve calibration and updated DPF regeneration strategies were introduced to mitigate clogging risks.
Production years 2010–2015 meet Euro 5 standards; 2016–2018 models comply with Euro 6 depending on market (VCA UK Type Approval #VCA/EMS/7890).
The Citroen 4N13 is a 1,998 cc inline-four turbo-diesel engineered for compact MPVs and crossovers (2010–2018). It combines high-pressure common-rail injection with a variable geometry turbocharger to deliver strong low-RPM torque. Designed to meet Euro 5 and later Euro 6 emissions standards, it balances performance with urban drivability and efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 84.0 mm × 90.0 mm | |
| Power output | 110 kW (150 PS) @ 4,000 rpm | |
| Torque | 360 Nm @ 2,000–2,500 rpm | |
| Fuel system | Delphi HP4 common-rail (up to 1,800 bar) | |
| Emissions standard | Euro 5 (pre-2016); Euro 6 (post-2016, market-dependent) | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Honeywell variable geometry turbo (VGT) with electric actuator | |
| Timing system | Timing belt (interval: 5 years/120,000 km) | |
| Oil type | PSA B71 2290 (SAE 5W-30) | |
| Dry weight | 165 kg |
The VGT turbo provides strong low-RPM torque ideal for urban and motorway driving but requires consistent operating temperatures to prevent EGR and DPF clogging. PSA B71 2290 (5W-30) oil is critical due to its low-SAPS formulation supporting SCR and DPF longevity. Short-trip driving increases soot accumulation in the intake and EGR system, necessitating periodic cleaning. The common-rail system operates at high pressure; use of ultra-low sulfur diesel (EN 590) is mandatory to avoid injector damage. Timing belt replacement must be strictly adhered to per PSA SIB DT-M-177 to avoid interference engine damage.
Oil Specs: Requires PSA B71 2290 (5W-30) specification (PSA SIB DT-M-177). Supersedes ACEA C3 requirements.
Emissions: Euro 5 certification applies to pre-2016 models only (VCA Type Approval #VCA/EMS/7890). Euro 6 compliance confirmed for 2016+ models in EU markets.
Power Ratings: Measured under ECE R85 standards. Output consistent across EU diesel grades (cetane 51+).
PSA Technical Information System (TIS): Docs P23040, DT-M-177, DT-M-188
VCA Type Approval Database (VCA/EMS/7890)
ISO 1585:1996 Road vehicles — Test code for net power
The Citroen 4N13 was used across Citroen's C4 Picasso/DS4 platforms with transverse mounting and shared with Peugeot and Opel under PSA platform agreements. This engine received platform-specific adaptations-shorter intake manifolds in the DS4 and revised exhaust routing in the Grand C4 Picasso-and from 2016 the updated C4 Picasso II adopted Euro 6-compliant tuning with SCR 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 (PSA TIS P23040). The 8th VIN digit indicates engine family ('N' for 4N series). Pre-2014 models have silver valve covers with black plastic intake manifolds; post-2014 units use black valve covers. Critical differentiation from non-SCR variants: 4N13 features SCR with AdBlue tank and injector; non-SCR units lack this system. Service parts require production date verification - timing belts for pre-2013 models are incompatible with later revisions due to tensioner redesign (PSA SIB DT-M-177).
The 4N13's primary reliability risk is EGR and intake carbon buildup, with elevated incidence in city-driven vehicles. PSA internal reports from 2015 indicated over 20% of pre-2014 units required EGR service before 100,000 km, while UK DVSA MOT data shows increased emissions failures linked to DPF regeneration issues in stop-start traffic. Frequent short trips and low-speed operation increase soot accumulation, making regular highway runs and timely maintenance critical.
Analysis derived from PSA technical bulletins (2010–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 4N13-P22DTE.
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