The Citroën CFB (1KR) is a 998 cc, inline — three petrol engine produced between 2010 and 2016. It belongs to the Toyota 1KR — FE engine family, co — developed under the Toyota — PSA partnership for compact urban vehicles. Featuring DOHC 12 — valve configuration and multi — point fuel injection, it delivers 50 kW (68 PS) at 6,000 rpm and 95 Nm of torque at 3,600 rpm, optimized for lightweight city driving and fuel efficiency.
Fitted exclusively to the Citroën C1 and its platform sib…
Production years 2010–2016 meet Euro 5 standards .
The Citroën CFB (1KR) is a 998 cc inline-three petrol engine developed for ultra-compact city cars (2010–2016). It features a DOHC 12-valve layout with multi-point fuel injection, delivering modest power and high fuel efficiency. Designed to meet Euro 5 emissions standards, it supports lightweight urban mobility with low maintenance demands and compact packaging.
| Parameter | Value | Source |
|---|---|---|
Displacement | 998 cc | |
Fuel type | Petrol | |
Configuration | Inline-3, DOHC, 12-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 71.0 mm × 84.0 mm | |
Power output | 50 kW (68 PS) @ 6,000 rpm | |
Torque | 95 Nm @ 3,600 rpm | |
Fuel system | Denso MPI (multi-point injection) | |
Emissions standard | Euro 5 | |
Compression ratio | 11.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Timing chain (lifetime service interval, inspection recommended at 120,000 km) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 87 kg |
The Citroën CFB (1KR) was used exclusively in the Citroën C1 platform with transverse mounting and shared under the Toyota-PSA joint venture for badge-engineered applications. This engine received no major adaptations across brands, maintaining identical calibration and emissions systems. From 2012, the revised timing chain tensioner improved reliability, creating a service part distinction. All units are documented in OEM technical bulletins.
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The CFB (1KR)'s primary reliability risk is timing chain tensioner failure on early builds, with elevated incidence in urban stop-start driving. PSA internal reports from 2013 indicated a notable number of pre-2012 engines required tensioner replacement before 100,000 km, while VCA records show neglected inspections as a leading cause of chain-related engine noise. Short-trip usage and delayed maintenance amplify wear, making oil quality and inspection adherence critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The CFB (1KR) is generally reliable for city use but early models (2010–2011) are prone to timing chain tensioner issues. Later revisions (post-2012) with updated components are more durable. When maintained properly—with regular oil changes and tensioner inspection at 120,000 km—it can be reliable beyond 150,000 km. Avoid short trips and ensure cooling system integrity to maximize longevity.
Key issues include timing chain tensioner wear (especially pre-2012), throttle body carbon buildup, coolant leaks from the water pump, and ignition coil failure. These are documented in PSA service bulletins. Regular inspection of the chain system, use of quality coolant, and cleaning the throttle body can prevent major failures.
The CFB (1KR) was used exclusively in the Citroën C1 1.0 VTI (2010–2016). It was also shared with Peugeot in the 107 and Toyota in the Aygo under the joint venture agreement. All applications are Euro 5 compliant and feature the 50 kW (68 PS) output. The engine was phased out in 2016 with the introduction of the 1KR-DE variant with stop-start technology.
Aftermarket ECU tuning is common on the CFB-1KR platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In the Citroën C1, the CFB (1KR) averages 4.8–5.5 L/100km (59–51 mpg UK) in mixed driving. Highway consumption can reach 4.2 L/100km (67 mpg UK), while city driving may rise to 6.0 L/100km (47 mpg UK). Fuel quality is important—use 95 RON for optimal efficiency. Real-world economy benefits from light weight and low rolling resistance, making it one of the most economical petrol engines in its class.
Yes. The CFB (1KR) is an interference engine. If the timing chain fails or jumps, the pistons can contact the open valves, causing catastrophic damage. While the chain is designed for the life of the engine, pre-2012 tensioner issues make inspection at 120,000 km critical. Any rattling noise from the front cover requires immediate inspection to prevent engine seizure.
PSA specifies SAE 5W-30 oil meeting ACEA A1/B1 standards. Use high-quality mineral or semi-synthetic oil and change every 15,000 km or annually. For pre-2012 engines, more frequent changes (10,000 km) are advised to protect the timing tensioner. Always check for coolant contamination and maintain proper oil level to ensure consistent oil pressure at idle.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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