Segment:
        
        
            City Car / Subcompact Hatchback
        
     
    
        
            Target Audience:
        
        
            Budget-conscious urban drivers, first-time car buyers, and small families seeking economical transportation.
        
     
    
    
        
            Primary Competitors:
        
        
            Toyota Aygo, Peugeot 107, Fiat 500, Volkswagen up!, Hyundai i10, Kia Picanto.
        
     
    
    
        
            Design Philosophy:
        
        
            Compact, agile, fuel-efficient, and affordable urban mobility with a distinctive French design flair.
        
     
    
        
            Platform Sharing:
        
        
            Developed in collaboration with Toyota (Aygo) and Peugeot (107), sharing a common platform and key components.
        
     
 
    
    
    
        
            Engine Mechanics:
        
        
            Engine overhaul, cylinder head, pistons, crankshaft, lubrication system, cooling system, timing belt/chain, emissions control systems.
        
     
    
        
            Fuel System:
        
        
            Fuel tank, fuel pump, fuel injectors, fuel pressure regulator, emission control systems (EVAP).
        
     
    
        
            Ignition System:
        
        
            Spark plugs, ignition coils, engine control unit (ECU) ignition timing.
        
     
    
        
            Transmission Manual:
        
        
            Clutch assembly, gearbox internal components, shifting mechanisms, gear ratios, maintenance, and repair.
        
     
    
        
            Transmission Automated Manual:
        
        
            Operation of the electronic clutch actuator, gear selection actuator, hydraulic system, troubleshooting.
        
     
    
        
            Braking System:
        
        
            Front and rear brake systems (discs/drums), hydraulic lines, ABS (Anti-lock Braking System) components, parking brake.
        
     
    
        
            Suspension System:
        
        
            Front and rear suspension components, shock absorbers, springs, control arms, wheel alignment procedures.
        
     
    
        
            Steering System:
        
        
            Steering rack, power steering system (if applicable, though typically electric on C1), steering column, tie rods.
        
     
    
        
            Electrical System:
        
        
            Battery, alternator, starter motor, lighting systems, fuses, relays, wiring diagrams, body control module (BCM).
        
     
    
        
            Climate Control:
        
        
            Air conditioning system (refrigerant, compressor, condenser, evaporator), heater system, cabin filters.
        
     
    
        
            Bodywork:
        
        
            Exterior panels, doors, hood, trunk, bumpers, interior trim, glass replacement, rust prevention.
        
     
    
    
        
            Scheduled Maintenance:
        
        
            Detailed schedules for oil changes, filter replacements, spark plugs, brake fluid, coolant, and inspections.
        
     
    
        
            Engine Repair:
        
        
            Complete engine disassembly, inspection, and reassembly procedures, including torque specifications for critical fasteners.
        
     
    
        
            Transmission Repair:
        
        
            Clutch replacement, gearbox component replacement, seal and gasket replacement.
        
     
    
        
            Brake System Service:
        
        
            Brake pad and disc/drum replacement, brake fluid bleeding, caliper servicing.
        
     
    
        
            Suspension And Steering Repair:
        
        
            Replacement of ball joints, tie rod ends, shock absorbers, springs, steering rack repair.
        
     
    
        
            Electrical Diagnostics:
        
        
            Troubleshooting common electrical faults using wiring diagrams, component testing procedures.
        
     
    
        
            Air Conditioning Service:
        
        
            Refrigerant charging, leak detection, compressor replacement.
        
     
    
        
            Troubleshooting Guides:
        
        
            Systematic diagnostic procedures for common symptoms and fault codes.
        
     
    
        
            Body Panel Replacement:
        
        
            Procedures for removing and installing exterior body panels, aligning doors, and replacing glass.
        
     
    
    
        
            Depth:
        
        
            In-depth, suitable for professional mechanics and advanced DIY enthusiasts. Includes detailed diagrams, specifications, and troubleshooting trees.
        
     
 
    
    
    
        
            Engine Code:
        
        
            1KR-FE (Toyota-derived)
        
     
    
        
            Engine Type:
        
        
            3-cylinder, naturally aspirated petrol
        
     
    
        
            Displacement:
        
        
            998 cc (1.0 Litre)
        
     
    
    
        
            Bore X Stroke:
        
        
            71 mm x 83.8 mm
        
     
    
        
            Compression Ratio:
        
        
            10.5:1
        
     
    
        
            Horsepower:
        
        
            68 PS (50 kW) @ 6,000 rpm
        
     
    
        
            Torque:
        
        
            93 Nm (69 lb-ft) @ 3,600 rpm
        
     
    
    
        
            Fuel Delivery:
        
        
            Multi-point Fuel Injection (MPI)
        
     
    
        
            Fuel Type:
        
        
            Unleaded Petrol (95 RON recommended)
        
     
    
    
        
            ECU Type:
        
        
            Denso ECU (e.g., 89661-YYxxx series)
        
     
    
    
        
            Oil Capacity:
        
        
            3.1 litres (with filter change)
        
     
    
        
            Recommended Oil Grade:
        
        
            SAE 0W-20 or 5W-30 (API SN/CF, ACEA A1/B1 or A5/B5 compliant)
        
     
    
    
        
            Coolant Capacity:
        
        
            Approx. 4.0 litres
        
     
    
        
            Coolant Type:
        
        
            Ethylene glycol-based antifreeze with corrosion inhibitors (long-life, pink/purple)
        
     
 
    
    
    
        
            Euroncap Rating:
        
        
            4 Stars (scored 28 points out of 37 for adult occupant protection, 3 stars for child occupant protection, 1 star for pedestrian protection in original tests).
        
     
    
    
        
            ABS:
        
        
            Standard on all models (Anti-lock Braking System).
        
     
    
        
            Esp:
        
        
            Optional or standard on higher trims depending on market (Electronic Stability Program).
        
     
    
        
            Ebs:
        
        
            Emergency Brake Assist (EBA).
        
     
    
    
        
            Airbags Front:
        
        
            Driver and front passenger airbags standard.
        
     
    
        
            Airbags Side:
        
        
            Optional front side airbags.
        
     
    
        
            Seatbelts:
        
        
            3-point seatbelts with pretensioners and load limiters (front), 2-point rear lap belt (centre rear), 3-point belts (outer rear).
        
     
    
        
            Child Seat Anchors:
        
        
            ISOFIX mounting points for rear seats.
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            15,000 km (9,300 miles) or 1 year, whichever comes first.
        
     
    
        
            Air Filter Replacement:
        
        
            Every 30,000 km (18,600 miles) or 2 years.
        
     
    
        
            Pollen Filter Replacement:
        
        
            Every 30,000 km (18,600 miles) or 1 year.
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 60,000 km (37,300 miles) or 4 years (NGK Iridium recommended).
        
     
    
        
            Brake Fluid Change:
        
        
            Every 2 years, regardless of mileage.
        
     
    
        
            Coolant Change:
        
        
            Every 5 years or 100,000 km (62,000 miles) (long-life coolant).
        
     
    
        
            Timing Belt Replacement:
        
        
            Every 100,000 km (62,000 miles) or 6 years (whichever comes first). Includes idler pulleys and tensioner.
        
     
    
    
        
            Engine Oil Specification:
        
        
            Refer to 'engine_specs' section; typically SAE 0W-20 or 5W-30 API SN/ACEA A5/B5.
        
     
    
        
            Brake Fluid Specification:
        
        
            DOT 4
        
     
    
        
            Coolant Specification:
        
        
            Refer to 'engine_specs' section; typically long-life pink/purple ethylene glycol.
        
     
    
        
            Power Steering Fluid:
        
        
            Electric Power Steering (EPS) - no fluid to change, but specific diagnostic procedures apply.
        
     
    
    
        
            Clutch Wear:
        
        
            Premature clutch wear, especially in urban stop-and-go traffic and with the automated manual transmission (2-Tronic).
        
     
    
        
            Engine Performance:
        
        
            Underpowered feel on motorways or inclines, occasional rough idle if ignition or fuel system components are faulty.
        
     
    
        
            Exhaust Manifold:
        
        
            Cracking of the exhaust manifold on the 1KR-FE engine is a known issue, especially on earlier models, though less prevalent on facelifted versions.
        
     
    
        
            Electric Power Steering:
        
        
            Intermittent or complete failure of the EPS system, often indicated by warning lights and heavy steering.
        
     
    
        
            Rear Wheel Bearings:
        
        
            Premature wear of rear wheel bearings, leading to rumbling noises.
        
     
    
        
            Body Rust:
        
        
            Potential for rust on sills, wheel arches, and underbody components, especially in regions with salted roads.
        
     
 
    
    
    
        
            Citroen Brand:
        
        
            Citroën, a French manufacturer known for innovative and often quirky designs, positioned as a value-oriented brand within the PSA Peugeot Citroën group (now Stellantis).
        
     
    
    
        
            C1 Introduction:
        
        
            First generation C1 launched in 2005 as part of the Project B collaboration with Toyota and Peugeot, replacing the Citroën Saxo.
        
     
    
        
            Facelift:
        
        
            The 2014 model represents the facelift version of the first-generation C1, introducing updated styling, minor interior revisions, and potentially improved efficiency or features.
        
     
    
    
        
            Manufacturing Location:
        
        
            Kolín, Czech Republic (jointly with Toyota Peugeot Citroën Automobile Czech s.r.o. - TPCA).
        
     
    
        
            Production Years:
        
        
            First generation C1: 2005-2014. This manual covers the 2014 model year within this generation.