Vehicle Segment:
Compact family car / hatchback
Competitors:
Ford Focus, Volkswagen Golf, Opel Astra, Renault Mégane, Peugeot 307
Design Philosophy:
Citroën's distinctive styling, comfort-oriented ride, innovative features (e.g., advanced suspension options on higher trims)
Manual Purpose:
To provide comprehensive technical guidance for service, maintenance, and repair of the Citroën C4 1.6i 16V 2005, catering to both DIY enthusiasts and professional mechanics.
Manual Advantage:
Offers factory-level detail and accuracy, ensuring correct procedures and specifications are followed, unlike generic online guides.
Engine Mechanical:
Complete overhaul, diagnostics, timing, seals, gaskets, pistons, crankshaft, camshafts
Fuel System:
Fuel pump, injectors, fuel filter, throttle body, fuel pressure regulation
Cooling System:
Radiator, water pump, thermostat, hoses, coolant specifications, fan operation
Lubrication System:
Oil pump, oil filter, oil specifications, oil cooler (if applicable)
Exhaust System:
Manifold, catalytic converter, muffler, lambda sensors (oxygen sensors)
Ignition System:
Spark plugs, ignition coils, crankshaft position sensor, camshaft position sensor
Electrical System:
Battery, alternator, starter motor, lighting, interior electronics, fuses, relays
Chassis And Suspension:
Front and rear suspension components, steering system, wheel bearings, shock absorbers
Brakes:
Brake pads, discs, calipers, ABS system, brake fluid specifications
Bodywork And Exterior:
Body panels, doors, hood, trunk, bumpers, glass, mirrors
Interior And Trim:
Seats, dashboard, door panels, trim pieces, airbags
Emission Control:
Catalytic converter operation, EGR system (if applicable), EVAP system, emission control components
Wiring Diagrams:
Comprehensive electrical schematics for all vehicle systems
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-ups, spark plug replacement
Diagnostics And Troubleshooting:
Step-by-step troubleshooting guides for common and complex issues, diagnostic trouble codes (DTCs)
Component Removal And Installation:
Detailed instructions for removing and refitting all major and minor components
Rebuilding Procedures:
Full engine and transmission rebuild procedures with specifications
Torque Specifications:
Precise torque values for all critical fasteners
Depth Of Information:
Covers all aspects from basic maintenance to complete mechanical and electrical system overhauls and diagnostics.
Engine Code:
EC5 (TU5JP4 derivative)
Engine Type:
Inline 4-cylinder, naturally aspirated petrol
Bore X Stroke:
78.5 mm x 82.0 mm
Compression Ratio:
10.2:1
Horsepower:
110 PS (108 bhp; 81 kW) at 6000 rpm
Torque:
147 Nm (108 lb-ft) at 4000 rpm
Fuel Delivery:
Multi-point fuel injection (MPFI)
Fuel Type:
Unleaded Petrol (95 RON recommended)
ECU Type:
Bosch Motronic or Siemens Sagem (specific to market/variant)
Euro Ncap Rating:
5 Stars (overall)
Child Occupant Protection:
4 Stars
Pedestrian Protection:
2 Stars
ABS:
Standard, with Electronic Brake-force Distribution (EBD) and Emergency Brake Assist (EBA)
Esp Asr:
Optional (Electronic Stability Program and Traction Control)
Airbags:
Front, side, and curtain airbags standard on most trims
Seatbelts:
Three-point seatbelts with pretensioners and force limiters
Head Unit:
Factory fitted radio/CD player with manual controls, optional steering wheel audio controls.
Display:
Central digital display for audio, climate, and vehicle information.
Cruise Control:
Optional, often integrated with speed limiter.
Parking Sensors:
Optional rear parking sensors.
Bluetooth:
Optional, for hands-free calling and audio streaming (depending on trim level and factory fitment).
Climate Control:
Manual air conditioning or optional dual-zone automatic climate control.
Oil Change Interval:
Every 20,000 km (12,500 miles) or 2 years, whichever comes first (using correct oil specification).
Air Filter Replacement:
Every 40,000 km (25,000 miles) or 2 years.
Spark Plug Replacement:
Every 60,000 km (37,500 miles) or 4 years (using specific iridium or platinum plugs).
Brake Fluid Change:
Every 2 years, regardless of mileage.
Engine Oil Type:
Fully Synthetic SAE 5W-30 meeting PSA B71 2290 specification (or equivalent like ACEA C2).
Coolant Type:
Antifreeze/coolant meeting PSA S71 2710 specification (typically a long-life, organic acid technology - OAT - type).
Transmission Fluid Manual:
API GL-4 SAE 75W-80 synthetic gear oil.
Transmission Fluid Automatic:
ATF LT 71141 (or equivalent).
Coil On Plug Failures:
Intermittent misfires, rough idling, check engine light due to failing ignition coils.
Temperature Sensor Issues:
Engine coolant temperature sensor (ECT) can fail, leading to incorrect fuel mixture and poor running.
Throttle Body Issues:
Electronic throttle body can accumulate carbon deposits or fail, causing idling problems or limp-home mode.
Exhaust Manifold Cracks:
Cracks can develop in the exhaust manifold, leading to exhaust leaks and ticking noises.
Automatic Transmission Faults:
The AL4 automatic transmission is known for potential issues with its hydraulic block and solenoid valves, requiring specific diagnostic procedures and fluid changes.
Citroen Philosophy:
Known for innovation, comfort, and distinctive design (e.g., hydropneumatic suspension pioneered in earlier models).
C4 Introduction:
Launched in 2004 as a successor to the Citroën Xsara, aiming to blend stylish design with practicality and advanced technology.
First Generation:
The 2005 model year represents the early part of the first generation of the C4.
Assembly Locations:
Mainly assembled in France (Mulhouse) and Spain (Villaverde, Madrid).