Segment:
Executive/Luxury Sedan
Uniqueness:
Pioneering hydropneumatic suspension system, aerodynamic design, front-wheel drive layout
Competitors 1991:
Mercedes-Benz W124 E-Class, BMW E34 5 Series, Audi V8 Quattro, Peugeot 605
Design Philosophy:
Aerodynamic 'jet-age' styling, comfort-oriented ride quality, innovative engineering
Driver Experience:
Exceptional ride comfort and road holding due to hydropneumatic suspension, intuitive controls
Covered Models:
Citroën CX (all variants, including Prestige, GTi, TRD, etc.) for the 1991 model year
Estimated Pages:
Approximately 800-1200 pages (typical for comprehensive service manuals of this era)
Type:
Factory Service Manual / Workshop Manual
Language:
English (translated from original French)
Powertrain:
Engine mechanical, fuel system, ignition system, exhaust system, cooling system
Drivetrain:
Transmission (manual and automatic), clutch, drive shafts, differentials
Chassis:
Suspension (hydropneumatic systems), steering, brakes (hydraulic, ABS), wheels, tires
Electrical:
Wiring diagrams, lighting system, starting and charging system, ignition system, instrumentation, power accessories, body electronics
Body:
Body construction, interior trim, exterior trim, glass, doors, hoods, latches
Maintenance:
Scheduled maintenance intervals, fluid checks and changes, filter replacements, lubrication points
Diagnostics:
Troubleshooting guides, fault code interpretation (where applicable), diagnostic charts, component testing procedures
Repair:
Step-by-step repair procedures for all major components and systems, including engine rebuilds, transmission overhauls, suspension component replacement, brake caliper rebuilds
Overhaul:
Detailed instructions for the disassembly, inspection, and reassembly of engine, transmission, and suspension components
Adjustment:
Calibration and adjustment procedures for systems like ignition timing, carburetor settings (if applicable), suspension height
Depth:
Comprehensive coverage for professional technicians, including detailed diagrams, torque specifications, tolerances, and diagnostic procedures
Diagnostic Level:
Advanced diagnostics, including electrical system troubleshooting and hydraulic system analysis
Engine Code:
Douvrin (PRV V6) - various displacements available for 1991
Displacement 1:
2.0 Liters (e.g., CX 20) - 1995cc
Displacement 2:
2.2 Liters (e.g., CX 22) - 2165cc
Displacement 3:
2.5 Liters (e.g., CX 25, GTi) - 2494cc
Horsepower 2.0L:
Approx. 110-115 hp (net)
Horsepower 2.2L:
Approx. 115-120 hp (net)
Horsepower 2.5L:
Approx. 130-138 hp (net)
Horsepower 2.5L Gti:
Approx. 160-168 hp (net, fuel injected)
Induction 2.0L:
Carburetor (e.g., Weber or Solex twin-choke)
Induction 2.2L:
Carburetor (e.g., Solex twin-choke)
Induction 2.5L:
Carburetor (e.g., Solex twin-choke) or Bosch L-Jetronic Fuel Injection (GTi variant)
Fuel Type:
Unleaded Gasoline (95-98 RON recommended)
Transmission Type Std:
4-speed Manual Transmission (e.g., UNC 5-speed available on some models)
Transmission Type Opt:
3-speed or 4-speed ZF Automatic Transmission
Clutch Type:
Hydraulic clutch actuation
Transaxle:
Front-wheel drive transaxle design
Crash Test Availability:
Limited contemporary crash test data available from independent agencies
Braking System:
Hydraulic, servo-assisted with front discs and rear drums. ABS available on higher trims/later models.
Suspension Stability:
Hydropneumatic self-leveling suspension contributes to stability
Seat Belts:
Three-point seat belts (front and rear)
Body Structure:
Reinforced safety cage, crumple zones
Audio System:
Factory fitted radio/cassette player, often with amplifier
ABS:
Anti-lock Braking System (optional on some models)
Power Steering:
Hydraulic power steering, often with variable assist
Original Features:
Central locking, electric windows, air conditioning (optional)
Oil Change:
Every 7,500-10,000 km or 12 months
Air Filter:
Every 15,000-20,000 km
Spark Plugs:
Every 20,000-30,000 km (depending on type)
Timing Belt:
Crucial: Replace every 60,000-80,000 km or 4-5 years (non-interference engine on some variants, but critical for reliability)
Engine Oil:
10W-40 or 15W-50 (API SF/SG) - check manual for specific viscosity and API rating
Transmission Fluid Manual:
GL-4 75W-90 or 80W-90 Gear Oil
Transmission Fluid Auto:
Dexron II (or equivalent)
Hydropneumatic Fluid:
LHM (Citroën Hydraulic Fluid - Green color)
Hydropneumatic System:
Leaking spheres, failing hydraulic pump, worn seals, height corrector issues
Electrical System:
Corrosion in connectors, failing dashboard components, wiring harness degradation
Rust:
Prone to rust in wheel arches, sills, and floor pans, especially in damp climates
Engine Cooling:
Overheating due to compromised radiator or fan operation
Exhaust System:
Corrosion and leaks, particularly on longer tailpipes of larger engines
Citroen Innovation:
Renowned for automotive innovation, particularly in suspension and aerodynamics (DS, SM)
Cx Development:
Successor to the iconic Citroën DS, retaining hydropneumatic suspension and front-wheel drive, launched in 1974
Series 2 Update:
Significant facelift in 1986 (Series 2) with revised interior, improved aerodynamics, and updated powertrain options
Production Period:
1974-1991
Production Volume:
Over 300,000 units produced globally
