Market Position:
The Citroën BX was positioned as a distinctive and technologically advanced hatchback in the European market, known for its unique hydropneumatic suspension and aerodynamic design.
Competitors:
Competed against models like the Volkswagen Golf, Ford Escort, Peugeot 305/405, and Renault 11/19, differentiating itself with its advanced suspension and Citroën's signature comfort.
Key Features:
Hydropneumatic self-levelling suspension, advanced aerodynamics, spacious and futuristic interior, distinctive styling, available in various engine configurations.
Value Proposition:
Empowers BX owners and independent mechanics with the knowledge and procedures to perform comprehensive maintenance and repairs, saving significant costs compared to dealership servicing.
Engine Mechanical:
Complete overhaul, component testing, timing, sealing.
Engine Management:
Ignition system, fuel injection/carburetion, emissions control.
Transmission:
Manual & Automatic gearbox overhaul, clutch, drive shafts.
Suspension:
Hydropneumatic suspension system maintenance, repair, fluid service, component replacement (spheres, regulators, pumps).
Brakes:
Hydraulic system, discs, pads, lines, parking brake, Hydractive system integration (if applicable).
Steering:
Power steering system, column, linkage.
Electrical:
Wiring diagrams, lighting, instrumentation, starting/charging systems, body electrics, fuses, relays.
Bodywork:
Panel repair, rust treatment, doors, windows, interior trim, seals.
Routine Maintenance:
Oil changes, filter replacements, fluid checks, spark plugs, belts.
Troubleshooting:
Diagnostic charts, common fault finding for all systems.
Repair Procedures:
Step-by-step instructions for component replacement and system overhauls.
Diagnostics:
Fault code interpretation (if applicable), system testing, electrical component diagnostics.
Wiring Diagrams:
Comprehensive, detailed wiring schematics for all vehicle systems.
Depth:
In-depth, professional quality, covering all areas of repair and maintenance.
Engine Options Summary:
The BX was offered with a range of petrol engines (including XU series) and diesel engines. Common petrol engines included 1.4L, 1.6L, and 1.9L carbureted or fuel-injected units. Diesel options typically included 1.9L naturally aspirated and turbocharged variants.
Typical Performance 1.9L Petrol:
Approx. 90-110 hp (DIN) depending on injection/carburetion.
Typical Performance 1.9L Diesel:
Approx. 60-70 hp (DIN) naturally aspirated, up to 90 hp (DIN) turbocharged.
Fuel System Types:
Carburetor (e.g., Weber, Solex) or Bosch L-Jetronic / K-Jetronic fuel injection (petrol engines), Direct Injection (diesel engines).
Cooling System Type:
Pressurized liquid cooling system with thermostat and fan.
Ignition System Type:
Distributor-based electronic ignition (later models may feature distributorless systems).
Standard Transmission:
Typically a 5-speed manual transmission.
Optional Transmission:
ZF 3-speed or 4-speed automatic transmission was an option on many models.
Drive Layout:
Front-wheel drive (FWD).
Transmission Fluid:
Specific manual or automatic transmission fluid types as per Citroën specifications (e.g., LHM for certain automatic variants, GL-4 for manuals).
Exterior Dimensions Typical:
Length: ~4150-4170 mm, Width: ~1600-1650 mm, Height: ~1350-1400 mm (subject to variation by body style and suspension setting).
Interior Space:
Known for its spacious cabin and innovative interior design, offering good legroom and headroom for its class.
Cargo Capacity:
Typically around 400-500 liters for the hatchback version, expandable with rear seats folded.
Curb Weight Typical:
1050-1200 kg, depending on engine and equipment.
Safety Ratings:
Modern safety ratings (like Euro NCAP) were not prevalent during the BX's primary production run. However, it featured crumple zones and generally good passive safety for its era.
Active Safety Features:
Four-wheel disc brakes (ventilated front on most models), power-assisted braking system, self-levelling suspension providing consistent handling.
Passive Safety Features:
Front seat belts, optional rear seat belts, energy-absorbing steering column, reinforced passenger cell.
Infotainment Systems:
Basic in-car entertainment systems for its era, typically comprising of an AM/FM radio, often with cassette player. Later models might have had optional CD players.
Driver Assistance:
Limited by modern standards. Key 'assistance' features were its self-levelling suspension and power steering, enhancing drivability and comfort.
Connectivity Features:
No modern connectivity features such as Bluetooth, USB ports, or smartphone integration were available during its production run.
Oil Change Interval:
Typically every 7,500-10,000 miles (12,000-15,000 km) or 12 months, whichever comes first. Consult manual for specific engine variant.
Timing Belt Interval:
Critical maintenance item. Interval varies by engine but often around 60,000-90,000 miles (100,000-150,000 km). Failure can cause severe engine damage.
Engine Oil Specification:
API SG/SH or ACEA A2/A3 rated oils, viscosity typically 10W-40 or 15W-50 depending on climate and engine type. (Specific grade required).
Suspension Fluid:
Citroën LHM (Liquide Hydraulique Minéral) Plus is essential for the hydropneumatic suspension. Incorrect fluid will cause severe damage.
Coolant Specification:
Ethylene glycol-based antifreeze, typically a 50/50 mix with distilled water. Specific OAT or HOAT type as per manufacturer recommendation.
Suspension Spheres:
Spheres require periodic re-gassing or replacement as they age and lose pressure, affecting ride comfort and height.
Electrical Gremlins:
Aging wiring and connectors can lead to intermittent faults in various electrical systems. Thorough diagnosis is key.
Hydropneumatic Leaks:
Hoses, seals, and pump seals can degrade over time, leading to fluid leaks and loss of suspension pressure.
Rust Corrosion:
Common in older vehicles, particularly around wheel arches, sills, and door bottoms. Requires regular inspection and treatment.
Citroen Heritage:
Citroën has a long history of technological innovation, particularly with its hydropneumatic suspension systems pioneered by the DS and GS models, which heavily influenced the BX's design.
Bx Evolution:
Introduced in 1982, the BX replaced the aging GS/GSA. It underwent several facelifts and technical updates throughout its production, including the introduction of the more powerful 16-valve GTi model and minor styling revisions. The 'Hydractive' system was introduced later in the BX's life, offering enhanced ride and handling.
Production Locations:
Primarily manufactured in France (Rennes-Vitre) and also assembled in other countries, including the UK.
Total Production Units:
Over 2.3 million units produced worldwide.
Design Awards:
While not a recipient of specific 'Car of the Year' awards in major publications, the BX was recognized for its innovative design and comfort by automotive journalists and enthusiasts of its time.
Reliability Perception:
Perception of reliability varied, with some models being very robust while others required diligent maintenance due to the complexity of the hydropneumatic system and electrical components. This manual is crucial for maintaining reliability.
