This heater and climate control unit is a direct-fit solution for Citroën C3 II and DS3 models, designed to restore precise manual control over cabin temperature, airflow direction and fan speed. Ideal for professional workshops and DIY mechanics who need a reliable replacement part listed under references 9675400280, 400018005 or 6452R3. The unit is compatible with cable-operated HVAC linkages and offers straightforward installation into original dashboard mounting points, helping you get the climate system back to proper working order quickly.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C3 II (A51), DS3
• Product Codes: 9675400280
• Other Numbers: 400018005, 6452R3

Fitment And Compatibility

Intended for vehicles using the manual heater/climate control panel with mechanical cable actuators. Confirm the part numbers 9675400280 / 400018005 / 6452R3 against the unit currently fitted to the vehicle when possible. Common applications include Citroën C3 II (A51) and DS3 dashboards that use cable linkages for temperature and flap control.

Function And Features

• Manual control of cabin temperature, fan speed and airflow distribution via mechanical cables.
• Prepared for original cable attachment points (type 6452R3 linkage).
• Direct-replacement form, fit and function for compatible dashboards — uses original mounting bosses and electrical connectors where applicable.
• Part numbers printed for quick identification: 9675400280, 400018005, 6452R3.

Replacement Procedure

Removal and installation should be performed by a competent mechanic or an experienced DIYer. Typical steps:

• Disconnect the negative battery terminal before starting work to avoid electrical shorts and preserve system settings.
• Remove the center dashboard trim panels to access the control unit; retain all screws and clips for reassembly.
• Note the position of each cable and clip before disconnecting — mark cables if necessary to ensure correct reattachment.
• Detach cables from the control levers, unplug any electrical connectors, and remove the mounting screws to free the unit.
• Install the new control unit in reverse order: secure mounting screws, connect cables to the correct levers, plug in connectors and test all functions (fan speeds, temperature change, flap selection) before reassembling trim.

Common Failure Reasons

• Mechanical Wear: Plastic lever ends, cable ends or internal slider components can fracture or wear out after years of use.
• Cable Fatigue or Breakage: Cable housings can seize or cables can snap, preventing proper movement of flaps or temperature sliders.
• Contamination: Dust, debris or spilled liquids can interfere with smooth operation and cause sticking or intermittent function.
• Broken Mounting Clips: Vibrations and repeated servicing can break mounting tabs, resulting in loose or misaligned control units.

Installation Recommendations

• Always disconnect the battery before disassembly to reduce the risk of short circuits and preserve vehicle electronics.
• Handle plastic levers and cable ends gently — they are often the weakest points and can break if forced.
• Before final reassembly, test all HVAC functions with the dash exposed to verify correct cable routing and full range of motion.
• If cables show signs of fraying, stiffness or corrosion, replace the cable assemblies at the same time to prevent premature repeat failures.
• Use OEM-type fasteners and ensure clips are fully engaged to avoid rattles and misalignment after installation.

This heater and climate control unit is suitable for professional garages and independent mechanics seeking a reliable part referenced under 9675400280 / 400018005 / 6452R3. Correct installation restores precise manual HVAC operation and improves cabin comfort for drivers and passengers.

Original heating control panel and air conditioning for PSA cars. A suitable solution, if the buttons do not work, the wheels do not respond smoothly, the undercoat flashes or fails to switch the air flow directions. Parts with codes 96753994XT, 96831720XT, 6452W7 and 6452R2 are often sought as a direct replacement for the original module in Citroën C3 II (A51) and DS3.

This driver ensures fan control, temperature settings, air distribution, A/C compressor, internal recirculation and rear window heating. Faults are typically manifested by “dead” buttons, spontaneous change in settings or backlight outages, most often due to wear of contacts or moisture in the interior. The replacement of the module is usually a quick and economical variant of repair compared to the complex search for defects in the cabling.

Installation is a plug -and -Play: when the battery is disconnected, the center frame of the dashboard (usually several Torx and the latch screws) is removed, the connectors are disconnected and the original panel snaps. The new piece is deployed in the opposite procedure. Before ordering, we recommend comparing the numbers of parts and layout of the controls with your original panel – for these models there are variants according to the equipment (eg air conditioning type, sub -volume).

Suitable for professional workshops and home mechanics looking for a quick replacement for the original non -functional panel. OEM quality guarantees proper compatibility with the vehicle’s on -board network and trouble -free communication with control units.

technical information

• manufacturer: dog (Citroën/Peugeot) – original part
• Model: Citroën C3 II (A51), DS3
• product codes: 96753994XT; 96831720XT; 6452W7
• additional numbers: 6452R2

Always verify compatibility by OE code and visually according to the layout of the buttons/drivers. Supplied as used original part of the removal without mounting material; Transfer any brackets or frames from the original panel.