Description
Climate Heating Control VISTEON for Citroën C5 II and Peugeot 407.
This VISTEON climate heating control unit is a direct replacement for the factory HVAC controller used on Citroën C5 II and Peugeot 407 models. Designed for professional workshops and competent DIYers, the module controls blower speed, temperature selection, air distribution modes and auxiliary heating/air conditioning commands. Commonly searched by part numbers, this unit restores precise cabin climate regulation and responsive button/knob operation, helping to eliminate intermittent heating, stuck fan speeds or unresponsive mode selection.
Compatibility: Fits Citroën C5 II and Peugeot 407 when specified by matching control unit part numbers. Ideal for garages and enthusiasts who need a reliable, plug-in replacement for a failed dashboard HVAC controller. Using the correct product code ensures correct fitment and connector compatibility.
Technical Information
- Manufacturer: VISTEON
- Model: Citroën C5 II / Peugeot 407 HVAC Control
- Product Codes: 96573328YW, 6451RQ, 6451RR
- Other Numbers: Stellantis cross-references and related OEM tags may include the codes listed above
Installation Recommendations
Recommended tools: trim removal tools, 7–10 mm socket set, Torx bits, and a multimeter for verification. Typical replacement steps:
- Disconnect the negative battery terminal to avoid short circuits and protect electronic modules.
- Remove the center console trim and any surrounding panels using plastic pry tools to avoid damage.
- Unscrew the HVAC control unit fasteners and carefully pull the unit forward to access the wiring connectors.
- Release electrical connectors by pressing the locking tabs; note any alignment pins for correct reassembly.
- Fit the new control unit, reconnect the harness, and verify all functions (fan speeds, temperature adjustment, mode selection, A/C commands) before reassembling trim.
- Reconnect the battery and perform a final check of climate system operation and any dashboard error indicators.
Why The Part Most Often Fails
Failures typically occur due to long-term wear of mechanical switches and potentiometers, degraded LCD/display elements, moisture ingress or corrosion of connector pins, and thermal stress from repeated heating/cooling cycles. Electrical surges and poor grounding can also cause intermittent operation or total loss of control. Symptoms include unresponsive buttons, incorrect fan speeds, loss of temperature control or inconsistent air distribution.
Buying tip: Match one of the product codes above with the unit currently fitted in the vehicle to ensure correct replacement. For professionals, checking connector pin condition and supply voltage during diagnosis speeds up repair and prevents repeated failures.
