Description
Regulator, fan resistor by VALEO for CITROËN and PEUGEOT vehicles. Fits models CITROËN C1 and Peugeot 107 and TOYOTA Aygo. Resistive control for the climate system.
Product Overview
High-quality blower motor regulator (fan resistor) designed for reliable control of ventilation speeds in Citroën C1, Peugeot 107 and Toyota Aygo. This Valeo resistor (part reference 6445ZA) provides stepwise, resistive control of the HVAC blower motor, ensuring consistent fan speed selection across the dashboard controls. Ideal for professional workshops and experienced DIY mechanics looking to restore correct heater/ventilation operation.
Key Benefits
- Direct replacement for original OE-style resistive regulators — restores intermediate fan speeds.
- Durable construction by Valeo for long-term thermal resistance and electrical stability.
- Straightforward fitment for quick workshop or home repair — saves time compared to troubleshooting electrical faults.
- Part number searchable: 6445ZA / 6445.ZA — commonly used in online parts lookups.
Compatibility
Designed to fit:
- Citroën C1
- Peugeot 107
- Toyota Aygo
Technical Information
- Manufacturer: Valeo
- Model: Citroën C1; Peugeot 107; Toyota Aygo
- Product Codes: 6445ZA; 6445.ZA
- Other Numbers: C1/107 (application reference)
Symptoms Indicating Failure
- Blower works only on the highest speed setting or only on one or two speeds.
- Intermittent fan operation or complete loss of blower control.
- Burnt smell from dashboard area or visible corrosion/damage at the resistor connector.
Why This Part Fails
The most common causes are prolonged thermal stress and corrosion. The resistor dissipates heat while dropping voltage for lower fan speeds; over time this causes degradation of the resistive elements and connectors. Excessive current draw from a worn or failing blower motor, moisture ingress from leaks or condensation, and dirty air channels that reduce cooling also accelerate failure.
Replacement And Installation
Typical location: Mounted in the blower motor housing behind the glovebox or under the dashboard on the passenger side (Citroën C1 / Peugeot 107 / Toyota Aygo family layout). Basic replacement steps for experienced mechanics:
- Disconnect the negative battery terminal before starting to prevent short circuits and protect vehicle electronics.
- Remove the glovebox or access panel to reach the blower motor area.
- Locate the resistor module attached to the blower housing and unplug the electrical connector.
- Unscrew the retaining screws/clips and withdraw the resistor module.
- Fit the new resistor, secure screws, reconnect the connector and test all fan speed positions before reassembly.
Check the blower motor current draw and brushes while replacing the resistor — a failing blower motor is a frequent reason for repeat resistor failures.
How To Diagnose
Quick checks for mechanics:
- Measure supply voltage at the resistor connector with the fan switched across different speeds; loss of voltage steps indicates resistor damage.
- Check continuity of the resistor element with a multimeter; open or heavily changed resistance values point to a failed unit.
- Inspect connector pins for corrosion or melting; poor contact causes heat buildup and failure.
Installation Recommendations
Always disconnect the battery before removal and follow the vehicle manufacturer’s removal procedure to avoid damage. Use appropriate hand tools and secure connectors firmly. If the blower motor shows signs of wear or draws excessive current, replace or service it at the same time to prevent premature failure of the new resistor.
Why Choose This Part
This Valeo blower resistor is a practical replacement that restores correct fan speed control and improves HVAC comfort. Its OE-style fit and known part codes (6445ZA / 6445.ZA) make it easy to identify during parts lookup and reduce installation time for technicians and experienced DIYers.
Note
There Is No Fixed Service Interval For Blower Resistors; Replacement Is Based On Symptoms And Condition. Regular Inspection Of The Blower Motor And Electrical Connectors Helps Extend Component Life.
Conclusion
If your Citroën C1, Peugeot 107 or Toyota Aygo shows reduced or erratic fan speeds, replacing the blower motor resistor with this Valeo unit (6445ZA) restores reliable HVAC control. Suitable for both workshop professionals and skilled DIY mechanics seeking a straightforward, OE-compatible solution.
