Please confirm your vehicle model and year match this description before purchasing. Product overview and key benefits Function: Fan motor resistor (radiator fan control) that provides the required resistance to create a voltage drop in the fan circuit, limiting current flow and allowing multiple fan speeds. Problem solved: Restores reliable fan speed control when an original resistor fails or fan speeds become intermittent, helping prevent overheating and HVAC performance issues. Heat management: Designed to dissipate heat so the resistor can operate continuously and reliably under normal engine-bay conditions. Reliability: Replaces a worn or damaged resistor to restore factory-like operation of the radiator/cooling fan motor. Compatibility and identification Compatible models: Opel Astra, Opel Zafira, Opel Vectra Year: 2006 (confirm fit for your exact submodel and production date) Part numbers: 3134503108 and 94749639 (use these numbers to verify exact match with your vehicle) What to expect in performance Restores multi-speed fan control by limiting current to the fan motor at the appropriate levels. Helps maintain stable engine cooling and consistent cabin climate control when used as a correct replacement part. Heat-dissipating design supports continuous operation during normal driving conditions. Installation and fit notes Intended as a direct replacement for the specified part numbers on the listed Opel models; verify connector and mounting compatibility for your exact vehicle. Installation typically involves replacing the existing resistor in the radiator fan circuit; basic automotive electrical skills recommended. If unsure, compare the part numbers and physical connector to your original resistor before purchase. Practical use scenarios Replace a failed resistor after the fan only works on one speed or not at all to restore full fan speed range. Repair intermittent cooling fan operation that causes fluctuating engine temperatures or inconsistent HVAC performance. Routine maintenance during cooling-system service when part numbers match and the resistor shows signs of heat damage or corrosion. Purchase checklist Confirm vehicle make, model, and year match Opel Astra / Zafira / Vectra 2006. Verify part numbers 3134503108 or 94749639 against your original resistor. If you are not certain about fitment, consult a professional or compare the physical part before installation. This resistor is supplied to match the original function and specifications for the listed Opel models and part numbers.