This is a high-quality A/C heater fan blower motor tandem resistor (air regulator), designed as a direct replacement for VW and Audi vehicles. It replaces OEM part numbers 3C0907521F, 3C0907521D, 3C0907521B and controls the speed of the HVAC blower motor, restoring proper fan speed regulation and cabin heating/cooling performance.
Key Features
- Direct replacement for 3C0907521F / 3C0907521D / 3C0907521B
- Controls blower motor speed for reliable air conditioning and heating operation
- Premium built-in thermal fuse for overheat protection
- Plug-and-play design, no modification required
- Durable construction for long service life under hood conditions
- Ideal for repairing non-working fan speeds or intermittent blower issues
Cross Reference OEM Numbers
- 3C0 907 521 F
- 3C0 907 521 D
- 3C0 907 521 B
Compatible Models
- Volkswagen: Golf, Passat, Touran, Tiguan, Jetta, Caddy
- Audi: A3, Q3, TT
- Other VW Group models with the same blower resistor configuration
Usage Notes
- Professional installation recommended
- Verify original part number before ordering
- Disconnect battery prior to installation for safety
