Dual Radiator Fan Assembly 1K0121207BB for VW Golf/Jetta/Passat/Tiguan/Audi A3 2005-2018 1.9L/2.0L

Dual radiator fan assembly 1K0121207BB is the twin fan module used on the Volkswagen Golf V and VI, the Jetta V, the Passat B6, the Tiguan and the Touran, and on the Audi A3 8P, Skoda Octavia II and SEAT Leon 1P that share the same front end. The assembly carries two 300 mm fans in one wide shroud, one on each side of the radiator, and both are needed for the air conditioning to work in slow traffic.

The two motors are wired in parallel through a single connector and a control module on the shroud. When one motor seizes, the other keeps running, and the driver may not notice anything until a hot day with the air conditioning on. The seized side then becomes a blockage: the working fan pulls air through only half the core, the condenser pressure rises, the compressor cuts out, and the coolant temperature climbs. A fan that howls but moves no air is usually a motor that has seized and is being driven through a slipping coupling.

Because the module is shared, a fault in either motor can take out the control unit and leave both fans dead. Check the 40 amp fuse, the connector pins and the earth lead on the left chassis leg before fitting a new assembly. On a Passat B6 the fan shroud also carries the power steering cooling loop on some versions, so check the pipe routing before pulling the unit out.

Fitting takes about an hour. Disconnect the battery, remove the intake duct and the engine cover, unplug the two fan connectors, undo the four bolts around the shroud and lift the assembly out with the radiator steady. The new unit goes in the same way, with the lower pegs engaging the radiator tanks first. Refill nothing because the cooling circuit is not opened, but run the engine with the air conditioning on and confirm that both fans turn at the same speed.

Supplied as one complete dual fan assembly with both motors, blades and control module. Twelve month warranty.