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Located on the cylinder head, the standard coolant hose connector is made of plastic that inevitably goes brittle and is a frequent failure point on the MQB 1.8T & 2.0T engines. Replacing the standard plastic coolant connector in favour of the Prosport solid aluminium connector will eliminate this inevitable failure!

The Prosport uprated coolant hose connector is a direct replacement for the OE part 06K121143, not only is it much more durable than the stock plastic connector it also has an increased bore to allow better flow.

The uprated Prosport coolant hose connector fits most 1.8T & 2.0T Gen 3 applications and any of the VAG group cars that have the 06K121143 plastic connector as standard, including some of the most popular below: 

  • VW Golf MK7 GTI
  • VW MK7 Golf R 2.0T
  • VW Golf MK7 1.8T
  • VW Golf MK7 GLI
  • Audi 8V A3 / S3
  • Audi B9 A4

The Prosport aluminium coolant hose connector replaces factory part number 06K121143 which is fitted to many of the VAG group cars, if unsure then just check that your original plastic part is  part number 06K121143, if it is then this is the perfect upgrade for your car.


Many cheaper/poor quality import alternatives in the market place will tend to corrode or crack when subjected to prolonged contact with water/antifreeze or varying temperatures. It can be very difficult to identify quality parts at the right price in amongst the masses of cheap/poor quality imported parts flooding the Ebay marketplace so peace of mind can be assured with our premium products & guarantees as this is most certainly a product that you will only need to buy once.