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VOLKSWAGEN VW GOLF MK6 08-12 1.6 TDI AUXILIARY WATER PUMP 5N0965561A - CAY CAYC

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#126


VW Golf MK6 2011 1.6 TDI (CAYC) Auxiliary Water Pump / Secondary Coolant Pump

Part Number: 5N0965561A


Removed from a Volkswagen Golf MK6 2011 1.6 TDI (CAYC engine).

Genuine auxiliary (secondary) electric coolant pump, used to circulate coolant through the engine and EGR system when required.


Condition: Used item, may have minor marks, scratches or signs of wear due to storage and age. Fully working unless stated.


Important: Please ensure the part number 5N0965561A matches your existing unit before purchasing, as multiple revisions exist (e.g. 7N0965561A, 1K0965561F) depending on model and system setup.


Compatibility:

Fits VW Golf MK6 1.6 TDI models (2009–2013)

Engine codes: CAYC, CAYB

Also used across VW / Audi / Seat / Skoda 1.6 & 2.0 TDI engines with the same OEM reference.


Position:

Engine bay – cooling system circuit (often near bulkhead / EGR cooler / heater circuit)


Function:


* Circulates coolant independently of engine-driven water pump

* Supports EGR cooler and heater system cooling

* Helps maintain temperature after engine shutdown

* Improves efficiency and prevents overheating in specific conditions


Technical Info:


* Type: Electric auxiliary pump

* Voltage: 12V

* Typically 3-pin connector

* Works alongside main mechanical water pump


Common Fault Symptoms:


* Engine overheating (especially at idle)

* Heater not working correctly

* Fault codes related to coolant circulation

* Cooling fan running excessively


Additional Info:


* Also known as secondary coolant pump / after-run pump

* OEM manufacturers include Pierburg / Bosch / VDO equivalents

* Often replaced when diagnosing cooling or EGR-related issues

* Recommended to check hoses and coolant condition during replacement

Brand: VOLKSWAGEN

Manufacturer Part Number: Does Not Apply

Reference OE/OEM Number: Does Not Apply

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