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Fuel Injector Replacement

Model: Volkswagen Polo MK IV, Polo 4, 9N, MK 4, Polo IV - Years: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Part: Fuel injectors

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Keeping the injectors in good condition improves fuel atomisation, resulting in many benefits: better performance, reduced consumption, and lower emissions. Periodic replacement of the injectors provides these advantages.

To replace them, disconnect the electrical connectors attached to the various coils, then undo the screws of the support rail that delivers fuel. It is not necessary to remove the inlet pipe.

Using pliers, remove the circlip that holds the injector in place and then pull it out of the support. Insert the new injector and replace the clip to secure it. Repeat this process for all injectors.

Reassemble the rail and reconnect the electrical circuits. Conduct a verification test.


Updated on 8 February 2026 by ScegliAuto


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