Are you having problems with your 2009 Volkswagen Golf? Let our team of motoring experts keep you up to date with all of the latest 2009 Volkswagen Golf issues & faults. We have gathered all of the most frequently asked questions and problems relating to the 2009 Volkswagen Golf in one spot to help you decide if it's a smart buy.
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Pistons can melt for a number of reasons, but essentially it’s because the piston is getting too hot. It could be because of pre-ignition, a lack of cooling for the piston itself as it was for the Nissan Patrol turbo diesel when it was melting pistons, or it could be something else. That they are only changing the pistons isn’t necessarily an issue, it really depends on the pistons they use. If it were correct that they are having problems and are getting pistons from Germany I would hope that they have made a change to the piston design that would correct the problem. If they are simply replacing the pistons with ones that are the same as those that failed then you could reasonably expect to have them fail again. I would demand to know exactly what they are doing in the rebuild, so you know everything they do and you can make a proper assessment. It wouldn’t be a surprise to me if they installed a recalibration in the engine computer to alter the ignition settings.
VW has issued an alert to dealers and owners about a problem with the engine electronics of the TSI engine, advising owners not to drive their cars if they are experiencing any misfiring. Owners who are should report their problems to their dealers who can reset the engine's knock sensors to fix the problem. If it's not addressed VW says it could cause damage to the engine, as it seems could be the case with yours. So ask the dealer to show you what has been done to ensure the problem won't occur again. Other Golf owners with this engine should contact their dealers and ask about having the change done on their cars.
We have had a few similar reports of problems with the VW engines, and the DSG gearbox in particular, and have taken the issue up with VW in an attempt to clarify the situation. At this point we don't have an explanation, other than some anecdotal information that suggests that if the DSG gearbox fails, it does so at quite low kays, and that if that doesn't occur it seems to run troublefree. I know of a number of people with Golfs and the DSG gearbox who haven't had any issues.
You could try disconnecting the battery, and then reconnecting it, which will reboot the system, and it might eject the CD in the process. Other that you would have to remove the CD player and have a car audio specialist dismantle it and remove the offending disc.