Along with automatic transmission problems, there are also problems with engine stalling and cooling, making the Mk5 GTI years 2006 and 2007 one of the worst for the GTI line. Sixth-generation Golf GTI (2009 and 2011 model years) One of the most common (and inconvenient) problems with the Volkswagen Golf is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working. The low-pressure fuel pump is solid with its values but the problem is with the HPFP. When under load the pump cannot produce the required 50 psi of pressure. This is where I need help, Mechanics have recommended upgrading the fuel pump to an aftermarket one or upgrading the fuel pump internals and I just want someone to verify that before I Re: Electrical problems with my MK5 GTI ! « Reply #7 on: December 23, 2014, 10:57:04 pm » Charging the battery wont do much, if the alternator wont charge it then its game over, probably best to send a new battery in. Especially for the cold winter starts!! Re: MK5 2.0 GT TDi injectors. I had this very same problem with my 2006 1.9tdi golf. Took the car in for a service when I first bought it, mechanic said the glow plug in 4th cylinder kept spinning, so they had to drill it out and rethread the glow plug port. That's when the problem started. 4. High-Pressure Fuel Pump. Continuing with direct fuel injection, the high-pressure fuel pump (HPFP) is another common failure on the Volkswagen MK6 GTI. The CCBZ engine employs two fuel pumps: a low-pressure pump in the tank and a high-pressure pump mounted on the back of the cylinder head. I am looking at getting an MK5 R32, Viewing one on saturday as was wondering what common problems they have/ things to be aware of. Looking for going for a 55 or 06 model as dont want to pay the tax. DSG would be great as coming from a manual MK5 gti. The Volkswagen MK6 GTI 2.0T TSI took the MK5 and made it more appealing. It was better than just a facelift. It took what the MK5 did well and made significant improvements to the car at every corner. The MK6 is still an incredible platform and is more affordable than ever, but they’re becoming older and will need some maintenance. nsKs.