Heater core leaks are common in this model, more so if the wrong anti-freeze/coolant is used in the cooling system.
Average mileage: 122,750 (85,000–182,000)
24 people reported this problem
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Heater core failed in 2008. Began leaking when A/C was on quite badly in 2010. Heater failed completely in 2011. Didn't have the $500 which covers the labor (independent garage not VW) to pull the entire dashboard to replace the heater core. Bypassed heater in the meantime.
VW Jetta 2008 Wolksburg only use VW coolant
First leaking from front antifreeze had fixed now heater core spitting antifreeze to inside car