Owners of some Volkswagen TDI models are experiencing premature selective catalyst reduction (SCR) failures because of AdBlue heaters that, in some cases, aren’t lasting more than 50,000 miles.
According to a source who spoke to TTAC under the condition of anonymity, many Volkswagen TDI owners are arriving at dealerships after seeing check engine lights for failing AdBlue (diesel emissions fluid) heaters. Those heaters, explained the source, fail “based more on time than mileage” and cost over $1,000 to replace.
The cost of the parts and labor is a slap to the face for many TDI owners, as SCR systems in those cars are not scrubbing the required amount of NOx from diesel exhaust even when the AdBlue heaters are operating properly.
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