The company warns that the rear camshaft lobe is prone to unexpectedly shear off from the shaft. The failure causes reduced engine power and loss of vacuum pump power, cutting vacuum supply to the brake booster and eventually resulting in increased braking effort.
“A reduction in engine power and/or increased need for braking effort after vacuum reserve has been depleted while driving can increase the risk of a crash,” a statement cautions.
The campaign affects approximately 92,000 vehicles including the 2015-2016 Beetle, Beetle Convertible, Golf, Golf GTI, Golf SportWagen, Jetta and Passat.
In its latest report to the National Highway Traffic Safety Administration, the company noted that the root cause of the camshaft failures has not been fully understood. Workers are still continuing an in-depth failure analysis and development of a repair solution, however a fix may not be ready until the end of the first quarter next year.
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