Nov 19, 2015 5:19 PM by News Staff
DETROIT (AP) - When Volkswagen submits a plan to fix emissions-cheating diesel engines on Friday, it will have only two options for most of the cars.
It can install a bigger exhaust system to trap harmful nitrogen oxide, or it can retrofit a chemical treatment process that cuts pollution.
The bigger exhaust will likely hurt performance and gas mileage, angering car owners. But the chemical treatment, while saving acceleration and mileage, needs a clumsy storage tank and multiple hardware changes to work. In either case, almost a half-million cars would have to be recalled for the repairs.
Experts say both options will be expensive, perhaps so costly that it will be cheaper to buy back some of the older models.
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