VW’s 3.0-liter emissions fix fails to gain approval in California

VW’s 3.0-liter emissions fix fails to gain approval in California

Volkswagen‘s proposed fix for noncompliant 3.0-liter TDI engines has failed to gain approval from California regulators.

The Audi-developed three-liter cheating diesels were used in approximately 85,000 US-market vehicles including the Audi A8, Porsche Cayenne and VW Touareg, with model years dating back to 2009.

“VW’s and Audi’s submissions are incomplete, substantially deficient, and fall far short of meeting the legal requirements to return these vehicles to the claimed certified configuration,” the California Air Resources Board wrote in a letter, according to excerpts published by Reuters.

VW previously suggested it could bring all 3.0-liter TDI engines back into compliance in the US market. A source now tells Reuters that regulators have raised concerns over an auxiliary emissions control device that Audi failed to properly disclose and may be deemed an illegal ‘defeat’ device.

An Audi spokesperson downplayed CARB’s letter as a ‘procedural step’ under California state law. It is unclear if VW Group is close to submitting a revised proposal. If the dispute cannot be resolved, the company may be forced to buy back the offending vehicles.