Volkswagen, Audi and Porsche announced a stop-sale of certain models in their respective lineups earlier this week following the Environmental Protection Agency’s allegations that the second generation 3.0-liter V6 TDI engines contained a defeat device that circumvents the EPA’s emissions testing.

The stop-sale from the three brands does include their respective certified pre-owned vehicles with the engines — here are the affected models that franchises may still have on their lots as new or CPO vehicles equipped with the affected 3.0-liter V6 TDI engine:

Audi

— 2013 Audi Q7 TDI, CPO

— 2014 Audi A6 TDI, A7 TDI, A8 TDI, Q5 TDI, Q7 TDI; CPO

— 2015 Audi A6 TDI, A7 TDI, A8 TDI, Q5 TDI, Q7 TDI; new & CPO

— 2016 Audi A6 TDI, A7 TDI, A8 TDI, Q5 TDI; new & CPO (the Q7 was absent for this model year)

Volkswagen

— 2013 VW Touareg TDI, CPO

— 2014 VW Touareg TDI, CPO

— 2015 VW Touareg TDI, new and CPO

— 2016 VW Touareg TDI, new and CPO

Porsche

— 2014 – 2016 Porsche Cayenne diesel. 

The Porsche data available in the company's news release Tuesday did not specify whether the stop-sale affected only CPO or all used models. 

Brad Stertz, the senior manager of corporate communications at Audi of America, confirmed the above new and CPO stop-sales for both Audi and VW.

“The regulators say that it’s okay for customers and dealers to sell used cars still,” Stertz said, referring to the non-CPO variety. “And of course they’re still safe to drive and nobody (the customers) has to do anything until further notice.”

VW’s voluntary recall

Volkswagen announced Wednesday that it notified NHTSA regarding an upcoming voluntary safety recall of approximately 91,800 vehicles with 1.8- and 2-liter turbocharged gas engines from its 2015-2016 model year lineup.

The U.S. models, which include Beetle, Beetle Convertible, Golf, Golf SportWagen, Jetta and Passat, will be recalled due to some vehicles having an issue with the rear camshaft lobe, which has the potential to unexpectedly shear off from the camshaft.

If that happens, vacuum pump power is lost, resulting in the pump not delivering further vacuum supply to the brake booster, reducing engine power and causing the malfunction indicator light to come on.

After depletion of the vacuum reserve, the amount of effort it takes to depress the brake will increase. Reducing engine power and increasing the need for braking effort after the vacuum reserve has been depleted can increase the risk of a crash.

According to VW, no injuries related to this issue have been reported and it will notify all owners of affected vehicles and instruct them to arrange for an appointment at an authorized VW dealer for a remedy at no cost.