BMW disputes reports its X3 model -- shown here at its debut -- doesn't meet emissions rules.

Both BMW and Daimler AG, parent of the Mercedes-Benz and Smart brands, have issued formal statements insisting they did not cheat on diesel emissions tests, unlike German rival Volkswagen and its Audi brand.

VW now has acknowledged that 11 million vehicles – including 482,000 sold in the U.S. – were secretly fitted with software designed to help them pass emissions tests. Otherwise, the vehicles delivered increased performance and better mileage but also produced up to 40 times the permissible level of noxious emissions.

Are other automakers cheating? And why would they? What about you, if you’re a diesel owner or still thinking about buying one? Here are some key questions and answers.

Q: We’re hearing reports that other manufacturers, including BMW and Daimler also may have cheated on emissions tests. What do we know so far?

A: The two German makers have issued statements insisting they haven’t cheated. The news reports from Europe are so far based on limited information or a handful of random test results that could prove false or inaccurate. Italy plans to test about 1,000 diesel vehicles randomly, and that could give a better answer. U.S. regulators also are expected to do follow-up tests, possibly using different procedures that wouldn’t be fooled by software similar to the so-called “defeat devices” on VW’s products.

VW's woes also affect Audi, which uses the small EA 180 engine in vehicles like the A3.

Q: Why did VW cheat and why wouldn’t other manufacturers have to?

A: The Volkswagen models implicated in the scandal are all small-displacement 4-cylinder engines. The maker claimed it had developed a way to keep their emissions at minimal levels without having to use the special urea additive needed by the bigger diesels most competitors rely on. Indeed, this additive is used in 6-cylinder VW diesels that so far appear to meet U.S. and foreign emissions rules. Diesels are inherently dirty engines, but the use of urea and special components, such as catalytic traps, significantly reduce their emission of smog-causing oxides of nitrogen and micro-fine particulates.

Q: Which VW models are affected by the EPA alert?

A: All VW vehicles equipped with the maker’s EA 189 diesel engine. In the U.S., that includes 482,000 vehicles    : the Jetta, Beetle, Audi A3 and Golf from the 2009-2015 model years, and the Passat from the 2014-2015 model years. VW is expected to recall them when it comes up with a fix. In the meantime, it has told U.S. dealers not to sell models equipped with the 2.0-liter engine – which accounts for about 25% of its sales in this country.

Q: If you own one of those VW models, what should you do? Wait for a repair? Sell it?

A: The good news is that the software problem doesn’t create a safety risk like General Motors’ ignition switch defect. So, keep on driving. Selling one of the affected vehicles now would likely mean taking a real hit on your trade-in price. Conversely, if you don’t mind owning one, you might be able to get a steal on a used VW diesel.

 

Most makers use a urea additive to help clean up their diesel emissions. VW's EA 189 doesn't.

Q: Is VW going to fix these vehicles? If so, what would that entail?

A: That’s a question VW itself is trying to answer. The software cheat apparently was developed because the German maker otherwise couldn’t deliver everything it promised: low emissions, high mileage and good performance. It will try to fix things with new software code, but if it can’t it may have to make modifications to the EA 189 engine itself. There is even the possibility VW might be forced to replace some or all of the vehicles or pay owners if the fix impacts performance and mileage. A number of class action lawsuits have been filed on behalf of owners to cover potential losses, as well.

Q: Will diesels, more broadly, survive this crisis?

A: “This is a black eye for the diesel,” says Ed Kim, research director at AutoPacific, Inc. The technology is wildly popular in Europe, and likely to remain so. Here in the U.S., diesels fell out of favor in the U.S. in the late 1980s because of the problems of older-styled engines, only recently regaining momentum. Kim and others expect a sharp decline in sales, at least short-term, in the light-duty market. But diesel should remain the dominant powertrain technology in the medium and heavy-duty truck segments.

(For more on how the VW scandal will affect diesel sales, Click Here.)

Q: Should I still consider buying a diesel? Or is a hybrid or regular gasoline car a better solution?

A: Hybrids and so-called clean diesels profess to address the same issue: reducing emissions of global warming gases while delivering great fuel economy. But where hybrids tend to sacrifice performance, diesels score on the fun-to-drive factor. They tend to get lower fuel economy than gas-electric models in the city, but shine on the highway. That said, the latest turbocharged conventional gas vehicles are getting better and better mileage, often without sacrificing performance, either. Check the data and go for a test drive to see which model is right for you.

The new diesel version of the Chevy Colorado.

Q: Who else offers a diesel in the U.S.?

A: There are now 13 brands selling diesel vehicles here, among the newest Jaguar and sibling Land Rover. European marques, including VW, Audi, Mercedes and BMW, dominate, but American, and even Japanese, makers have joined the fold. Fiat Chrysler scored a hit with the Eco Diesel version of its Ram 1500 pickup. Nissan will soon add a diesel to its redesigned 2016 Titan, and Chevrolet has diesel options for its Cruze sedan and new Colorado pickup. Ironically, Mazda wanted to offer a small diesel that also skipped the use of urea, but it couldn’t meet emissions without sacrificing performance and mileage.

(Click Here  for a review of the Range Rover Sport Td6 diesel.)

Q: What will happen to Volkswagen now?

A: It’s likely to take some time before we learn the extent of the repercussions from the cheating scandal which some fear could destroy the company. It has already set aside $7.3 billion to cover potential costs – but that could prove low. It potentially faces $18 billion in fines from the EPA alone. There’s also a Justice Department investigation that could see criminal charges and fines. And a number of class action lawsuits have been filed. Authorities around the world are now investigating the scam and could take actions of their own.

(Click Here for the latest on the VW scandal.)

Q: How common is cheating in the auto industry?

A: We’ll likely never know the full extent of the problem, as some makers have undoubtedly gotten away with their own scams. But many have been caught in recent years. VW itself was first found to be cheating on emissions tests back in 1973. Hyundai and sibling Kia last year paid fines for falsifying fuel economy numbers. Ford also overstated mileage. General Motors was fined $900 million for concealing an ignition switch defect for a decade, and Toyota was hit with a $1.2 billion fine for improper actions related to its unintended acceleration issues.

(VW cheated on emissions as far back as 1973. Click Herefor the story.)

Don't miss out!
Get Email Alerts
Receive the latest Automotive News in your Inbox!
Invalid email address
Give it a try. You can unsubscribe at any time.