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BMW X3 ensnared by diesel emissions probe

Volkswagen may not be the only German automaker ensnared by this whole diesel debacle. The latest reports suggest that BMW could be guilty of the same offense. According to Bloomberg, citing a report from Germany's own Auto Bild magazine, the X3 could be over the European legal limit for emissions. The report suggests that a BMW X3 xDrive20d registered tailpipe emissions more than 11 times the limit under testing by the International Council on Clean Transportation. The council is the same that triggered the investigation into Volkswagen that led to the automaker's admission that it cheated on emissions tests for its diesel vehicles and the subsequent resignation of its chief executive. Volkswagen admitted to installing software that initiates additional emissions controlling measures when it detects that the vehicle is being tested. For its part, however, BMW denies that it has any such similar system in place, noting that many of its vehicles have passed testing by the same organization. Whatever the truth in BMW's case, it may not emerge unscathed. Bloomberg reports that the company's stock fell as much as 9.7 percent – the most it has lost in over four years – amid concerns that it could be implicated in the scandal as well. Shares in rival automaker Daimler also dropped by 5.8 percent. Volkswagen has already lost over $20 billion in market value in the midst of the scandal. The German government and European Union are considering implementing more restrictive standards and more thorough testing on diesel engines in order to prevent this sort of thing from recurring.

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

BMW recalling 140,000 electric Mini Cooper SEs for battery issue

BERLIN — German automaker BMW is recalling electric Mini Cooper SE vehicles due to problems in their batteries, which could potentially affect more than 140,000 autos worldwide.  Included in the recall are 12,535 Mini SEs sold in the United States. Around 39,000 vehicles could be affected in Germany, the company said in a statement on Monday, adding that there are no known accidents or injuries caused by the problem. Problems in the battery system can lead to overheating. "A vehicle fire, even when the vehicle is parked, cannot be ruled out," the statement said. There was such a "thermal event" in the U.S. in October 2023, then another in Germany in January 2024. Both have been under investigation. BMW will install a software update in the EVs. The update contains a diagnostic function that will recognize a malfunction of the battery and alerts the driver. The NHTSA recall statement says the software will then somehow discharge the battery to less than a 30% state of charge. Customers who received the message are asked to visit a Mini partner, the company said.