2008 Bmw X5 4.8i Sport Utility 4-door 4.8l on 2040-cars

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China probing German automakers over spare parts

The Chinese market has proven to be a boon to German luxury automakers. However, the way that the companies have allegedly been controlling their supply of spare parts has begun to draw the ire of the nation's government. According to insiders speaking to Bloomberg, officials from the country's economic planning organization have opened a probe into Audi, BMW, Mercedes-Benz and some Japanese carmakers over claimed price inflation and limiting supply.
Specifically, the investigation centers around two aspects of how the companies do business, according to Bloomberg. Investigators want to know whether the original equipment component makers are able to sell spare parts only to automaker-authorized dealers or if they are also available to independent shops. There is also the issue of whether the price markup on replacement pieces is too high. The tight controls could be partially explained by China's reputation for producing counterfeit parts.
Evidently, the investigators haven't checked parts prices at car dealers elsewhere in the world. At least in the US, paying more at the dealer for factory components just goes along with owning a vehicle. If evidence of price fixing is found, the companies could face fines the equivalent of millions of dollars, according to Bloomberg.

BMW M5 turns 30, celebrates sideways

BMW has a secret, and it's not telling. The brand's M Power blog is celebrating the 30th anniversary of the M5 and is taking a look back at previous models of its Autobahn-storming sedan, but it says that it will end "with a surprise." The celebration kicks off with a short video showing the latest M5 making some smoky donuts.
The original M5 debuted in 1985 and was the company's most expensive model at the time. Still, it packed a 3.5-liter six-cylinder generating a claimed 282 horsepower (286 PS), which was rather potent in its day. The company touted it as the world's fastest production four-door sports sedan at the time.
BMW won't reveal the surprise until it has chronicled all five generations of the M5, but it wouldn't be shocking to see an anniversary edition model appear sometime later this year. Scroll down to check out the video of the muscle sedan celebrating its birthday the only way it knows how.

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.