Latest Car Extreme

AC Schnitzer has prepared two production ready concept cars for this year's edition of the Geneva motor show. We've already told you about the first car, the diesel-powered 99d that is based on the BMW Z4 roadster, so here's the tuning firm's second proposal. The ACS5 Sport S Saloon is based on the latest BMW 550i sedan and is said to feature numerous performance and styling upgrades, though AC Schnitzer is keeping mum about most of the details.

According to the tuning house, the 550i's twin-turbocharged 4.4-liter V8 engine with 407HP and 600Nm has been modified to deliver 540HP and 750Nm, which helps the sedan model to complete the 0 to 100km/h (62 mph) sprint in 4.5 seconds and reach a top speed of 320 km/h (199 mph). AC Schnitzer said that despite the power bump, fuel consumption and CO2 emissions of the ACS5 Sport S are equivalent to the standard BMW 550i.

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AC Schnitzer has prepared two production ready concept cars for this year's edition of the Geneva motor show. We've already told you about the first car, the diesel-powered 99d that is based on the BMW Z4 roadster, so here's the tuning firm's second proposal. The ACS5 Sport S Saloon is based on the latest BMW 550i sedan and is said to feature numerous performance and styling upgrades, though AC Schnitzer is keeping mum about most of the details.

According to the tuning house, the 550i's twin-turbocharged 4.4-liter V8 engine with 407HP and 600Nm has been modified to deliver 540HP and 750Nm, which helps the sedan model to complete the 0 to 100km/h (62 mph) sprint in 4.5 seconds and reach a top speed of 320 km/h (199 mph). AC Schnitzer said that despite the power bump, fuel consumption and CO2 emissions of the ACS5 Sport S are equivalent to the standard BMW 550i.

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BMW's decision to create the new 'i' sub-brand for the growing number of eco-conscious buyers has apparently rubbed off its partners like AC Schnitzer, as the German tuning firm will be launching a production ready concept based on the Z4 hardtop-roadster at next week's Geneva motor show.

Developed as an eco-friendly sports car that adapts to AC Schnitzer's new motto "Efficient Performance", the 99d gets its name from its CO2 emission levels and the diesel powerplant housed under its hood.

More specifically, the tuning house fitted the Z4 with the BMW 320d Efficient Dynamic's 2.0-liter four-cylinder turbocharged diesel engine. After some performance upgrades, the four-pot's output was lifted from 163HP and 380Nm, to 190HP and 420Nm.

AC Schnitzer says the 99d can go from naught to 100km/h (62mph) in 6.9 seconds en route to a top speed of 235km/h (146mph), while returning an impressive fuel consumption of 3.8lt/100km (61.9 mpg US) with CO2 emissions of just 99.18 g/km.

To achieve these striking numbers, the German tuner also reduced the roadster's weight by 230kg (507 pounds).

"With the AC Schnitzer 99d, we've succeeded in building the previously inconceivable: an up-rated performance vehicle whose CO2 emissions have been reduced to 99 g/km and which, despite its sustainability, offers pure driving pleasure. That's Efficient Performance by AC Schnitzer," the company said in a brief statement.

According to the tuner, the price of the 99d is €149,000 or about US$205,500 at today’s exchange rates, but that's about all the details AC Schnitzer is willing to release before unveiling the car at the Geneva Salon.

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BMW's decision to create the new 'i' sub-brand for the growing number of eco-conscious buyers has apparently rubbed off its partners like AC Schnitzer, as the German tuning firm will be launching a production ready concept based on the Z4 hardtop-roadster at next week's Geneva motor show.

Developed as an eco-friendly sports car that adapts to AC Schnitzer's new motto "Efficient Performance", the 99d gets its name from its CO2 emission levels and the diesel powerplant housed under its hood.

More specifically, the tuning house fitted the Z4 with the BMW 320d Efficient Dynamic's 2.0-liter four-cylinder turbocharged diesel engine. After some performance upgrades, the four-pot's output was lifted from 163HP and 380Nm, to 190HP and 420Nm.

AC Schnitzer says the 99d can go from naught to 100km/h (62mph) in 6.9 seconds en route to a top speed of 235km/h (146mph), while returning an impressive fuel consumption of 3.8lt/100km (61.9 mpg US) with CO2 emissions of just 99.18 g/km.

To achieve these striking numbers, the German tuner also reduced the roadster's weight by 230kg (507 pounds).

"With the AC Schnitzer 99d, we've succeeded in building the previously inconceivable: an up-rated performance vehicle whose CO2 emissions have been reduced to 99 g/km and which, despite its sustainability, offers pure driving pleasure. That's Efficient Performance by AC Schnitzer," the company said in a brief statement.

According to the tuner, the price of the 99d is €149,000 or about US$205,500 at today’s exchange rates, but that's about all the details AC Schnitzer is willing to release before unveiling the car at the Geneva Salon.

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An automatic transmission is just that- automatic, consequently most people tend to pay very little attention to it until a major problem rears its ugly head.

Picture the scenario- you are driving along in the lap of luxury, the satellite radio blaring and the heated seats on. You have become accustomed to the comfort level and great driving experience brought to you by BMW.



You decide to stop at the local convenience store on your way home to grab some ice cream for the kids and a bottle of water for yourself. Upon returning to your car, you start it up, check your rear view mirror, put the shifter in reverse and then the unthinkable happens- the engine just revs as if it is in neutral and the car goes nowhere!

This article deals with the reasons behind an unexpected loss of reverse in certain BMW automatic transmission equipped vehicles, specifically the 3 series and 5 series vehicles that use the ZF5HP19 or steptronic transmission. This includes the popular 323i, 323ci, 325i, 328i, 330i, 525i, 528i, 530i, X3 and X5 models well as some others built in the 1999 to present model years.

To eliminate confusion, this does not apply to vehicles equipped with the GM 5L40 E transmission, just the ones with the sometimes problematic ZF5HP19. The 5L40 E has some issues of its own that are beyond the scope of this article but are certainly going to be the subject of another.


The failure rate for these transmissions seems to be very high and is expected to become much more of a problem as time goes by.

Typically, the vehicle is working perfectly while driving forward but when it is put in reverse there is a complete and permanent loss of movement to back up.

Reverse is typically a major feat for any transmission to accomplish- imagine the demands that are placed on a gearbox as it is asked to reverse the torque of your engine so that you can back up your nearly 4000 pound vehicle.

By far, the most common cause of the reverse problem in BMW's is the failure of the D-G clutch drum. Specifically, the snap ring that retains the D or reverse clutch breaks out of the clutch drum resulting in an inability for the clutch pack to apply.


The good news is that there is hope in regards to a proper repair. The factory has released an updated part that so far appears to be a permanent fix for this problem.

In our testing and in conjunction with several hundred successful repairs at our facilities, the new part seems to be metallurgically superior in several ways.

We have found that there is an improved radius area as well as slightly thicker casting. In addition to this, the grove that retains the snap ring is also relocated further away from the edge of the drum.


With this issue addressed and attention to detail in several other areas of the ZF5HP19 unit, the transmission can be repaired to "better than new" condition by a competent transmission rebuilder / remanufacturer. In fact, when properly repaired, the ZF gearbox becomes quite robust and can provide an almost indefinite service life.

This is a special tuner of BMW and Mini. But also today expanded its on BMW motorcycles. Been around since 1987, where they make high performance components for BMW include the chassis, custom exhaust system, lightweight racing wheels and aero kits. Many of the parts they are officially distributed at BMW dealerships around the world (738 dealers and 45 branch offices).

Among the BMW mania, AC Schnitzer name spelled Have a glorious prestige. One of the best achievements when they are bearing the "Fastest Street Legal BMW Thew IN The World" for the BMW M6 Tension. This is evidenced in Nardo Italy with power tracks 552 hp maximum speed 331.78 km / hr.


Filsosofi AC Schnitzer is a high performance driving performance, safety and reliability. In addition, the AC Schnitzer also makes interior parts made of carbon or aluminum for quality contol panel, steering wheel, pedals and other interior molding