2021 BMW M550i xDrive acceleration challenge mounted with over-the-air replace

BMW statements the 2021 M550i xDrive does to 60 mph in 3.6 seconds, however when Car and Driver examined it quite a few months in the past, the sports activities sedan was significantly slower. The dash took a disappointingly vital 4.1 seconds, which was two-tenths of a 2nd slower than C&D’s X5 M50i check out, an SUV with the equivalent engine that carries all-around no a lot lower than 856 kilos (388 kilograms) over the M Basic efficiency 5 Sequence design.

So, what gives? Some can be tempted to say there was a factor mistaken with that individual vehicle, be it the engine, tires, gearbox, traction deal with, or the all-wheel-drive system. Following a when, C&D obtained involved with BMW U.s. to redo the check out and see if they might be able to strengthen the dash time. That they had been, however hitting 60 mph from a standstill took 3.9 seconds, so nonetheless three-tenths of a second way over what’s penned within the specs sheet. Ordinarily, the true-daily life assessments executed by Car and Driver end in extra quickly acceleration than what a producer claims, specifically when working with German manufacturers. These are acknowledged to intentionally underrate the efficiency of their sporty vehicles and vans.

In the midst of the 2nd try, the thriller was solved by BMW’s engineers, discovering a software program package deal glitch to be the offender for the M550i xDrive’s unusually gradual begin off the road. Particularly, it was a “miscommunication among the many engine laptop and the automotive’s balance-control module,” lowering a few of the V8’s potential in a tough launch from mph. The identical challenge plagues the 540i xDrive, additionally from the 2021 mannequin yr.

2021 BMW M550i xDrive acceleration challenge mounted with over-the-air replace

This earlier summertime, BMW educated homeowners of the 2021 M550i xDrive {that a} restore for the acceleration problem would get there afterwards. That day has come because the software program error can now be mounted both by an in extra of-the-air replace or getting the automotive to a service center. C&D was naturally curious to come back throughout out no matter whether or not the issue has been solved, in order that they borrowed an extra press auto to finish a 3rd and shutting verify.

Simply after unlocking the entire 523 horses created by the twin-turbo, 4.4-liter motor, the “M5 Lite” ran the dash to 60 mph simply three and a 50 % seconds, due to this fact creating it a tenth of a 2nd than what BMW says. Via the examination, it accomplished the quarter mile in 11.8 seconds at a lure tempo of 119 mph (192 km/h).

For an much more rapidly 5er, there are a couple of hotter derivatives beforehand talked about the M550i xDrive, the M5 and M5 Competitors as lengthy lasting clients of the lineup, moreover the flagship M5 CS available just for the 2022 design 12 months because the model’s only freeway motorcar at any time.

[Source: Car and Driver]