"Faulty" build in speedos ?

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megatniza

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Yo bros , Stumble on this tread while browing yahoo . Hmm... interesting . All the while I thought a beemer is so well build that 180 km / hr feels like 110 km / hr - LOL . :rolleyes: Quote ------------------------- Hi. I heard from a variety of BMW fans and experts that BMW makes the worst speedometers possible. I find that to be true with my bmw also. For example, whenever, It shows 80mph, i don't feel like going 80, because, well, I see many semi trucks going even faster than me. It feels more like 70 mph. My uncle, who is a truck driver drove my BMW and he even told me that the speedometer isn't accurate. Now, many people said that BMW just can't build good speedometers, they are not good at that. According to a website BMW allows their vehicles with a speedometer margin of error of 5-7% plus 3 mph out of the factory. If you do the math, while the speedometer tells you you're traveling at 80 mph, you're actually going about 71-73 mph. And that is Acceptable by BMW. Its strange, cause even a Dodge Neon has way more accurate speedometers. I'm gonna test mine on the freeway with a stopwatch and watching those mile markers.by bizlar20... Member since: April 16, 2006 Total points: 3297 (Level 4) Best Answer - Chosen by AskerHere's the real answer why it is like that....When you use your on board computer and reset the average speed while using cruise control it will say you are going faster on the gauge than the computer says. The car knows EXACTLY how fast it is going... where is what people do not consider... in Germany where BMW is made, the fines for having an inaccurate speedometer that needs to be recalibrated (a simple way to get out of a speeding ticket in the US), comes with a higher fine than a speeding ticket. If you get a ticket for 80 in Germany and your speedometer said 75, your equipment is faulty. BMW purposely sets the speedometer to say you are going faster than you really are so that if you get a speeding ticket, it most certainly won't because of the speedometer saying you are going slower. The speedometer is EXACTLY accurate and does EXACTLY what BMW intended it to do.TA-DA! Learn something new everyday. --------------------------------------------------------------------------- Unquote
 
I think that is quite true. Was travelling at 120 Kph but my friend gps say only 114 kph.
 
Who looks at speedometer anyway :p
Foot flat on the floor still the same
Thats probably BMW's thinking also
:p
 
Mine over-reads by about 5km/h... 120km/h on speedo is about 115km/h only, acceptable. I think all car manufacturers make their speedos over-read a little, unless of course you change to a wrong tyre size...
 
LCP;275666 said:
Mine over-reads by about 5km/h... 120km/h on speedo is about 115km/h only, acceptable. I think all car manufacturers make their speedos over-read a little, unless of course you change to a wrong tyre size...
over read is better than under-read, imagine if we r actually driving at 115km/h but your speedo is only telling 110km/h, its more dangerous because we have tendency to floor is more without actually knowing we have exceeded the speed limit
 
Its true, I've enquired about this before in here (maybe in the old forums).

I tested against my GPS and the speed is about 5kmj slower than what is said on the speedo. Then again, who looks at the speedo? I thought we only look at the rpm..
 
yup...mine is also have 5km/h ahead the current speed...my the obc is accurate on how fast i go...
 
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