Nissan won't do bannanas as I've already tried. They say they'll only correct if more than 10% difference.

I also read somewhere that it's incorrect on purpose so we have to service our cars sooner.
I dunno how that would work though...

It's because the car travels less distance and speed than indicated.

Am I the only geek who studied physics? I am bored at work, so here goes my explaination.



Imagine the entire road surface of the wheel as distance measurement of approximately 2m. (circumference)

The ECU is constantly counting how many times the wheel rotates and how many times per second this occurs via the ABS wheel sensors (or gearbox on some cars)

The ECU then multiplies the distance by the number of times and gets the total distance travelled. It can also calculate speed based on the number of rotations per second/minute/hour

Here's the problem....the ECU has a distance measurement for the wheels that it uses for all calculations. This figure is the innacurate part and is a bit longer than actual wheel circumference.

Ahhh.. Now i feel stupid!

I thought it was magic!!

It's ok Ronnie, he got his facts wrong:

Lets say for instance you are cruising at 100kph, if you, at any given time, lift up the storage compartments in the back (behind both driver and passenger seats) and unscrew the panel, you'll find what is causing the speedo to go out...... leprechauns.. two of them.. they actually sit in there and screw up the signals being sent to the ecu. I find the best solution is to leave cheese outside the car, when it's dark they'll jump out to feed, thats when you hit them with a shovel. Sell em on ebay for some quick cash, good for a sway bar.

:icon18:

The outside circumference of the tyres will progressively reduce as you wear down the tread pattern.

Thus, the more you drive the slower you go, ergo , one day you'll be doing "60kmph" down the road and wondering why grandpa in his motorised wheelchair is racing you off at the lights and beating you! ;-)

G

Anyone know how the odometer works? Off the gearbox or ECU or? If it suffers from the same source of inaccuracies then I would really be cheesed off. The speedo is one thing, but if you are up to 10% out on the odometer I think that could be serious.

Imagine all those crimes where the cops calulate how far it was to get to the murder scene and back in time, the odometer could be kilometres out and so you get off scott free!

G

I remember when the '03 350Z came out, it had all kindsa bugs; then the '04 had fewer; then the '04.5, my year model--Touring Coupe--had most of 'em corrected (my beaZt's very reliable!). Then, in the '06 model, there was the oil-consumption issue, but the years following were great. Now comes the 370, starting the process all over! What's wrong with Nissan's engineers?! Nissan was classified as a "hit'n'miss" car manufacturer by CR. I think they really know what they're talking about!

WTF?
Nissan engineers are fine, you cannot account for over 10k US sold vehicles plus however many more worldwide and expect a perfect vehicle. This is not a hand built car, even some of those have minor issues. Also, you are on a website dedicated to the car, with maybe 1% of owners here who even remote issues, there are bound to be problems with any car. I can bet you anything that your perfect model year 2004.5 350z has issues with some customers.

Get off your high horse and start thinking, this forum is for the 370z, not the 2004.5 350z is great without issues.

2004.5 > all? i'm lost

:shakes head:

something about this post makes me want to shake babies!

if i [accidently] have one, you can shake it all you want :ugh2:

"Full" guage.... I think you mean FUEL guage. All my lights light up when I fill it right up.

Boot.... others have had this problem... me, nothing... never had any problems with the hatch (boot).

Side mirrors...? That's a weird one... never happened to me.

My 2 cents.