tunning Vs not tunning
 

Hello

Before bying my new x5 I Would like someone to tell me the pros and cons of having the x5 tunned


thanks a lot

Tuning, you mean?

Which model and which engine?

35d M sport

Simply...
Pros: more HP more TQ and possibly better gas mileage, however, the add'l HP and TQ may have you on the throttle more. That's why is say possibly on the mpg.
Cons: if you have an issue and the car has stored codes, you may lose your warranty. Codes can be cleared of you have the right tools, however.

Even if you clear codes, they can detect operating parameters outside the normal range and can deny warranty coverage.

The safest bet it to accept the possibility that you will pay the bill if the motor or tranny takes a dump and BMW gets wind. I'd be OK with the risk after you had 20k and a year on the car.

thanks a lot!

the car has already 30k miles.....and it has been tunned the last 2 months....

Someone told me that by tunning any car you may have an issue with the axle...is that true?

Tuned cars are usually abused............ Otherwise why would you tune in the first place?

There is NO DOUBT that if you use the tuning- accelerate hard, allow the transmission to shift at full throttle, etc- you WILL increase driveline wear and you WILL increase the risk of a failure.

But this is the price you pay when you up the power on ANYTHING.



Enjoy

A

Are you implying that in my stock 4.8i, I shouldn't let the transmission shift at full throttle and that I should let off the gas, as if it was equipped with a manual transmission?

"should" or "shouldn't", I will not say.

But I can tell you that a car driven hard and shifted at full throttle repeatedly will NOT last as long as one driven by my wife.

Just the nature of these things.

If you will be trading the car it, if you have a warranty, if you don't care about maybe paying a large repair bill, just thrash it. But letting the tranny shift without load, not being at full throttle, will lead to longer transmission life. If this is 100k, or 200k, I cannot venture a guess- we've seen failures in plenty of X53s as I recall.... has BMW made new trannies that are immune to failure? Probably not.

So nobody can make lifetime predictions- but I think most can agree that driving more energy into a tranny will lead to accelerated wear. The only thing left to bicker about is the rate of this accelaration and if we will experience this during our ownerships.

IMO., of course.