fast Mileage counter

Hello
I had a Passat (1.9TDI 98MY) for a bit more then a month and I already had airbag, problem, service light (Fixed now), but I see something strange, the mileage get slow and then get faster, I went the weekend to try it and surprise, I have done about 39 or 40 miles, but the clock went nearly 90 miles, has someone had that problem?, how can I fix it, if a carry on like that I will be doing more then double mile., wheel size is standard, I don’t know what is that?

Hello
I had a Passat (1.9TDI 98MY) for a bit more then a month and I already had airbag, problem, service light (Fixed now), but I see something strange, the mileage get slow and then get faster, I went the weekend to try it and surprise, I have done about 39 or 40 miles, but the clock went nearly 90 miles, has someone had that problem?, how can I fix it, if a carry on like that I will be doing more then double mile., wheel size is standard, I don’t know what is that?

I'm not being a smart ass but are you sure its counting miles and not kilometers? If not that, I'm not sure what the problem could be.

It counting miles of course, and for no reason it went mad, so now I don’t know what to do, if I touch it I can make it worse, I don’t know it there is a way to recover the real mileage, does someone know how to do that?

Thanks in advance.

I wasn't being a smartass, I asked because the TDI engine wasn't offered for the Passat except in Europe until 2004.5MY so it stood to reason that the computer was set for km not mile. Sorry I couldn't help more.