I bought a NSX that was originally a USA car, but was converted to KPH when it was imported into Canada. Can someone tell me the process for converting the car back to MPH. Also since the odometer is now in KM won't I have to take it to a special place to have this done?
I understand the speedometer change only involves changing the speedo face from km to miles as the needle position doesn't change, it's the numbers underneath the needle that are different.
The odometer and odometer trip modules look to be the two electro/mechanical parts to be changed in a conversion.
As you need to take the whole guage cluster out to do the speedo face anyway changing the modules should be reasonably straightforward.
What I'm not certain about is how you change the odometer numbers from a mileage number to a km number or vice versa.
If I were doing this I'd talk to the service manger at my local dealer and have him note the km or mileage reading on the car and tell him I was next going to remove the guage cluster myself.
I think the service manager knows it's a very labour intensive project to do this and would understand you doing it yourself to save significant dollars.
After removal, I'd bring the cluster with the two different used odometer modules (it looks like new parts are discontinued) back to the service manager and ask him to change the reading on the odometer to the correct new km or mileage numbers, install the modules in the cluster, and record the change with some jpegs and a letter.
I'd then reinstall the guage cluster back home.
Now you should have a location correct speedo/odometer and a dealer certified odometer change to keep the provenance of the car intact.
