I m buying a Vauxhall vivaro and have been told that the speedo doesn t work as it s a 2002 model and gearbox been replaced from a 2007 mode?

Other answer:

The car is illegal to drive.
Walk away. Quickly.
A 2002 speedo.uses a drive cable.
A 2007 speedo uses an electric pickup.
The two are incompatible.
The car is illegal.
Timbo is here:
The speedometer picks up its signal from a sensor on/in the gearbox so suspect that this has not been dealt with properly
You are buying a non roadworthy vehicle then. Be sure you can fix it. Be wary as if it were a simple fix the seller would have done it already.
Can anybody help clarify is this true please