“The differential for the Yaris Gr does not fit in the rear differential housing, you have to modify the differential housing or modify the differential itself and lose the warranty, which results in unbudgeted additional costs for installation and correct operation in either case. The most serious thing is that the company in the USA knew about this as they sent me a solution from one of their customers (even though it was incorrect) but they continue to sell it as plug and play for the Yaris Gr without solving the problem! No one has been willing to refund or at least help with the installation costs incurred to solve the problem. Of course, I didn't ask because I knew I would have been refused.”