Half way through 1993 Toyota and Kankkunen bought Grist's contract and he moved to the Toyota team full-time competing in the Celica GT4 ST185. The season began well with a second in Monte Carlo and a win in Portugal, but during the Safari Rally, crashed at 180 km/h after hitting a pothole that had formed due to the rain. By mid season Grist and Kankkunen were tied at the top of the points with Carlos Sainz, but after mechanical problems and the a crash in Finland put them 20 minutes behind and they finished the WRC in 3rd position. In 1995, with only two rallies to go, Kankkunen and Grist started the Rally Catalunya in a comfortable lead, seven points ahead of Colin McRae and the 555 Subaru World Rally Team, when they crashed and had to retire. After the Rally Catalunya, Toyota were found guilty of the implementation of illegal turbo restrictor bypasses on their ST205 cars. The team was given a 12-month ban by the FIA. In 1996, Grist competed with Kankkunen for private Toyota teams in three events and finished fourth in Sweden, third in Indonesia and second in Finland.