The Toyota TF101 was a Formula One car used solely for testing purposes during the 2001 season, in preparation for the team's full-scale assault on the series in 2002.

The car was designed by Toyota F1's chief of chassis Jean-Claude Martens and was driven by Mika Salo and Allan McNish.

The car was designed and built from the ground up by the staff at Toyota Motorsports GmbH (TMG) in Cologne, Germany over a period of nineteen months, in preparation for Toyota's entry to Formula One in 2002.

After the initial unveiling of the car, the test team, including drivers Mika Salo and Allan McNish took on an intensive testing programme, accumulating a total of 3,000 laps and 22,967 km at eleven F1 circuits around the world, and also the specialist testing facility at Paul Ricard in Southern France.

The car was handling poorly and being overweight, Mika Salo described it as being "a piece of shit".