He was a protégé of Finnish 1982 Formula One World Champion Keke Rosberg, who first suggested that Jyrki Järvilehto should abbreviate his name to the more manageable JJ Lehto.

Lehto, marked by many as a star of the future, was paired with Gregor Foitek but financial difficulties hampered his season, leading to the team's withdrawal after the Hungarian Grand Prix (one of five events the Finn failed to qualify for – though he had been hindered by the team's poor preparation, including a driveshaft being fitted the wrong way around for several meetings, and favouritism towards Foitek, whose father was involved with the buyout).

For 1991 he was signed by the ambitious Scuderia Italia team, financed by Beppe Lucchini with a Dallara chassis, Judd V10 engines and Emanuele Pirro in the second car.

Despite running 3rd in Spain before an engine failure and scoring a point in Canada (after the disqualification of Christian Fittipaldi) it was clear his injuries had not healed fully and he was replaced once again by Verstappen for the French Grand Prix.

He returned to the cockpit for the Italian and Portuguese rounds in place of the suspended Schumacher but did not impress and was released entirely soon afterwards when the team signed Johnny Herbert.

This freed him up to drive in the last two rounds for Sauber – Wendlinger's injuries from an accident in practice before the 1994 Monaco GP had failed to heal and his previous replacement Andrea de Cesaris was unreachable.

After his Formula One career stalled, and advised by his manager Keke Rosberg, Lehto joined the German Touring Car Championship, DTM, in 1995 and 1996.

He was a late addition to the 1995 edition of the 24 Hours of Le Mans in a McLaren F1 GTR, but he won the race outright, at his third attempt, sharing the car with Yannick Dalmas and Masanori Sekiya.

[3] He had three more guest appearances in the same car the next year, winning another race, before he got picked up by BMW to join the factory squad in the inaugural FIA GT season, partnering Steve Soper.

Even though success came initially easily, including a win in front of his home crowd at the Thunder In Helsinki event, the might of Mercedes-Benz caught up with the McLarens and left Lehto conceding the title to former DTM rival Bernd Schneider.

He found the M3 already not fast enough to his liking, so it was not surprising when Lehto turned down BMW's offer to join them in the European Touring Car Championship (ETCC) the following year, having to race a near standard 320i tin-top racer.

Cadillac's mother company General Motors pulled the plug on the project, leaving Lehto again without a job if it had not been for Champion Racing, who offered him a drive in their Audi R8.

Lehto won four times in 2003 (including the prestigious Petit Le Mans event at Road Atlanta), but it was not until the factory Audi squad left the ALMS series that he was finally able to reap full rewards in 2004 and score his first championship success since his 1988 title in the British Formula Three, picking up six victories on the way.

[9] On 14 December 2011, the District Court found Lehto guilty of drunk sailing and negligent homicide, and sentenced him to two years and four months in prison.