Boardman returned to the WTCC in 2012, driving for his own Special Tuning Racing team in a 1,600 cc (98 cu in) turbocharged SEAT León Mk2; the team's engines were supplied by SEAT Sport. Due to a shortage of parts, Boardman was forced to miss the first event of the season, the Race of Italy. With a shortage of new SEAT 1.6-litre turbo engines, STR elected to install the 2.0-litre TDI engine in Boardman's car until a new unit was available and he took part in the Race of Spain. Boardman finally switched to the turbo engine at the Race of Portugal. At the Race of China, he finished ninth in the race one provisional classification but along with four other drivers was issued with a 30-second penalty after the race, for missing a chicane to avoid a pileup. A late season improvement in form, including a double points finish at Macau, saw Boardman finish 17th in the drivers' standings.