The escalating costs of the Super Touring formula through the late 1990s had driven manufacturers away from the series and reduced independent entries to an all-time low. TOCA had begun exploring a successor formula in 1999, and in June 2000 BMP announced plans built around simplified aerodynamics, standardised components including brakes, wheels, gearbox, and differential, and reduced reliance on expensive carbon fibre. Initially limited to front-wheel-drive cars, the regulations were later amended to permit rear-wheel-drive entries.
For 2001, the grid was divided into two classes: BTC-Touring for the new-specification cars and BTC-Production for Super Production-based cars that had previously contested the BTCC's Class B category. Control tyres shifted from Michelin to BF Goodrich. Both classes ran their own separate points systems with separate championships.
The race format was restructured around three races per weekend — two sprint races, one per class, followed by a combined feature race. The BTC-Touring class was required to make a mandatory two-tyre stop in the feature race between fifteen and seventy-five percent race distance. The BTC-Production cars were not required to stop, instead being given a time-delayed rolling start in the combined race to allow the faster touring cars to unlap themselves, creating an unusual racing dynamic. Due to low BTC-Touring grid numbers at the opening round — only eight cars qualified — the sprint races were combined for the remainder of the season. The two-class format was widely seen as unnecessarily complex by casual viewers and was abandoned for 2002. Additional changes included the return of conventional qualifying sessions replacing the one-lap showdown system used previously, and the first BTCC race held outside the United Kingdom, at Mondello Park in Ireland.
Vauxhall was the only manufacturer ready with a new-regulation car from the start of the season, fielding four new Astra Coupes built and run by Triple 8 Racing. Jason Plato and Yvan Muller raced under the Vauxhall Motorsport banner, while James Thompson and Phil Bennett drove in Egg Sport livery as the third and fourth entries. Andy Priaulx substituted for Bennett at one round following Bennett's race ban after multiple incidents at Croft.
Peugeot re-entered the BTCC with three Vic Lee Racing-prepared 406 Coupes, though the team's efforts were complicated by driver changes throughout the season. Matt Neal left after the opening round for the European Touring Car Championship. Dan Eaves and Steve Soper filled out the remaining seats.
MG made development appearances late in the season with West Surrey Racing-prepared ZS models driven by Anthony Reid and Warren Hughes, in preparation for a full 2002 campaign. JSM entered a pair of Alfa Romeo 147s headlined by 1992 BTCC champion Tim Harvey in a combined driver-team manager role. ABG Motorsport entered a Lexus IS200 for Kurt Luby, later taken over by Thomas Erdos mid-season when the team's running passed to Total Motorsport.
Honda and Ford were absent, having withdrawn from the series. The Production class grid was bolstered by multiple Peugeot 306, Honda Accord, and Ford Focus entries from smaller teams, providing the grid numbers the BTC-Touring class could not alone supply.
The season's defining narrative was the battle between Vauxhall teammates Plato and Muller. Both drivers competed in the same machinery under the same team roof, yet fought each other intensely across the calendar. Their intra-team contest gave the championship a clear storyline and demonstrated the competitiveness of Vauxhall's new-generation touring car against a field that was still transitioning to the new rules.
The 2001 season was a necessary but imperfect transition year. The dual-class format produced logistical and presentational complications, and the limited BTC-Touring grid exposed how few teams had managed to build compliant cars in time. However, the new lower-cost regulations achieved their core purpose: by 2002, MG and Honda had returned with full campaigns, the grid expanded, and the BTCC began a recovery in both manufacturer involvement and spectator appeal that would sustain the series through the following decade. The 2001 season is remembered as the year British touring car racing hit reset — trading prestige for accessibility in the hope of a more competitive and sustainable future.