The concept of the PBMWC was drawn up by a group of Lotus Enthusiasts who enjoyed the circuit time offered at track days. They wanted a low cost viable alternative to racing their Lotus cars, whilst still maintaining the fun and excitement. A car was required that would be popular, cheap to purchase, robust, easy to maintain and most importantly be rear wheel drive. The BMW e30 3 series was seen as the obvious choice. To keep the field as competitive as possible, it was decided to limit the drivers to the 318i(1.8 litre 4 cylinder) and 320i (2.0 litre 6 cylinder) variants.
2004 saw the first cars roll onto the track with sufficient numbers to warrant their own grid at the SEMSEC events held predominantly at Lydden Hill. In these early days, Easytrack were the title sponsor. As the season progressed, interest increased with more cars being prepared. The first touring joined the group alongside the more popular 2 and 4 door cars. What started off as a bit of fun between friends was rapidly gathering interest from other parties.
2005 marked a turning point for the PBMWC, joining forces with BARC increased their profile still further. With a different circuit for each race, driver skill was being pushed harder. Racing alongside other well-known championships led to further visibility and publicity.