The special BMW sale took place at BCA Brighouse late in December and a total of 300 cars were offered from BMW.
The sale featured a selection ranging from Mini One to BMW 7-series and also included new M3 and M5 models.
Nearly 70 BMW dealers attended the sale, with 51 buying on the day. A further 16 dealers logged on to bid using BCA’s live online system.
The sale achieved a 100% conversion, totalling £9.5 million, setting a new UK auction turnover record for a single vendor sale and an average sale price record of just under £31,600.
The sale achieved the equivalent of 107.5% of CAP Clean across the board, with individual vehicles achieving up to 124% of CAP. The highest individual value on the day was £65,400 realised by a 07-registered BMW M6 SMG Coupe.
Live online buyers bid on 46% of the cars, buying 14% (41 cars) and adding over £25,000 to the value of the sale.
The previous record – also established by BMW, but in 2006 – was £8.2 million.
Nigel Smith, BMW auction manager, said: "The strong attendance from our dealer network and the confident bidding throughout the sale underlines the desirability of the BMW range.
"The cars are certainly shown to their best advantage thanks to the first class presentation by BCA and the added buying power generated by Live Online was instrumental in achieving this record-breaking result."