Pedzisa mutsara unotevera: Nokuda kwemwaka wa1986, Murray akagadzira chassis yeBT55 ine mutsetse wakaderera, chinangwa chayo chaiva chokuderedza zvikuru kukweva kwemota uye kuderedza nzvimbo yayo yokurema. BMW yakabudisa M12/13/1 injini, iyo yakanga yakatenderedzwa kumativi kuti ikwane munzvimbo yakaderedzwa yakagoverwa injini. Pasinei zvapo nepfungwa dzayo dzakanaka, BT55 yakaratidza kuti yakanga isingakwanisi kukwikwidzana, ichitambura nekusagadzikana kwakashata uye kukundikana kwakawanda kwemagetsi kunokonzerwa nezvinetso zvekuchenesa mafuta muinjini yakatenderedzwa. Uyezve, chikwata chakatambura rufu rwaElio de Angelis mutsaona yekuyedza mushure memakwikwi mana; mutsivi wake Derek Warwick uye timu inodzoka Patrese vakawana mapoinzi maviri pakati pavo mwaka wese. Chikwata cheArrows chakadzokerawo shure, chichiwana poindi imwe chete naBoutsen, Surer naChristian Danner, uye zvakare vakarasikirwa nemabasa aSurer pakati pemwaka apo mutyairi weSwitzerland akakuvara zvakanyanya mutsaona yemusangano. Kubudirira kukuru kweBMW muna 1986 nokudaro kwakanga kuri nechikwata chitsva cheBenetton, icho chakawana 19 mapoinzi, chakakunda mujaho weChirungu weChirungu weChirungu weChirungu weChirungu, uye chakakunda mujaho weChirungu weChirungu weChirungu.
MuMexico Grand Prix uye akatora nzvimbo mbiri dzakakwirira naBerger naTeo Fabi. Arrows naBenetton vakaramba vachishandisa iyo yekutanga "yakamira" vhezheni yeM12/13 injini.