The factory-supported Marc VDS squad claimed a first Spa 24 Hours victory for BMW since 1998 with the Z4 GT3 driven by Nicky Catsburg, Markus Paltalla and Lucas Luhr.
The BMW trio triumphed over the WRT Audi R8 LMS shared by Frank Stippler, Nico Muller and Stephane Ortelli by a lap at the end of a race interrupted by heavy and prolonged rain early on and no fewer than 10 safety-car periods.
The winning Z4 took to the front of the double-points Blancpain Endurance Series race after playing catch-up from earlier delays, the result of the wrong tyre choice in wet conditions and a penalty for a yellow-flag infringement, shortly after the sister car of Maxime Martin, Augusto Farfus Jr and Dirk Werner retired in the 19th hour with transmission failure.
Catsburg moved past Ortelli and pulled 30 seconds on the Audi driver, before the lead was doubled when the R8 stopped under the green flag and the Z4 during a full-course yellow.
The Audi drivers, who went through the race without a change of brake pads and discs, were unable to respond to mount a bid for a second consecutive victory at Spa for the Belgian WRT squad.
Luhr, who together with Paltalla missed out on victory at Spa last year by just seven seconds, said: "After being so close last year, this is really special; it means a lot."
Stippler, who had claimed pole position for the race, explained that the Audi didn't have the pace of the BMW in race conditions.
"The car was good over one lap in Super Pole, but we were struggling a bit over a stint," he said.
The best of Phoenix Racing's new R8s driven by Nicki Thiim, Christopher Mies and Christian Mamerow was two laps in arrears in third position after the Rowe Racing Mercedes-Benz SLS AMG shared by Daniel Juncadella, Stef Dusseldorp and Nico Bastian, which had led the race for much of the night, retired with engine failure in the final hour.
The AF Corse Ferrari squad claimed fourth and the Pro-Am class victory with its 458 Italia shared by Gianmaria Bruni, Alessandro Pier Guidi, Stephane Lemert and Pasin Lathouras after a trouble-free run.
The Ferrari finished five laps down and one ahead of the fifth-placed Phoenix R8 in which Mike Rockenfeller failed in his bid to add overall victory at Spa to his 24-hour triumphs at Le Mans, Daytona and the Nurburgring.
The car that Rockenfeller shared with fellow Le Mans winners Andre Lotterer and Marcel Fassler lost time to repairs on Sunday morning after the last-named spun at Eau Rouge and then a series of penalties for exceeding track limits.
Sixth place and second in Pro-Am went to the AF Ferrari driven by Davide Rigon, Matt Griffin, Duncan Cameron and Francisco Guedes.
The two Barwell-run BMWs claimed third and fourth in Pro-Am with seventh and eighth places, its Ecurie Ecosse-entered car finishing just 21s ahead of its Team Russian entry.
Rene Rast, Laurens Vanthoor and Markus Winkelhock, who were bidding for a Spa double, lost more time in the closing stages with gearbox problems.
The car had led in the early stages before Vanthoor crashed shortly before one-quarter distance. Six laps were lost to repairs, but the car was able to recover to the top 10 and ran as high as eighth before dropping to 21st.
Bentley salvaged ninth place from the weekend with the factory-supported HTP Motorsport Continental GT3 driven by Vincent Abril, Mike Parisy and Harold Primat after the two M-Sport entries retired.
|1||Pro||M.Palttala, N.Catsburg, L.Luhr||BMW Sports Trophy Team Marc VDS||BMW||24h00m53.611s|
|2||Pro||F.Stippler, S.Ortelli, N.Muller||Audi Sport Team WRT||Audi||1 Lap|
|3||Pro||C.Mamerow, C.Mies, N.Thiim||Audi Sport Team Phoenix||Audi||2 Laps|
|4||Pro-Am||S.Lemeret, P.Lathouras, A.P.Guidi, G.Bruni||AF Corse||Ferrari||5 Laps|
|5||Pro||A.Lotterer, M.Fassler, M.Rockenfeller||Audi Sport Team Phoenix||Audi||6 Laps|
|6||Pro-Am||F.Guedes, D.Cameron, M.Griffin, D.Rigon||AF Corse||Ferrari||7 Laps|
|7||Pro-Am||A.McCaig, D.Modell, O.Bryant, A.Sims||Ecurie Ecosse||BMW||9 Laps|
|8||Pro-Am||L.Machitski, J.Minshaw, J.Cocker, P.Keen||Team Russia by Barwell||BMW||9 Laps|
|9||Pro||H.Primat, V.Abril, M.Parisy||Bentley Team HTP||Bentley||9 Laps|
|10||Pro-Am||S.Leonard, M.Meadows, S.Mucke, T.O.-Cole||Leonard Motorsport AMR||Aston Martin||13 Laps|
|11||Pro-Am||A.De Leener, C.Sbirrazzuoli, R.Giammaria, T.Vilander||AF Corse||Ferrari||15 Laps|
|12||Pro||H.Haupt, A.Al Faisal, Y.Buurman||Black Falcon||Mercedes||16 Laps|
|13||Pro||S.Jimenez, F.Fraga, C.Bueno||BMW Sports Trophy Team Brasil||BMW||20 Laps|
|14||Am||B.Simonsen, I.Loggie, J.Westwood, C.MacLeod||Team Parker Racing||Audi||23 Laps|
|15||Pro||K.Chiyo, W.Reip, A.Buncombe||Nissan GT Academy Team RJN||Nissan||23 Laps|
|16||Pro||N.Bastian, S.Dusseldorp, D.Juncadella||Rowe Racing||Mercedes||25 Laps|
|17||Am||J.Haring, D.Konstantinou, F.Schmickler, P.Wlazik||Attempto Racing||Porsche||25 Laps|
|18||Pro||B.Senna, A.Q.-Hobbs, A.Parente||Von Ryan Racing||McLaren||25 Laps|
|19||Am||S.Earle, L.Talbot, M.Zanuttini, M.Rostan||Kessel Racing||Ferrari||26 Laps|
|20||Am||C.Bourret, P.Gibon, P.Polette, J-P.Belloc||Akka ASP Team||Ferrari||26 Laps|
|21||Pro||L.Vanthoor, R.Rast, M.Winkelhock||Audi Sport Team WRT||Audi||28 Laps|
|22||Am||E.Orgeval, P-E.Bordet, A.Viron, P-L.Chatin||Delahaye Racing Team||Porsche||32 Laps|
|23||Am||C.Corten, M.T.Guillot, T.Samon, C.Beroujon||Sport Garage||Ferrari||32 Laps|
|24||Pro-Am||R.Salikhov, M.Seefried, N.Siedler, S.Vancampenh.||Rinaldi Racing||Ferrari||33 Laps|
|25||Pro||A.Zanardi, T.Glock, B.Spengler||ROAL Motorsport||BMW||36 Laps|
|26||Pro-Am||R.Sanchez, G.Paletou, F.Strauss, O.Pla||Nissan GT Academy Team RJN||Nissan||37 Laps|
|27||Pro-Am||L.Frey, G.Gardel, F.Barth, J.Hirschi||Emil Frey Racing||Jaguar||39 Laps|
|28||Pro-Am||G.Vannelet, E.Guibbert, E.Cayrolle, G.Lancieri||Sport Garage||Ferrari||56 Laps|
|29||Pro||S.Gisbergen, R.Bell, K.Estre||Von Ryan Racing||McLaren||79 Laps|
|30||Pro-Am||A.Al Harthy, D.Lloyd, J.Adam, J.Venter||Oman Racing Team||Aston Martin||92 Laps|
|31||Pro||M.Martin, A.Farfus, D.Werner||BMW Sports Trophy Team Marc VDS||BMW||137 Laps|
|32||Am||A.Moiseev, G.Kondakov, R.Ragazzi, R.Aguas||AF Corse||Ferrari||139 Laps|
|-||Pro||G.Venturini, A.Zaugg, M.Bortolotti||GRT Grasser Racing Team||Lamborghini||Retirement|
|-||Am||M.Blanchemain, G.Lallement, P.Haezebrouck, B.Caccia||Sainteloc||Audi||Retirement|
|-||Pro-Am||E.Dermont, H.Hassid, F.Perera, M.Beche||TDS Racing||BMW||Retirement|
|-||Pro-Am||A.Vasiliev, M.Asmer, I.Dontje, L.Plato||GT Russian Team||Mercedes||Retirement|
|-||Am||J-L.Blanchemain, P.Hirschi, C.Kelders, F.Bouvy||Classic & Modern Racing||BMW||Retirement|
|-||Pro-Am||H.Hedman, R.Dalziel, E.Julian, A.Lazzaro||DragonSpeed||Ferrari||Retirement|
|-||Pro||M.Buhk, M.Soulet, A.Soucek||Bentley Team M-Sport||Bentley||Retirement|
|-||Pro-Am||O.Morley, S.Johnston, M.Engel, B.Schneider||Black Falcon||Mercedes||Retirement|
|-||Pro-Am||M.Rasmussen, D.Andersen, M.Jensen||Insight Racing Denmark||Ferrari||Retirement|
|-||Pro||G.Guilvert, E.Sandstrom, M.Basseng||Sainteloc||Audi||Retirement|
|-||Pro||R.Frijns, J-K.Vernay, S.Richelmi||Belgian Audi Club Team WRT||Audi||Retirement|
|-||Pro-Am||M.Koebolt, S.Bottemanne, P.Schothorst, J.Nash||Team WRT||Audi||Retirement|
|-||Pro-Am||M.van Splunteren, F.Hamprecht, L.Machiels, C.Schmid||Bentley Team HTP||Bentley||Retirement|
|-||Pro||A.Palmer, F.Babini, J.Mul||GRT Grasser Racing Team||Lamborghini||Retirement|
|-||Pro||G.Smith, A.Meyrick, S.Kane||Bentley Team M-Sport||Bentley||Retirement|
|-||Pro||N.Verdonck, A.Christodoulou, A.Simonsen||Black Falcon||Mercedes||Retirement|
|-||Pro-Am||M.Broniszewski, A.Bonacini, M.Lyons, A.Piccini||Kessel Racing||Ferrari||Retirement|
|-||Pro-Am||J.Osborne, R.Ratcliffe, L.Mowle, D.Muller||Triple Eight Racing||BMW||Retirement|
|-||Pro||F.Salaquarda, M.Bonanomi, F.Vervisch||ISR||Audi||Retirement|
|-||Pro-Am||A.Karachev, K.Heyer, M.Toril||GT Russian Team||Mercedes||Retirement|
|-||Pro-Am||P.Witmeur, J-M.Martin, E.van de Poele, M.Duez||BMW Racing Against Cancer||BMW||Not classified|
|-||Pro||S.Walkinshaw, M.Plowman, C.Dolby||MRS GT Racing||Nissan||Retirement|
|-||Pro-Am||P.Perazzini, M.Cioci, E.Potolicchio, M.Rugolo||AF Corse||Ferrari||Retirement|
|-||Am||J.Grogor, K.Ojjeh, O.Grotz, W.Hamprecht||Boutsen Ginion Racing||BMW||Retirement|
|-||Am||G.Duqueine, R.Brandela, B.Delhez, E.Clement||Duqueine Engineering||Ferrari||Retirement|