Audi is facing a race against time to ready its fleet of R18 e-tron quattros for the next round of the World Endurance Championship at Spa on May 3.
The two R18s entered in last weekend's opening round of the WEC at Silverstone both sustained chassis damage in the accidents that put them out of the race.
Audi is also having to ready the additional car it will run in Belgium, to be driven by Oliver Jarvis, Marco Bonanomi and Filipe Albuquerque, in preparation for its three-car assault on the Le Mans 24 Hours in June.
Audi Sport boss Wolfgang Ullrich said: "Both tubs are damaged to the extent that they will have to be sent away to be repaired and it is unlikely that we will get them back in time.
"So we will have to find another solution. It will be a close cut."
The solution could involve using the chassis from its test cars, of which Audi is known to have at least two.
Front suspension pick-up points were damaged on both cars, which were crashed by Lucas di Grassi in the opening hour and by Benoit Treluyer just after the halfway mark at Silverstone on Sunday.