Sauber team principal Monisha Kaltenborn says Red Bull should "live with" whatever engine they are given for 2016.
Red Bull is still without an engine supply for next season, with Mercedes and Ferrari both refusing to give the world champions up-to-date engines. Red Bull was originally offered a 2015 Ferrari power unit for next year but insisted it would quit the sport if not given engine parity, though a recent tweak to the regulations will prevent customer teams being given year-old engines next season.
Red Bull's options now seem limited to a return to Renault power despite the pair's spectacular fall-out this season, though talk of luring an independent manufacturer such as Cosworth back to Formula One continues. Kaltenborn says Sauber has always taken what it's been given as a customer team and suggests Red Bull should do the same.
"We have had a long history with them because we got them into the sport and had 10 years cooperation," Kaltenborn said on Sky Sports. "But if you look at the last few years, they have really been getting away with so much which is not in agreement with the others, to answer the question, I think they have to live with what they get now. We've done that for so many years so why can't they now?"
Before becoming its own team, Red Bull was the main sponsor of the Sauber team. However company owner Dietrich Mateschitz sold its majority share when Peter Sauber promoted Kimi Raikkonen to a race seat in 2001 instead of Red Bull-backed driver Enrique Bernoldi.
Kaltenborn says the relationship between Sauber and Red Bull remained good when the latter became a team in 2005 but has soured since the Milton Keynes outfit started to enjoy its dominant success in the early 2010s.
"It used to be better earlier when we were partners and even when Red Bull initially became a known team. They have changed a lot, maybe success has made them change that much, but I would say communication is not that high."