Die Roten coach will hope to beat the Belarusian champions to secure top spot in Group F, but will be wary after his side suffered a shock defeat to their opponents on matchday two
Die Roten have already qualified for the knockout stages but are currently level on points with Valencia, meaning a win could be essential if they are to go through as group winners.
BATE, meanwhile, are guaranteed to finish third regardless of Wednesday's result, and so will take up a place in the Europa League.
"BATE are a really good team - strong technically and physically competitive - so it won't be a kickabout," Heynckes told reporters.
"We saw during our first meeting how good they are and, to be honest, they deserved that win. They played a really great game. They ran 128 kilometres in that game - that is a great performance. We only ran 120.
"Sometimes teams like BATE are underestimated. Unfortunately, we did that in Belarus."
The 67-year-old also gave a clue as to his possible team selection for the clash.
"Mario Gomez is an option to start," said the former Borussia Monchengladbach striker. "He has been playing well again, even though his rhythm is not yet 100 per cent.
"But I have a lot of good strikers, so I will decide who will play just before the game. As the team are working well, we are all very happy.
"The team are very close-knit. The team ethic prevails, and we want that to continue."