Were you, like us, just thinking that BMW’s U.S. auto transport lineup would be fully complete if only it had just one more crossover utility Sports Activity Vehicle that slotted in somewhere between the small X3 and midsize X5? If so, we have good news. Just such a vehicle – logically and tentatively named the X4 – is rumored to be in development. Again.

Just as the X6 was designed as a sportier take on the more traditional SUV-shaped X5, the new X4 would inject a bit more Bavarian flavor into the plain ol’ X3. Citing an unnamed source within the company, Autocar reports, “We haven’t made any firm decision… however, the X6′s success shows there is a continued demand for sporty off-roaders.”

Yes, we’ve heard this rumor before, but not since 2008. Why the possible change of heart? Despite drawing ire from what seems to be a vocal minority, BMW reports that the X6 is handily outpacing its own initial sales projections. In fact, it’s 80,000 sales worldwide is twice what the automaker had expected to sell. And one good turn deserves… something.