Bavaria's styling department is working on a minor refresh for the 4 Series Coupe that only hardcore BMW fans will notice.

Almost a month ago, we spotted a lightly masked prototype of the 4 Series Gran Coupe and now our spy photographers have caught on camera the version without rear doors. As it’s the case with the GC, this one too is wearing minor camouflage to hide what will likely be very subtle changes. BMW is smart enough not to make any significant changes since the 4 Series Coupe is already a pretty car, so why mess around with its design?

Those dual exhaust tips could indicate we’re looking at the 440i Coupe, but you can never be too sure with these prototypes. You can imagine the mid-cycle refresh being prepared for the 4 Series in both coupe versions and cabrio guise will bring the models in line with the Life Cycle Impulse implemented last year in the 3 Series Sedan. Some of the changes are already in place thanks to the latest model year, so we are not expecting a lot of updates on BMW’s part. The 3 Series Sedan received a three-cylinder engine with the facelift, but it’s unclear at this point whether the turbo 1.5-liter rated at 136 hp (100 kW) will also power the models from the 4 Series family.

Taking into account the changes are modest at best, BMW probably won’t wait too long to introduce the revised 4 Series lineup, even though it feels as if the cars came out just a short while ago. We remind you the regular 4 Series Coupe was unveiled in June 2013 and was followed later the same year in October by the Convertible and in February 2014 by the 4 Series Gran Coupe, arguably one of the prettiest BMWs on sale today.

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