The F10-generation BMW 5 Series arrived here in the United States for the 2011 model year, and the only substantial update thus far has been the addition of the 2.0-liter turbocharged four-cylinder engine to the base 528i model for 2012. But as we can now see in these latest spy shots, a small nip/tuck is on tap for BMW's midsize executive saloon, meaning slight tweaks to the front and rear fascias will be offered as part of the model's mid-cycle refresh.

As is the case with the vast majority of new BMW models, the updated 5 Series will use the more squared-off LED Angel Eyes seen on the 6 Series and 7 Series, with other elements of the sedan's front end being touched-up, as well. It's hard to tell exactly what lies under the swirly paper, but we expect more stylized headlamp clusters (like those seen on the 2013 7 Series) to make their way onto the Fiver. Additionally, the lower air intakes appear to be more pronounced and aggressive than the svelte design found on the current car. Out back, it looks like the taillamps are also receiving a slight makeover, though the overall shape isn't changing too much from what's offered right now.

Mum's the word on any powertrain enhancements for the refreshed 5 Series, but we don't expect BMW to stray from its current engine lineup here in the US. That means the 2.0-liter turbo-four will likely start things off at the low end, with the 3.0-liter turbo six and 4.4-liter twin-turbo V8 rounding out the 535i and 550i models, respectively.

As for when the new 5 Series will debut, your guess is as good as ours, but since this is only a mild enhancement, we'd expect the changes to arrive sometime in 2013 for the 2014 model year.