Just last week, we were treated to our best look yet at the new BMW M3's design details, revealing it will have a larger grille than its predecessor. And now we've been given a first look inside the performance sedan's overhauled interior thanks to these latest spy shots.

Unsurprisingly, the cabin is heavily inspired by the 3-Series and appears to feature a 12.3-inch digital instrument cluster with M-specific displays. This is also the same display BMW recently showed off in the new M8, so it seems likely the 2020 M3 will include BMW's new M Mode selector.

Elsewhere, the prototype has been equipped with Aluminum Tetragon trim, a three-spoke M steering wheel, and an 8.8-inch infotainment system. An optional 10.25-inch display should also be optional. The center console and gear selector have been covered up, so they could also receive some M-specific updates. This prototype appears to have an automatic transmission, but a manual option is also expected to be offered to keep enthusiasts happy.

While the previous M3 prototype was spotted loaded on a transporter, this one was photographed while stopping for fuel near the Nurburgring. Once again, the prototype is sporting a unique front bumper, five-spoke alloy wheels a high-performance braking system with gold calipers. A rear spoiler and quad exhaust system reaffirm this isn't a standard 3 Series.

According to reports, the new BMW M3 will pack a twin-turbo 3.0-liter six-cylinder engine offered in three states of tune. A "Pure" model will reportedly have a manual transmission, rear-wheel drive, and an output of 444 horsepower to match the outgoing M3 Competition, while a "base version" will allegedly increase the output to 475 hp and come with an automatic transmission and AWD. The range-topping Competition model, on the other hand, is expected to produce 500 hp and only be available with an automatic transmission sending power to all four wheels.

The next-generation BMW M3 is expected to make its world debut at the 2019 Frankfurt Auto Show in September, but it will likely be revealed as a concept since production isn't expected to start until 2020 before sales reportedly kick off in the second half of next year.