BMW’s Z4 roadster is soon to be replaced by an-all new model that’s due to be revealed later this month at the Pebble Beach Concours d’Elegance. However, an Instagram user has rained on BMW’s parade by leaking these grainy images (we’re not quite sure how he managed to procure the images) ahead of the unveiling.

The pics show the front, rear and side of the imminent next-gen Z4, and it’s evident the newcomer has adopted edgier design language than the existing E89 model. The long-snout/short-rump proportions have been carried through, but everything else is different about the new model.

Naturally, the trademark twin-kidney grille dominates the front fascia, and beneath this is a trio of aggressively sculpted air intakes. Swept-back headlights complete the picture, making for a purposeful visage.

As reported previously, the next-gen Z4 shares its platform and much of its hardware with the upcoming reborn Toyota Supra, but it’s believed the German roadster will serve up very different driving dynamics to the Japanese coupe.

The car in the accompanying images is badged M40i, which is expected to be the range-topping Z4 model – at least initially. Its propulsion comes via a 3.0-litre in-line six-pot shared with the M240i, producing about 350bhp.

We’ll have better pictures and more information to share with you once the car is revealed at Pebble Beach in just under a fortnight. That said, the full technical nitty-gritty will only be announced in October at the Paris motor show.

The new Z4 is expected to go on sale in Europe next March, so it’s possible we may see it locally in the second quarter of 2019.