The aging X4 will bow out of production later this month, closing the chapter on BMW’s internal-combustion SUV coupe without a direct ICE successor. Yet the story doesn’t end there.

BMW is already working on a replacement, but it reimagines the formula for the electric age. The all-new iX4 is designed as a sportier counterpart to its square-roof sibling, the Neue Klasse iX3.

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Our spy photographers captured the first camouflaged prototype during development testing. At a glance, the iX4 appears to borrow its front end from the iX3, including the headlights, grille, bumper, hood, and fenders.

From the B-pillar rearwards, though, the bodywork tells a different story. The profile has been reworked with a sloping roofline that flows into a fastback-style tail.

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The rear glass is more steeply angled than on the outgoing X4 and carries a discreet spoiler at its tip. Its sportier posture is further accentuated by broader, muscular rear shoulders that appear cleaner and more sculpted than those of the smaller, boxier X2 and iX2.

At the rear, the iX4 features slim LED taillights positioned close together, while the license plate has been relocated to the bumper. The prototype sits on ten-spoke alloy wheels with a diamond-cut finish, though it remains uncertain whether this design will make it to the production version.

Although exact dimensions remain unconfirmed, the iX4 is expected to be marginally longer than the new iX3, which measures 188.3 inches (4,783 mm), while maintaining the same 114.1-inch (2,898 mm) wheelbase. It may also improve upon the iX3’s already low drag coefficient of 0.24 cd.

Inside, the iX4 will mirror the iX3 almost entirely, keeping the same layout, sans some headroom for the rear passengers.

That means BMW’s Panoramic iDrive stretching pillar to pillar, a 17.9-inch infotainment touchscreen, and an optional 3D head-up display, all running on the new BMW Operating System X.

The new model will be built on the Neue Klasse architecture, meaning it will be offered exclusively as a battery-electric vehicle. Its powertrain range is expected to mirror that of the iX3.

More: BMW’s X1 Will Get A Radical Makeover With Neue Klasse Style And Tech

Currently, the iX3 50 xDrive delivers 463 hp (345 kW / 469 PS) through dual electric motors, while future variants are expected to include single-motor rear-wheel-drive options and higher-performance M-badged versions.

The BMW iX4 is expected to debut in late 2026. It will be the second fully electric coupe SUV from the Bavarian company, following the iX2 that was introduced in 2023. A larger iX6 is also rumored to follow at a later stage.

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