2027 BMW X5 G65 & iX5 Leaks: Specs, B58 Engine & 148 kWh

The Ultimate Tech Buffet on Wheels: The 2027 BMW X5 G65 Redefines Multi-Powertrain Engineering

In an era where automotive manufacturers are forced to pick sides between pure electromobility or legacy internal combustion engines, BMW is taking a fiercely independent path. The upcoming fifth-generation BMW X5, codenamed G65, is breaking the traditional “one size fits all” mold. Instead, Munich is preparing an absolute technical feast on wheels, engineering a single platform capable of housing five distinct propulsion archetypes: mild-hybrid gasoline, clean diesel, high-performance plug-in hybrids, battery-electric (iX5), and hydrogen fuel cells.

With official series production scheduled to kick off in late 2026 at the legendary Spartanburg plant in South Carolina, USA, leaked factory data has already laid bare the technical blueprint for what will be the most versatile premium midsize SUV on the global market for the 2027 model year.

1. Dimensions, Weight, and Architecture: Bigger Footprint, Lower Silhouette

The BMW X5 G65 continues its reliance on a heavily modified iteration of the flexible CLAR (Cluster Architecture) platform. However, to stay ahead of structural safety regulations and integrate massive battery arrays without compromising the classic X5 proportions, the chassis footprint has undergone a dramatic transformation.

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Exterior Dimension Comparison

Cabin Roominess and Hauling Capacity

The 60 mm extension of the wheelbase is a deliberate engineering move to address rear-seat legroom, directly answering consumer feedback. Despite a slightly sleeker, more aerodynamic roofline, luggage capacity remains incredibly practical. The rear cargo hold serves up 654 liters of standard volume, expanding to a massive 1,849 liters once the split-folding rear seats are completely dropped down.

Crucial Tech Weight Note: The addition of localized structural reinforcement and mandatory 48V mild-hybrid integration across all combustion variants means the base gasoline model will tip the scales at 2,290 kg (5,049 lbs) without a driver—marking a weight penalty increase of roughly 125 kg over the previous generation.

2. Internal Combustion Lineup: The Survival of the Sixes and Eights

BMW is making it crystal clear that internal combustion engines (ICE) remain a core pillar of its global strategy, refining its powertrains to meet ultra-stringent global emission mandates while squeezing out more performance.

X5 40 xDrive: The Highly Evolved B58

The entry-level global gasoline variant features the newest revision of the critically acclaimed 3.0-liter turbocharged inline-six engine family, carrying the internal designation B58B30M3.

• ICE Output: 394 HP and 540 Nm (398 lb-ft) of torque (a bump of 19 HP over the current model).

• Mild-Hybrid Injection: An advanced 48V electric motor is sandwiched directly into the housing of the 8-speed Steptronic transmission, throwing an extra 17 HP and a heavy burst of 200 Nm (148 lb-ft) of torque into the mix for instant low-end throttle response.

X5 M60 xDrive & The Long-Distance Diesel

For drivers demanding absolute mechanical muscle and the traditional acoustic rumble of a high-end powertrain, the M60 xDrive retains a updated 4.4-liter Twin-Turbo V8 working in tandem with the same 48V architecture.

Simultaneously, the high-efficiency X5 40d xDrive will anchor the European and fleet markets. Utilizing a highly pressurized 3.0-liter inline-six turbodiesel, it generates 300 HP and a massive 670 Nm (494 lb-ft) of torque, securing an uncompromised driving range for trans-continental towing and highway cruising.

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3. Plug-In Hybrids (PHEV): Bridging the Infrastructure Gap

To capture the demographic that demands zero-emissions commuter flexibility without facing public charging anxieties on long family journeys, the G65 platform introduces two highly targeted plug-in hybrid variants: the X5 50e xDrive and the high-performance X5 M60e xDrive.

The M60e xDrive, which has been spotted undergoing aggressive high-speed testing at the Nürburgring sporting a quad-exhaust layout, will marry the updated B58 inline-six with a potent synchronous electric motor. Total system output for this electrified M Performance model is rumored to approach 612 HP, utilizing fifth-generation battery cell chemistry to stretch the all-electric driving range significantly further than any previous X5 PHEV.

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4. The Fully Electric iX5: Packing a Record-Breaking 148 kWh Battery

Arriving in the first half of 2027, the fully electric iX5 50 xDrive and flagship iX5 M70 xDrive variants skip standard configurations to introduce BMW’s revolutionary Gen6 eDrive technology.

BMW Gen6 eDrive Architecture (800-Volt)
 ├── 30% Faster Charging Speeds
 ├── High-Density 120mm Cylindrical Cells (46mm Diameter)
 └── Massive 147.8 kWh Battery Pack (iX5 60 xDrive)

The real showstopper in the lineup is the leaked iX5 60 xDrive. Validated by preliminary EPA filings, this model packs a colossal 147.8 kWh gross battery pack—the single largest battery ever fitted into a production BMW passenger vehicle.

• Powertrain Output: The dual-motor system delivers a combined 577 HP and well over 800 Nm of instant torque.

• Range and Charging: Shifting to a high-efficiency 800-volt electrical architecture, the iX5 slashes standard charging times by 30%, pushing overall driving range expectations north of 800 kilometers (approx. 500 miles) on a single charge. This massive range effectively neutralizes standard EV criticisms regarding road-trip viability.

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5. Hydrogen Fuel Cell (FCEV): The Long-Term Alternative

Further down the line—tentatively targeted for 2028—BMW will roll out the ultra-exclusive iX5 Hydrogen, developed in close technological cooperation with Toyota.

Unlike early experimental fleets, the production iX5 Hydrogen benefits from a deeply optimized packaging setup. The high-pressure hydrogen storage tanks are configured horizontally in the exact central floor cavity where the pure electric version stores its battery pack. Bolstered by a more compact, third-generation fuel cell stack, engineers have successfully placed a second electric motor onto the front axle. This dual-motor layout provides carbon-free, tailpipe-emission-free driving with a 750 km range, capable of refueling to 100% capacity in less than four minutes.

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6. Design Evolution: The “Neue Klasse” Aesthetics

Visually, the X5 G65 marks a sharp break from the safe, incremental design evolutionary steps of the past. Borrowing heavily from the clean design ethos of the Neue Klasse design language, the exterior surfacing is stripped of redundant body lines.

• Front End Styling: Features a significantly more integrated, smaller, and crisply illuminated kidney grille paired with sleek headlight housings that drop the current styling for vertical LED elements.

• Aerodynamic Cleanliness: Flushed door handles and winglet-style door pulls integrated cleanly into the beltline drop the vehicle’s drag coefficient.

• Interior Tech: The cabin completely ditches the physical iDrive rotary controller. It transitions to iDrive X, a futuristic infotainment layer anchored by BMW Panoramic Vision—a full-width digital projection stretching across the lower base of the windshield—complemented by a massive 17.9-inch central touch array and a newly designed haptic steering wheel.

Source: 2027 BMW X5 (G65): Neue Klasse-SUV mit Elektro, Hybrid, Diesel, Benziner und Wasserstoff