BMW Reportedly Re-Engages with Range Extender Technology for Next-Gen X5
As AI systems move beyond text and into complex real-world applications, the automotive industry continues to explore diverse powertrain solutions. BMW is reportedly considering a return to range-extended electric vehicles (REEVs), with plans to introduce such models in the Chinese and US markets. Speculation suggests that the sixth-generation X5, second-generation X7, and the flagship 7 Series could all receive this option. A range-extended version of the all-new X5 is anticipated by 2026.
Context
BMW previously ventured into REEV technology 12 years ago with the BMW i3 REEV. Launched in 2013 and discontinued in 2022, the i3 REEV sold approximately 50,000-60,000 units globally, contributing to a total of 250,000 i3 units sold over nearly a decade. Despite its advanced features, the i3 REEV did not achieve significant market penetration.
Under the Hood
The i3 featured a LifeDrive body structure, which was the first mass-produced carbon fiber body in a luxury brand. This structure combined a carbon fiber composite passenger cell with an aluminum chassis, prioritizing lightweight construction and strength. The BMW i8 also utilized this structure.
The i3 REEV's powertrain was notable for its use of a 647cc twin-cylinder engine, derived from a BMW C650GT scooter, as its range extender. This engine, detuned from 60 horsepower to 38 horsepower for its automotive application, was a necessary compromise due to the i3's compact dimensions.
For instance, the 2014 i3 REEV, initially introduced in China, featured a 22 kWh battery and a 170 hp rear-wheel-drive motor, paired with an 8-liter fuel tank. With a full tank and full charge, it offered an approximate range of 270 kilometers. The pure electric version, with the same 22 kWh battery but nearly 200 kg lighter, had a range of about 150 kilometers.
In 2016, both the REEV and pure electric versions received a battery upgrade to 33 kWh, extending the pure electric range. However, the REEV version was discontinued after the 2018 model year, with the pure electric version lasting until the 2020 model, which featured a 42.2 kWh ternary lithium battery capable of approximately 300 kilometers of range.
Why It Matters
The i3 REEV's initial market performance was influenced by the nascent state of range extender technology and infrastructure at the time. Its carbon fiber construction also contributed to a higher price point. However, current market conditions and technological advancements present a different landscape.
The Chinese market, for example, is the world's largest REEV market, with 1.167 million units sold in 2024. REEV SUVs, particularly those priced above 400,000 yuan, have seen substantial sales, exemplified by models like the Li Auto L9 and AITO M9. In the US market, REEVs are gaining traction, with models from Jeep and Ram pickups confirmed to receive REEV variants. For American driving scenarios, REEVs offer a practical solution for both short commutes and long-distance travel.
From a structural standpoint, BMW is reportedly collaborating with ZF on the new range extender system. This system is rumored to incorporate a smart clutch and differential, potentially allowing the engine to directly drive the wheels under specific conditions.
Regarding the range extender engine, it is anticipated that the all-new BMW X5 will utilize BMW's B48 2.0T engine, rather than a motorcycle engine. For batteries, BMW is working with CATL to develop NMC cylindrical cells. Domestic luxury REEVs commonly feature large batteries, often starting at 60 kWh and reaching 80 kWh, suggesting that the new X5 REEV would need a substantial battery capacity to compete effectively in the Chinese market.
What Comes Next
BMW has indicated that the all-new X5 will offer a variety of powertrain options, including pure electric, range-extended, plug-in hybrid, internal combustion engine, and hydrogen fuel cell. This strategy aims to cater to a broad spectrum of consumer preferences. The Chinese market is expected to receive pure electric, range-extended, and ICE powertrains.
However, the domestic REEV market is highly competitive. Models like the Li Auto and AITO have established a strong presence in the mid-to-large REEV SUV segment, emphasizing not only range but also intelligent driving features, smart cockpits, and spacious interiors. The launch of the AITO M9, for instance, reportedly impacted BMW X5 sales, indicating a shift in consumer loyalty towards experiential value.
BMW's re-entry into the REEV market is considered late by some observers. To achieve competitiveness, BMW may need to leverage its strengths in handling and luxury while innovating in intelligent experience and practical features to differentiate its offerings.