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this, or a Vinfast?

Lexus’s first EV, the RZ 450e, is pretty mid—glitchy and inefficient

Toyota’s luxury brand must try harder if it wants to sell a million EVs by 2030.

Jonathan M. Gitlin | 187
A 2023 Lexus RZ 450e
This is Lexus' first battery-electric car, the RZ 450e. Credit: Jonathan Gitlin
This is Lexus' first battery-electric car, the RZ 450e. Credit: Jonathan Gitlin
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When Lexus started building luxury cars at the end of the 1980s, it took the rest of the auto industry a bit by surprise. Toyota wanted to show off that it could build the best car in the world, and the original Lexus LS400 was a credible effort to do just that. Three decades on, Lexus now has its first battery-electric vehicle. BEVs are Lexus’ future—it wants to sell a million of them by 2030, starting with this car, the 2023 RZ 450e. But don’t expect this electric Lexus to make the same kind of splash as the LS400 did—this is not a car that’s going to challenge for best in class.

It is fair to say that the industry-wide shift to battery-electric vehicles has caught out the world’s largest automaker. Toyota was an early frontrunner in electrification with hybrid powertrains—the Prius is now in its sixth iteration and has sold millions—but it has been much more cautious regarding BEVs. There was an early dalliance with the RAV4 EV, which showed up in small numbers in the US before being canceled in 2002, and then not much until very recently. Now Toyota has developed its first modern BEV, using lithium-ion (rather than nickel-metal hydride), called the bZ4x. There’s a badge-engineered Subaru version, too, and this Lexus variant as well.

Design

Instead of starting with a clean-sheet design, like rival Volkswagen Group, Toyota decided to modify its existing modular vehicle architecture (called TNGA) to allow it to make BEVs (the new architecture is known as e-TNGA). I was going to write that it’s a relatively small crossover by 2023 standards until I checked the dimensions against other EVs; at 189.2 inches (4,806 mm), it’s longer than a Ford Mustang Mach-E, Volkswagen ID.4, or Jaguar I-Pace—perhaps the RZ 450e’s closest spiritual competitor. (It’s a pretty average 74 inches/1,880 mm wide and 64.4 inches/1,636 mm tall.)

A 2023 Lexus RZ 450e seen from behind
Its design is very angular but also extremely hard to photograph well.
Its design is very angular but also extremely hard to photograph well. Credit: Jonathan Gitlin

The RZ’s shape is immediately familiar as a Lexus, embracing the brand’s current angular design style. It’s certainly a challenging car to photograph well!

Powertrain

The RZ 450e uses a twin-motor powertrain with a drive unit for each axle. Somewhat unusually for an all-wheel drive EV, this one has the more powerful drive unit at the front—in this case, a 201 hp (150 kW), 194 lb-ft (263 Nm) permanent magnet synchronous motor, with a 107 hp (80 kW), 124 lb-ft (168 Nm) permanent magnet motor at the rear. Combined power output is always a function of the battery pack and often less than just adding the two motors’ outputs together, but here, the RZ 450e does have a combined 308 hp (230 kW).

The lithium-ion battery pack lives between the axles. It’s supplied by Prime Planet and Energy Solutions and has a capacity of 71.4 kWh, though only 64 kWh is useable.

And that’s probably the RZ 450e’s biggest weakness. On 20-inch wheels, as in the case of our RZ 450e Luxury ($65,150, and there’s no IRS clean vehicle tax credit), Lexus says it should have a range of 196 miles (315 km). Unfortunately, even that appears to be highly optimistic; after charging our test car to 93 percent, it reported a mere 143 miles (230 km) of range.

Under the hood of a Lexus RZ 450e
The Lexus platform leaves no room for a frunk under the hood.
The Lexus platform leaves no room for a frunk under the hood. Credit: Lexus

When the car was dropped off, it had averaged 2.8 miles/kWh (22.2 kWh/100 km) over an unknown time frame—the trip computer is not particularly forthcoming with the details we would like. After about 150 miles of mixed city and highway driving, it reported an average of 3 miles/kWh (20.7 kWh/100 km), yet this was not reflected in the estimated range. By my math, there’s about 36 miles’ (57 km) discrepancy between the theoretical range (miles/kWh x battery capacity) and the reported range. Lexus says that the RZ 450e Premium on 18-inch wheels ($59,650) should have a range of 220 miles (354 km).

Happily, charging proved pretty painless—certainly no guaranteed thing with a non-Tesla EV. I plugged into an Electrify America charger with 25 percent state of charge remaining, and 24 minutes later the car had reached 80 percent SoC. (To make things even better, the charger just worked, and I didn’t need to call the helpline.) The charging session peaked at about 140 kW. Lexus says that 0-80 percent should take 30 minutes, and a level 2 charger will require 9.5 hours to completely recharge the battery from zero.

What’s it like inside?

The RZ’s cabin is almost as dramatically styled as its exterior. In fact, we got a good preview of the RZ cabin layout in 2021 when Lexus showed off a number of different concepts. You’ll note the concepts in that article all feature a yoke instead of a steering wheel; this uses a steer-by-wire system (unlike the Tesla implementation, which simply swapped a steering wheel for a yoke), but it’s not currently available in the US. RZs for our market get a normal steering wheel with an actual steering column but sadly, very little by way of feedback.

Lexus RZ 450e interior
I rather like the RZ’s interior.
Lexus RZ 450e rear seats
The back seat really only has room for two.
Lexus RZ 450e with a yoke instead of a steering wheel
Lexus is not offering the steer-by-wire option here in the US yet.
Lexus RZ 450e cargo area
There’s 23.8 cubic feet (674 L) of cargo space with the rear seats in use.

You push a button to start the car, but about half the time, it required a second press of the start button before I could engage Drive or Reverse. The rest of the time, it just did what I asked without arguing.

The driving experience

While I’m complaining, the RZ’s ride is a little firm and bouncy for a luxury car, particularly at highway speeds. I was also dissatisfied with the amount of regenerative braking. There are four different levels, which you engage or disengage via the paddles on the steering wheel. But even on the highest setting, it’s not a true one-pedal driving experience, and the car will not come to a complete stop under regen.

In Sport mode, a 0-60 mph time of 5 seconds should be possible. But given the very poor efficiency, I spent almost the entire time with the Lexus in Eco mode. In this setting, it is more efficient but not very quick to accelerate.

Lexus fits its cars with a full complement of advanced driver assistance systems, and it’s quite easy to pick and choose which of these you want to enable or disable via the infotainment touchscreen. In addition to adaptive cruise control and lane keeping, there’s also an available traffic jam assist that allows you to go hands-free. There’s a gaze-tracking driver-monitoring system mounted to the steering column, and if the car detects you’re in a jam, it will engage the system, although only up to 25 mph (40 km/h).

Lexus RZ ADAS screen
It’s easy to turn on or off the various ADAS features.
It’s easy to turn on or off the various ADAS features. Credit: Jonathan Gitlin

Other than its refusal to show me more detailed trip information, I found the infotainment system to be one of the better examples to ship in a Lexus. It’s an entirely touchscreen-based UI as opposed to the trackpads you’ll find in other Lexuses, and it’s all the better for that.

There are some dedicated physical controls (for the cabin temperature, demisters, and volume), and the climate settings are touch-based but always live in the same place, so it should be possible to build up muscle memory. The built-in navigation app is perfectly fine, but since there’s wireless Apple CarPlay and Android Auto, I’m guessing few people will spend much time using it. Lexus has also implemented a pretty good voice-recognition system.

Toyota representatives often tell us that they think it makes more sense to use what limited lithium-ion battery supplies they have to make lots of hybrids rather than fewer BEVs. And honestly, if this is the best BEV it can build, I am inclined to agree with them. In many ways, I was even less impressed with the RZ than the Vinfast VF8 we reviewed last week. Neither is a particularly good BEV, but at least Vinfast has the excuse of not having built any cars before.

Listing image: Jonathan Gitlin

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Jonathan M. Gitlin Automotive Editor
Jonathan is the Automotive Editor at Ars Technica. He has a BSc and PhD in Pharmacology. In 2014 he decided to indulge his lifelong passion for the car by leaving the National Human Genome Research Institute and launching Ars Technica's automotive coverage. He lives in Washington, DC.
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