Next Lexus IS Might Get Supra’s BMW-Sourced Straight Six

If we were to believe the latest rumors, it seems that the next-generation Lexus IS could be powered by the same BMW-developed 3.0-liter turbocharged straight-six as the brand new Supra.

Japan’s Best Car magazine broke the news, and while it remains to be seen if it’s true or not, it wouldn’t be all that surprising. After all, both the BMW M340i and BMW Z4 M40i are powered by the same B58 engine as the Supra, but the German models get a healthy 382 hp while the Supra has to make do with 335 hp.

The Supra engine won’t be the only powertrain allegedly offered in the next-generation Lexus IS. In fact, the Japanese report claims that buyers will also have the choice of a 2.0-liter turbo, a 2.4-liter turbo, and a 2.5-liter hybrid.

That’s not all. The IS F could make a comeback in the model’s next generation and make use of the twin-turbo V6 from the LS 500 sedan. In its current form, this twin-turbo V6 delivers 416 hp, the same amount as the old, naturally aspirated V8 IS F. Lexus engineers could almost certainly tweak the LS 500’s engine for use in the IS F to give it a little more character and power.

Beyond its engines, the new IS will probably be similar in size to the current car but weigh considerably less, tipping the scales at around 3395 lbs (1539 kg) in base specification. By comparison, the outgoing IS weighs roughly 3737 lbs (1695 kg), making it heavier than its German rivals. Lexus is expected to unveil the next-generation IS in 2021 before it goes on sale for the 2022 model year.

Carscoops has reached out to Lexus to find out more about the next-gen IS, so stay tuned as the story will be updated once we get a response.

Update: In an email to Carscoops, Lexus said that it can’t comment on reports about future products.

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  • vvmdrf

    RIP reliability

    • SpongeBob99Swell

      Even though Toyota supervised the new Supra’s straight-six (hence customized and everything done how they wanted theirs to be in the first place) to make it reliable and succeeded…

      …I’m listening.

      • HaltestelleLuitpolthafen

        Where’s your source?

        From what I’ve heard, it was an off the shelf engine that wasn’t modified at all. That includes the ECU tuning.

  • Christian

    so it’s a BMW 3 serie now… oHhh Good.. Or wait, this is not bad… 🙂

    • Gustavo Adriano

      In the future, we could say that BMW is a german brand with a japanese engine, or Lexus is a Japanese brand with german engine? I don’t know what to think anymore…

      • Bash

        True, I dont know which one is worse.

  • salamOOn

    dont you dare toyota!!!

    • Mr. EP9

      They’ll do it.

    • ErnieB

      If they did it to the Supra, Toyota’s “halo” sports car, what makes you think they won’t do it to an IS..

  • Honda NSX-R

    Bullshit

    • ramish rambarran

      2nd that motion !

  • DetrinKD

    Makes no sense when they can detune the new TT from the LS.

  • Craig

    The REASON I would buy a Lexus [the main one anyway] is because it’s a LEXUS. I don’t want a BMW engine in my Lexus.

    • brn

      I don’t want a BMW engine in my BMW.

      • Mike anonymous

        lol

      • Craig

        lol

    • Ary Wisesa

      Agree. Definitely I won’t buy a Lexus with BMW engine. Not at all. Lexus engines are very well made, very smooth and above all, very reliable. If Lexus is no longer Lexus, what’s the point of buying it?

  • PhilMcGraw

    1. It’s a rumor with no real evidence to back it up.

    2. The rumor doesn’t exactly make sense considering that they are suggesting there being a total of 4 engines for the non-F version of the IS. When was the last time you saw Lexus offer 4 engines for one car with an additional 5th F version?

    3. Even if true, it’s one engine with the other 4 being Lexus made engines. If you don’t want a BMW engine then just buy one of the other 4 engines.

  • Mr. EP9

    Hopefully it stays a rumor.

  • Rocket

    If it weren’t for the Supra, I’d say it’s nothing more than a wild rumor. But since Toyota dealerships will need to be trained to service the BMW I-6, it actually seems quite logical. I’m not sure if they can stomach to use the ZF gearbox though. Using the ZF8 in the Supra must be painful for Toyota.

    • Silimarina

      Why? Toyota auto gearboxes are sloooooooooow. Hope the next Is will not have those stupid CVT’s

      • Rocket

        Because Toyota has a 30% stake in Aisin. You can see how using a competitor’s transmission could send the wrong message, right? For the few who know, that is.

        Like many modern units programmed to prioritize efficiency, the popular Aisin 8-speed transverse gearbox can be slow to downshift, but the longitudinal 8-speed Aisin transmission I had in my Touareg was actually quite good. VW made the switch to ZF for the current MLB Evo-based Touareg, but that was likely for consistency across the platform rather than the result of problems or complaints with the Aisin unit.

        • Silimarina

          I didn’t knew that Toyota has stake in Aisin. Makes sense what you said. Still, I hope the next IS will not have a cvt transmission.

  • Merc1

    Who cares about the engine, it’s the 2022 I have a problem with. The current IS is ancient NOW.

    M

  • TrevP

    Guess we will see. Specs will be good

  • EL CHAPO THA GREAT

    Rumors are never true.

  • GE90man

    Does this mean the sienna might potentially get the BMW straight 6 too?

  • Bash

    As much as it makes sense, but we want first to have few years before this happens, we need to have trust and establish a doubtfulness in that engine,

  • SteersUright

    Next IS should be a fascinating proposition, an opportunity for Toyota to do something fun and properly sporty. Hopefully has nothing derived from a BMW and has their own twin-turbo engine, for longevity, reliability, and all we expect from Lexus. The lighter weight is awesome news too.

  • Navy Pier Moroccan ✓ᵛᵉʳᶦᶠᶦᵉᵈ

    I am modestly baffled with the choice Toyota Motor Corporation has concluded with Bayerische Motoren Werke and their collaboration at introducing an engine for the all-new Toyota Supra; although, I will admit the Supra isn’t my cup of tea, but Toyota’s reliability image may be in jeopardy after this BMW built engine has been approved and appointed for this sports car. Nevertheless, the Lexus IS could mate with this BMW built engine, and this could sway away many enthusiasts from the IS, regardless of some brand loyalists. I would rather have merged with Renault-Nissan than BMW when it comes to engines in the Infiniti formula.

  • ramish rambarran

    Well said !

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