Back in January, Toyota recalled about 700,000 cars due to fuel pump problems. Now, that recall has been expanded to 1.5 million units. Not ideal!

The defective part in question is a fuel pump provided by Denso, an automotive parts manufacturer. Toyota still hasn’t given a reason why the issue is happening, but it did note that the problem can cause the engine to stall. Obviously that’s not great when you’re cruising down the highway, but it’s also a pain in the ass if you find your car isn’t running—or is running poorly—when you’re heading to work.

So, if your Toyota or Lexus has suddenly started running rough—or if a warning light has popped up on your dashboard telling you something’s going on with the pump—it’s high time to get it checked out. If you’ve just bought one of the cars in question—which my family just did with a new Toyota RAV4—then you’re definitely going to want to make sure everything’s kosher.

The recall is expected to begin on December 23, so owners of the impacted vehicles will likely be notified before then—but if you own one of the problematic vehicles, you can run your VIN number through the to see if your car is one of those impacted.

As of right now, Toyota hasn’t mentioned anything about reimbursement, but the oldest model year involved here is from 2017, so most cars should still be under warranty.

The impacted Toyota models are as follows:

2018-2019 4Runner2019-2020 Avalon2019 Corolla Hatchback2017-2019 Highlander2018-2020 Camry2020 Corolla2018-2019 Land Cruiser2017-2020 Tacoma2019-2020 RAV42019-2020 Sequoia2017-2020 Sienna 2019-2020 Tundra

And now for Lexus:

2018-2020 ES3502017 GS200t2017-2019 GS3502019 GS3002018-2020 LC500h2019-2020 LS5002018-2019 GX4602017 IS200t2019 IS3002019 IS3502018-2020 LC5002018 LS5002019 LS500h2018-2019 LX5702017 RC200t2019 RC3002019 RC3502017 and 2019-2020 RX3502018-2020 RX350L

2019 UX200 2018-2019 NX300