The Toyota Supra and BMW Z4 may not look the same from the outside, but underneath their unique exterior designs lies the same BMW-sourced 3.0-liter inline-six engine and platform. The Z4, of course, is a roadster only while the reborn Supra is a coupe, though a targa roof version is expected soon. And if you happen to own either of the two, or both, then you must take this latest piece of news very seriously.

According to the National Highway Traffic Safety Administration (NHTSA), both sports cars are facing a recall, though it was issued through BMW North America. The problem is with certain 2020-2021 model year Z4s and Supras with improperly welded fuel tanks.

Anything involving potentially defective fuel tanks needs to be taken seriously and this case is no exception. BMW claims the failed weld between the tank halves could allow fuel to leak, an increased fire risk when there's an ignition source. There's already a solution: a complete fuel tank replacement.

Z4s built from June 26, 2019 to July 9, 2020 and Supras completed from April 19, 2019 through July 16, 2020 are affected by the recall and BMW owners will begin to be notified shortly. Only a very small number of vehicles are involved, 14 Z4s and 35 Supras, to be exact.

The recall alert does not specifically state whether BMW will also contact Supra owners, but they'll surely be notified somehow. The recall will get underway on January 4, 2021 and will be done free of charge. Fortunately, BMW is not aware of any injuries or deaths in relation to this problem and hopefully it'll remain that way.

This isn't the first time both vehicles have been recalled. In September 2019, an improperly welded seat belt loop mount was discovered and could become damaged in a crash. Prior to that at the end of 2019, they were recalled because of headlights that could potentially fail.