DETROIT (NEWSnet/AP) — U.S. highway safety regulators have opened yet another investigation into problems with Teslas, this time tied to complaints that the seat belts may not hold people in a crash.

The investigation by the National Highway Traffic Safety Administration covers an estimated 50,000 Model X SUVs from the 2022 and 2023 model years.

The agency says it has two complaints from Tesla owners that the front belts weren’t sufficiently connected at the factory.

While neither complaint involved a crash, they allege that the linkage and pretensioner to the seat belts separated from the seat frames when force is exerted.

There also are investigations into complaints that some steering wheels can suddenly disconnect and that suspension parts can fail.

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