Tesla Motors announced on Tuesday that it was voluntarily recalling 7,000 accessory charging adapters after receiving two reports of the devices overheating.

The affected adapters are the NEMA 14-30, 10-30, and 6-50. None of them come standard with a Tesla, meaning that only a few customers who purchased the devices, which were designed by Tesla and produced by a supplier, are subject to the recall. There have only been documented cases of the first adapter, the NEMA 14-30, overheating, but Tesla wants to pull the entire line to be safe, as they share “common elements.”.

“These are the only two such incidents that we know of anywhere in the world and neither resulted in any injuries or property damage,” Tesla said in an email to customers, explaining that the company learned of the malfunctions in November. “However, out of an abundance of caution, we’re replacing NEMA 14-30, 10-30 and 6-50 adapters that were made years ago by our original supplier.”

Tesla shared a graphic that shows which adapters are and are not affected by the recall.

The company is asking customers with NEMA 14-30 adaptors to try to avoid using them to charge their Teslas until a replacement is shipped to them in the next couple weeks. People who own 10-30 and 6-50 adapters will get new ones in about three months, but the company says owners should continue to use them in the meantime since nobody has observed an actual case of them overheating.

It could be so much worse for Tesla. They could, for instance, be Samsung.

More information about the recall can be found on Tesla’s website.

Photos via Tesla, Getty Images / Win McNamee / Tesla