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Tesla upgrading wall adapters to prevent garage fires

A Tesla on display at the 2014 International CES in January in Las Vegas.
Getty Images
A Tesla on display at the 2014 International CES in January in Las Vegas.

Tesla Motors said Friday it will upgrade its wall charger adapters amid reports they are overheating in garages.

Tesla said the upgraded adapter will be provided to all existing and new customers starting in a few weeks.

In December, the electric-car maker issued a software upgrade to potentially avoid fires from Model S owners who plug into under-capacity or faulty electrical circuits.

"We believe (the software update provided in December) fully addresses the problem," the company said, in a statement. "However, to provide additional protection for Model S customers, we have designed a new wall adapter with a thermal fuse...Although we do not believe the improved adapter is required to address the issue, we are taking this step as part of our commitment to full customer satisfaction."

Additionally, Tesla said it has informed the National Highway Traffic Safety Administration of its proactive measures.

Tesla is expected to build 21,500 Model S units this year. Most of them will be sold in the U.S., with a smaller percentage in Europe, where the company is still establishing a sales network.

Tesla shares were down more than 2 percent.

(Read more: Tesla mightfind a buyer in 2014: Pro)

—By CNBC's JeeYeon Park. Follow her on Twitter @JeeYeonParkCNBC

(*The article has been corrected to reflect Tesla's December software update in the first portion of the company's statement.)

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