Q: Spark Plug Socket size and extension bar

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I want to buy spark plug socket for my santa fe but i do not know which size (metric) the socket should be. Also, I heard extension bar in required to reach the deep plug. How long should the extension bar be? Thanks in advance.

My car has 142034 miles.
My car has an automatic transmission.

Depending on your preference I would recommend a spark plug socket 5/8 with at least a 8 to 10 inch extension. Get the locking type of extension to lock to the socket so it will not get stuck on the spark plug when removing it.

Personally, I use an extension attached with the socket but I also have a long extension with a socket that is permanently attached. I need to use these in different scenarios due to the vast amount of different types of cars and trucks I work on. You basically only need the locking extension and 5/8 socket. This will do the trick for you. If you’re unsure and don’t feel comfortable doing the job yourself, I’d recommend having a mechanic switch out the plugs for you.

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