What is your question?
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What is your question?
Every time I drive the vehicle. The speedometer keeps moving up and down. I tried a speed sensor but it don't want to work.
What makes this problem better or worse?
Speedometer keeping moving up and down
How long has your 2007 Toyota Avalon had this problem?
A while
Of course you know accelerating / decelerating will certainly cause that same thing to occur.