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Hi Laura, I have an 07 Limited, and had the same issue with the speedometer. They reprogrammed my ECU and although not perfect, it is noticeably better. Hyundai released a TSB that fixes the 2007 Elantra speedometer issue. The procedure re-programs the ECU to fix the error. It addresses only those vehicles with production dates between August 1, 2006 to May 28, 2007. The date is inside the driver door jamb. Mention TSB # 07-90-010 dated 9/6/07 and see if yours qualifies. Hope this helps! AllanReport it
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