dme361

We took our new to us '09 RX350 on the road this weekend and noticed that the speedo and information center ran about 2 mph less than the TomTom indicated. Now I wonder which is more accurate.

My son has a similar TomTom and we have an older Garmin. I'm thinking or plugging them all in and going on a field trip.

If gps is accurate, can the speedo be calibrated? Thanks

Carver

What size tires and wheels?

lexus114

My 05 RX speedo show`s the car is going 2mph faster than what the gps shows. I can live with that though, helps to keep me out of trouble.

pauljcl

Yes, I'm +3 mph indicated -real. No problem once known.

RX3302004

I noticed my '04 doesn't match the GPS either...I forget which way up or down but it was about 2mph also.

RX330inFL

Welcome to Club Lexus, dme361.

In short, no -- your speedometer cannot be calibrated.

Like many topics, this one has been discussed on several occasions. Familiarize yourself with the search features of the forum(s) here at CL to research your questions before posting any new threads. If you had searched you would have found the following which includes a great deal of information on the why's and how's of your question.

https://www.clublexus.com/forums/rx-...-accuracy.html