You can help to improve database accuracy by reporting any errors you encounter.
• Report errors in freeways and main “verified” roads shown in black on the map at http://mapreporter.navteq.com/ dur-web-external/.
• Please do not report errors in purple “unverified” roads. Maps for these areas are provided for reference only.
• Please do not report errors in places/ landmarks, such as changes in business names. Information about points of interest are constantly being updated.
An updated database is available for purchase, usually in the fall of each year.
• For vehicle position icon errors, screen error messages, or other GPS-related errors:
Guidance Screen
...
Reporting Safety Defects
In the U.S.
If you believe that your vehicle has a defect which could cause a crash or
could cause injury or death, you
should immediately inform the National Highway Traffic Safety Administration ...
Main Valve Body Disassembly, Inspection, and Reassembly (A/T)
Clean all parts thoroughly in solvent, and dry them with compressed air.
Blow out all passages.
Do not use a magnet to remove the check balls, it may magnetize the check
balls. ...