INCORRECT SATNAV ETT&ETA

May 2015 I bought a 2nd hand 2013 Nissan Pathfinder LE. <br> I soon realised that the onboard SatNav system does not provide me with the correct Estimate Time of Travel (ETT). Only during our family holiday in July I realised the extend of the problem. eg It will take me excess of 6 hours to travel from Beaufort West to Stellenbosch 415km which actually only took me 4H30 hours. My cell GPS also has an ETT in the region of 4.5hours.<br> I brought this under the attention of Nissan Stellenbosch on 13 July 2015. <br> Nissan South Africa told me to do a software upgrade at an cost of R4500 vat excl. <br> It was then later agreed that the cost will be split three ways.<br> This is not an isolated issue. When I Google it I find various forums making mention of incorrect ETA &amp