<story><title>Changes to Models S and X allow them to travel longer without larger batteries</title><url>https://www.tesla.com/blog/longest-range-electric-vehicle-now-goes-even-farther</url></story><parent_chain><item><author>jac_no_k</author><text>This &amp;quot;continuous deployment&amp;quot; for cars must be a logistical nightmare.  To do repairs for a given vehicle, keeping track of what parts are backward compatible would be challenging.  What if it&amp;#x27;s a compatibility breaking change?  Then keeping inventory for older cars would become problematic.&lt;p&gt;Unless they do design with maximum compatibility.  Then it gets interesting as upgrades are possible.&lt;p&gt;While B.EV cars maintenance is low, my car 7 months into ownership revealed bad battery cells that needed replacing.  If the car was say five years old, would this replacement have been possible?</text></item></parent_chain><comment><author>cperciva</author><text>Is it any worse than what other manufacturers deal with?  The 2019 Honda Accord shares some parts with the 2018 Honda Accord which shares some parts with the 2017 model... when something breaks in my Honda the first question is &amp;quot;do they still make&amp;#x2F;use this part or did they change it in newer models?&amp;quot;</text></comment>
<story><title>Changes to Models S and X allow them to travel longer without larger batteries</title><url>https://www.tesla.com/blog/longest-range-electric-vehicle-now-goes-even-farther</url></story><parent_chain><item><author>jac_no_k</author><text>This &amp;quot;continuous deployment&amp;quot; for cars must be a logistical nightmare.  To do repairs for a given vehicle, keeping track of what parts are backward compatible would be challenging.  What if it&amp;#x27;s a compatibility breaking change?  Then keeping inventory for older cars would become problematic.&lt;p&gt;Unless they do design with maximum compatibility.  Then it gets interesting as upgrades are possible.&lt;p&gt;While B.EV cars maintenance is low, my car 7 months into ownership revealed bad battery cells that needed replacing.  If the car was say five years old, would this replacement have been possible?</text></item></parent_chain><comment><author>mecameron</author><text>I bought a 2013 Model S recently that had its wheels swapped with a 2016 Model S by a third party before sale (I didn&amp;#x27;t care for the 21&amp;quot; wheels that were on the 2013, and the buyer of the 2016 wanted them). Shortly after driving away from the dealer, the tire pressure sensor system reported faults. After bringing it in to Tesla they said the newer tires and older car were not compatible, but they could easily downgrade the electronics in the wheels or upgrade the electronics on the car. They were both about the same cost, so I just had them update the wheels.</text></comment>