{"id":4460,"date":"2025-11-18T16:44:40","date_gmt":"2025-11-18T16:44:40","guid":{"rendered":"https:\/\/teslhub.com\/?p=4460"},"modified":"2026-02-16T15:37:37","modified_gmt":"2026-02-16T15:37:37","slug":"tesla-semplifica-il-computer-fsd-hw4-meno-componenti","status":"publish","type":"post","link":"https:\/\/teslhub.com\/en\/tesla-semplifica-il-computer-fsd-hw4-meno-componenti\/","title":{"rendered":"Tesla simplifies its HW4 FSD computer: fewer components, leaner design"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Tesla continues to <strong>optimise manufacturing<\/strong>, with the <strong>FSD Hardware 4 computer, also called HW4 or AI4<\/strong>, now under examination. The computer supports driving assistance in newer Model 3 and Model Y cars. According to analysis by the well-known hacker Green, the revised version had a <strong>simpler, leaner design<\/strong>, reflecting cost reduction and engineering simplification as Tesla prepared for AI5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fewer components, the same goal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Green found that <strong>several components had been removed<\/strong> from the revised board and associated wiring. The most noticeable changes included:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>removing <strong>some secondary connectors<\/strong><\/li>\n\n\n\n<li>eliminating the <strong>small batteries<\/strong> dedicated to the board\u2019s internal clock<\/li>\n\n\n\n<li>and <strong>removing the copper ground cable<\/strong>, replaced by a direct connection to the vehicle chassis, a common automotive practice<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Although apparently small, these changes could mean <strong>lower material costs<\/strong> and <strong>simpler manufacturing processes<\/strong>, two central elements of Tesla\u2019s approach.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Structural simplification of HW4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The changes were not only about saving money.<br>Using the vehicle chassis as an electrical grounding point could <strong>reduce wiring weight and complexity<\/strong>, making factory assembly work easier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Removing the small batteries dedicated to the RTC, or Real-Time Clock, module also allowed it to <strong>rely on the vehicle\u2019s low-voltage battery<\/strong> for continuous power, reducing the number of components that might fail over time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At manufacturing scale, each unused connector or component represents <strong>an avoidable cost<\/strong>. Tesla appeared to be applying lean manufacturing even to less visible details.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Preparing for the next step: AI5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The revision came as Tesla prepared to introduce <strong>AI5<\/strong>, which this November 2025 report expected to enter <strong>mass production in 2026<\/strong>. Why keep optimising HW4 if a replacement was approaching? The argument was scale: the report projected <strong>more than two million vehicle sales<\/strong> before the complete transition, so small savings repeated across those volumes could have <strong>a substantial financial impact<\/strong>. These were projections made at the time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It was also considered likely that some HW4 refinements drew on testing and knowledge accumulated during AI5 development. The revised HW4 already included a <strong>front bumper connector<\/strong> for fitting the <strong>front camera<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What to expect<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The changes suggested more than simple cost cutting: Tesla was <strong>rationalising the vehicle architecture<\/strong> with the aim of faster production, fewer materials and improved reliability over time.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HW4\u2019s development therefore represented <strong>an intermediate step towards AI5<\/strong> and an example of Tesla revisiting <strong>processes as well as products<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"viewer-5d2qs1529\">\ud83d\udcb6 REFERRAL PROGRAMME <strong>\ud83d\ude98<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"viewer-ipsth1016\"><strong>Get a benefit when buying your new Tesla! <\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Click the following link to apply the referral<\/strong> and order the car through the normal purchase process (or copy and paste it into Google):<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.Teslhub.com\/Vantaggio\" target=\"_blank\" rel=\"noreferrer noopener\"><em><strong><mark class=\"has-inline-color has-vivid-red-color\">https:\/\/www.Teslhub.com\/Vantaggio<\/mark><\/strong><\/em><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc4f That\u2019s it!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The referral link is also available in our bio under \u201cBuy a Tesla\u201d and in our website menu under the same heading.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf10 STAY UP TO DATE \ud83d\udce2<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-rt1g63713\">If you do not want to miss any news, these are great places to stay up to date.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-tkweb5791\">Join <a href=\"https:\/\/t.me\/TeslHubChat\" target=\"_blank\" rel=\"noreferrer noopener\"><u>Teslhub Members<\/u><\/a>: a whole community on Telegram to talk, ask questions and share Tesla experiences with us and other members. Find us on <a href=\"https:\/\/whatsapp.com\/channel\/0029VaJSGcjE50UruhIaxc1S\" target=\"_blank\" rel=\"noreferrer noopener\"><u>WhatsApp<\/u><\/a> too!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-e4l051952\">Enjoy the rest of your day. See you in the next article or on our <a href=\"https:\/\/link.me\/teslhub\" target=\"_blank\" rel=\"noreferrer noopener\"><u>social channels<\/u><\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-fn5gj33279\">Until next time!<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"viewer-fi8kz453\"><strong>Giorgio Rebecchi<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-qi7l4119892\"><em>Editor<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>Green\u2019s analysis, discussed in November 2025, identified fewer connectors, RTC batteries and a separate grounding cable in revised HW4 hardware. The report considered manufacturing implications and AI5 expectations.<\/p>","protected":false},"author":3,"featured_media":4567,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72],"tags":[],"class_list":["post-4460","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-veicoli-tesla"],"_links":{"self":[{"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/posts\/4460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/comments?post=4460"}],"version-history":[{"count":4,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/posts\/4460\/revisions"}],"predecessor-version":[{"id":4865,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/posts\/4460\/revisions\/4865"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/media\/4567"}],"wp:attachment":[{"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/media?parent=4460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/categories?post=4460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/teslhub.com\/en\/wp-json\/wp\/v2\/tags?post=4460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}