# How long does it take to flash my ECU?

<span lang="EN-US">The writing speed is dependent on a number of factors. The way we write to the car it goes as fast as the ECU/Gateway will allow. We have always put stability over speed but fortunately with the final closed beta developments we made a huge improvement in terms of flash success rate (<span style="text-decoration: underline;">we have yet to see a single failed flash due to response times since this was implemented</span>).</span>

<span lang="EN-US">A rough example of flash times for the supported ECUs are listed below. The final time can vary between car models which use the same ECU type.</span>

<table border="1" id="bkmrk-edc17cp14-20-minutes" style="border-collapse: collapse; width: 100%; border-width: 1px; border-style: none; height: 180px;"><colgroup><col style="width: 20.37037%;"></col><col style="width: 79.62963%;"></col></colgroup><tbody><tr style="height: 35px;"><td style="height: 35px;">**<span lang="EN-US">EDC17CP14</span>**</td><td style="height: 35px;">2<span lang="EN-US">0 minutes (2mb), </span><span lang="EN-US">40 minutes (4mb)</span>

</td></tr><tr style="height: 29px;"><td style="height: 29px;">**<span lang="EN-US">EDC17C46</span>**</td><td style="height: 29px;"><span lang="EN-US">15 minutes (some models with newer gateways are faster)</span></td></tr><tr style="height: 29px;"><td style="height: 29px;">**<span lang="DE">EDC17C64</span>**</td><td style="height: 29px;"><span lang="DE">8 minutes</span></td></tr><tr style="height: 29px;"><td style="height: 29px;">**<span lang="DE">EDC17C74</span>**</td><td style="height: 29px;"><span lang="DE">8 minutes</span></td></tr><tr style="height: 29px;"><td style="height: 29px;">**EDC17CP44**</td><td style="height: 29px;">20 minutes (longer/double in dual ECU vehicles)</td></tr><tr style="height: 29px;"><td style="height: 29px;">**EDC17CP54**</td><td style="height: 29px;">15 minutes</td></tr></tbody></table>

<p class="callout warning">For your first time using the application we would always recommend that you allow more time than you need.</p>