<div layer1="text-s"></div><div class="tz-paragraph">&nbsp;&nbsp;周末开车，手机热点忘了关，路上又堵车，结果SYNC系统自动更新了，由原车的3.3升级到了3.4，地图是217。升级后的颜色看起来实在是不喜欢，地图字体也变得巨大，想要降回3.3系统，请问该怎么操作。在此谢过！</div><div layer1="text-e"></div><br /><div layer1="img-s"></div><div class="tz-picture"><img src="http://club2.autoimg.cn/album/g27/M0A/E9/E0/userphotos/2020/09/16/09/500_ChwFkV9haOiARMycAAEPwR6vKyw398.jpg" style="height:525px;width:700px"  /></div><div layer1="img-e"></div><br /><div layer1="img-s"></div><div class="tz-picture"><img src="http://club2.autoimg.cn/album/g29/M03/DA/34/userphotos/2020/09/16/09/500_ChwFk19haP2AFDH7AALKHSDEj8U097.jpg" style="height:525px;width:700px"  /></div><div layer1="img-e"></div><br />

SYNC降级问题请教