<div layer1="text-s"></div><div class="tz-paragraph">买的X5&nbsp;28i,后经同事提醒才发现代原厂胎气门嘴是胶的。<br />请教下有没有必要换！</div><div layer1="text-e"></div><br /><div layer1="img-s"></div><div class="tz-figure"><img src="http://club2.autoimg.cn/album/g6/M0B/79/54/userphotos/2016/10/17/20/500_wKgH3FgEyeKAGYIJAABZ4e4qweQ509.jpg" style="height:248px;width:301px"  /><div layer2="desc-s"></div><div class="description">就是这个</div><div layer2="desc-e"></div></div><div layer1="img-e"></div><br /><div layer1="img-s"></div><div class="tz-figure"><img src="http://club2.autoimg.cn/album/g10/M00/79/2C/userphotos/2016/10/17/20/500_wKjBzVgEye2Ac1R_AAEBKfmxIuo473.jpg" style="height:420px;width:700px"  /><div layer2="desc-s"></div><div class="description">说的好像很好</div><div layer2="desc-e"></div></div><div layer1="img-e"></div><br /><div layer1="img-s"></div><div class="tz-figure"><img src="http://club2.autoimg.cn/album/g7/M08/7A/94/userphotos/2016/10/17/20/500_wKgH3VgEyf6ALJROAAE5rueN4MI485.jpg" style="height:458px;width:700px"  /><div layer2="desc-s"></div><div class="description">真的要换吗？</div><div layer2="desc-e"></div></div><div layer1="img-e"></div><br />

换铝质气门嘴有什么好处吗？