I just completed the spark plug change on my wife's '07 RX350. As the numerous threads on this topic point out, this is one serious undertaking. I'm not claiming to be a mechanic but have done my share of DIY's including changing the usual oil/filter, brake discs/pads, serpentine belt, rear hatch switch and now the spark plugs on my wife's car and the same or similar on all of my other cars. This has got to be the single most difficult project that I've tackled recently. I did fail to do the front Mac struts but this was because I didn't appear to have the right spring compressor. Go figure.

Anyhow, I found that I needed to remove the front windshield cowl to get access to that infamous third stay bolt. I could not have got it off otherwise and cannot figure out how anyone could get it back on with the cowl still on. I guess that I have fat forearms.

To my question ... I managed to break off the tabs that lock the connector to the ignition coil on about three spark plugs. I'm concerned about these eventually vibrating off. Should I be concerned about this? Do I need to now go in and change these? Or, tie-wrap then in place? Thoughts?

Thanks in advance.

 

you generally have two options , first you can buy those connectors from lexus or what i do because this is very common and almost unavoidable is to use silcone rtv and just dab the in side ( the sides) and install onto coil and its fine.

 

or put a small amount of rtv on the sides of the coil where it touches the connector