Took my 4runner in because check engine light was on, I knew it had thrown a code for the downstream o2 sensor about 6 weeks ago and it was likely the same reason. Unfortunately I didn't look closely enough at the estimate or just wasn't paying attention because I didn't notice it was $120 just to hook the car up to their scanner and get the check engine light code and diagnose the issue, nor was this amount taken out of the cost to install a new o2 sensor. I could have gotten this done for much less at the other shop I go to (no separate fee for check engine light diagnosis). Live and learn. On a positive note the service was good as always, and done very fast. I'll continue to come to B&W just not when my check engine light comes on.Also, big fan of the environmental upgrades (solar panels, lights off during mid-day) the shop is making.