Does the 2007 Lexus ES350 have a timing belt? Or chain?

The engine for the 2007 Lexus ES350 has a timing chain not timing belt ( which should reduce the cost of your service, FYI). I would suggest changing the transmission fluid and brake fluid even if Lexus doesn't recommend it at 90k.

Hello your vehicle has a timing chain not a timing belt and this service cost can be found on REPAIR PAL.COM and it should cost less not having to replace the timing belt.HAVE A BLESS DAY from DR. RECO.

According to my mechanic, the timing chain generally does not need to be changed for a long time unless something extraordinary happens. Generally, timing belts get changed around 90K - 100K depending upon the car. However, a timing chain needs to be changed if the chain gets 'stretched' or loses tension. Personally, I am not sure how I would know that. I believe a good mechanic can 'hear' it as the engine REVs or he would simply know your car over time. Alternatively, I would say let your mechanic periodically drive your car around the block, so to speak, once it crosses the 100K mark.