I have a 2006 RAV4 Sport V6 203,000 miles with some issues. Squeaking rear of the car intermittently mostly happens when I go over bumps that are high and when the car comes down it makes a squeaking noise. It is pretty annoying that I took it to the dealership and was willing to pay 129.99 (diagnose fee) USD to have them find the noise and maybe fix it but they could not find it. I change the struts on it a while back because one side of the structs was leaking oil. I went under the car and moved the exhaust and it squeak similar to that sound and I sprayed silicone spray on the hangers. Then I lifted the exhausted and no sound so I drove it on a bump and it squeaks. I thought it was the trunk door as some forums and put tape on the latch but that didn't help.

2nd issue is sometimes when I push the gas their is a delay in the acceleration and sometimes a small jolt. I changed the transmission fluid with Toyota fluid from dealership. Some called it acceleration lag some say it is shifting lag. I clean Mass airflow senor, changed air filter regularly, and throttle body.