RX 350 Rattling/Knock sound
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Driver School Candidate
Joined: May 2020
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From: NC
RX 350 Rattling/Knock sound
7.0.1Hi all,
First time posting so I hope I’m not breaking any rules. I hear a rattle is my 2008 RX 350. I had the car check by a mechanic I trust prior to buying and he told me mechanically the car was immaculate. I specifically asked about the suspension and he said it was great. So a day later I hear a slight rattle over 40 mph. Doesn’t get worse over bumps and still makes the sound when not hitting the gas. Driving around corners it doesn’t get worse. It almost sounds like a plastic rattle But a little deeper maybe like a knock. Here’s a video
any advice would be greatly appreciated
First time posting so I hope I’m not breaking any rules. I hear a rattle is my 2008 RX 350. I had the car check by a mechanic I trust prior to buying and he told me mechanically the car was immaculate. I specifically asked about the suspension and he said it was great. So a day later I hear a slight rattle over 40 mph. Doesn’t get worse over bumps and still makes the sound when not hitting the gas. Driving around corners it doesn’t get worse. It almost sounds like a plastic rattle But a little deeper maybe like a knock. Here’s a video
Lexus Fanatic
Joined: Oct 2003
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From: Virginia/D.C. suburbs
Welcome to CL as a first-time poster. 
A lot of questions like that are posted in Car Chat, but we also have a Maintenance form and Model-Specific forums for each generation of RX.
Could (?) be a rattle in the rear hatch-lid hardware.....that is quite common as hatchbacks and wagons age.
Do you hear any rattles under 40 MPH? If not, then it could also be related to the wind (which gets stronger as the vehicle goes faster) rattling something like a loose piece of trim or hardware.
A lot of questions like that are posted in Car Chat, but we also have a Maintenance form and Model-Specific forums for each generation of RX.
I hear a rattle is my 2008 RX 350. I had the car check by a mechanic I trust prior to buying and he told me mechanically the car was immaculate. I specifically asked about the suspension and he said it was great. So a day later I hear a slight rattle over 40 mph. Doesn’t get worse over bumps and still makes the sound when not hitting the gas. Driving around corners it doesn’t get worse. It almost sounds like a plastic rattle But a little deeper maybe like a knock. Here’s a video https://youtu.be/NtI701u_PfM any advice would be greatly appreciated
Do you hear any rattles under 40 MPH? If not, then it could also be related to the wind (which gets stronger as the vehicle goes faster) rattling something like a loose piece of trim or hardware.
Thread Starter
Driver School Candidate
Joined: May 2020
Posts: 2
Likes: 0
From: NC
Welcome to CL as a first-time poster.
A lot of questions like that are posted in Car Chat, but we also have a Maintenance form and Model-Specific forums for each generation of RX.
Could (?) be a rattle in the rear hatch-lid hardware.....that is quite common as hatchbacks and wagons age.
Do you hear any rattles under 40 MPH? If not, then it could also be related to the wind (which gets stronger as the vehicle goes faster) rattling something like a loose piece of trim or hardware.
A lot of questions like that are posted in Car Chat, but we also have a Maintenance form and Model-Specific forums for each generation of RX.
Could (?) be a rattle in the rear hatch-lid hardware.....that is quite common as hatchbacks and wagons age.
Do you hear any rattles under 40 MPH? If not, then it could also be related to the wind (which gets stronger as the vehicle goes faster) rattling something like a loose piece of trim or hardware.
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