very witty fellow canuck
2014 lexus is350 thumping in trunk when driving
Thread Starter
Driver School Candidate
Joined: Jun 2014
Posts: 16
Likes: 0
From: nj
2014 lexus is350 thumping in trunk when driving
Hey all,
model: 2014 IS350 F sport AWD
Wondering if anyone else has this issue. When I go over a medium sized bump at moderate speeds, there is a loud thump coming from the trunk area. My trunk is empty and everything looks fastened down securely. I can not figure out what it is. The only thing I notice when I check the trunk, If i hit the center of the floor board, it imitates the sound almost identically. I checked the spare tire... everything..
In my trunk is the floorboard and the lexus carpeted mat. Maybe something else is missing?
Anyone else noticing this noise?
Thanks Ryan
model: 2014 IS350 F sport AWD
Wondering if anyone else has this issue. When I go over a medium sized bump at moderate speeds, there is a loud thump coming from the trunk area. My trunk is empty and everything looks fastened down securely. I can not figure out what it is. The only thing I notice when I check the trunk, If i hit the center of the floor board, it imitates the sound almost identically. I checked the spare tire... everything..
In my trunk is the floorboard and the lexus carpeted mat. Maybe something else is missing?
Anyone else noticing this noise?
Thanks Ryan
Instructor
Joined: Dec 2013
Posts: 931
Likes: 82
From: Tennessee
Read this thread and try the parking brake trick and see if that fixes it.
https://www.clublexus.com/forums/is-...4-is-350f.html
https://www.clublexus.com/forums/is-...4-is-350f.html
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Thread Starter
Driver School Candidate
Joined: Jun 2014
Posts: 16
Likes: 0
From: nj
Tried the parking brake and it didn't work. I'll take a look at the trunk stuff again. Can someone verify something for me please. The trunk should have the Lexus logo carpet on top then another lining piece below the carpet and that's it correct? I want to make sure I'm not missing a piece
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Driver School Candidate
Joined: Oct 2013
Posts: 33
Likes: 0
From: Miami-FL
Check your rear shocks for abnormal residue when compared to the others. I had a factory blown driver rear shock within 8k miles. Made a thud when I went over bumps because the car was bottoming out.
Another way is load the back with passengers and go over a speed bump, if its more noticeable definitely check your shocks.
Good luck.
Another way is load the back with passengers and go over a speed bump, if its more noticeable definitely check your shocks.
Good luck.
Driver
Joined: Mar 2005
Posts: 161
Likes: 0
From: France
Hi Ryan,
Yes this problem has been reported to Lexus since late 2013.
It happens on F-Sport IS with regular suspension only. According to the dealer, it looks to be related some way or another to too stiff dampers.
Depending on the car, the noise can be very loud.
The answer we got from Lexus France was : "works as designed, the cars comply with Lexus factory standards" .
That's a design flaw and as such, dealers cannot do anything about it. That's where we stand today.
I just cannot understand how Lexus could let this problem heavily impact on the brand reputation.
As per today, the only choice left to us over here is to sell the car. (one already did it).
I'm pretty sure Lexus Japan will come up with afix one day, the question is ... when ?
Yes this problem has been reported to Lexus since late 2013.
It happens on F-Sport IS with regular suspension only. According to the dealer, it looks to be related some way or another to too stiff dampers.
Depending on the car, the noise can be very loud.
The answer we got from Lexus France was : "works as designed, the cars comply with Lexus factory standards" .
That's a design flaw and as such, dealers cannot do anything about it. That's where we stand today.
I just cannot understand how Lexus could let this problem heavily impact on the brand reputation.
As per today, the only choice left to us over here is to sell the car. (one already did it).
I'm pretty sure Lexus Japan will come up with afix one day, the question is ... when ?