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Toyota Sienna Noises, Rattles, and Squeaks

I have a 2007 Sienna LE with 10,000 miles on it.

I have this hum noise (no clicking or rattling) just constant pretty loud noise when accelerating.
It only happens when I am going at lets say 40 mph (about 65 km/hr) and engine is at 2000 rpm and then I accelerate so that the rpm goes to about 2500.
The noise gets lauder as it goes to higher RPM.

But note that when I am at 10 mph and engine at 2500 rpm, noice is not there. Similarly when I am driving at 70 mph and just cruising (rpm at about 2500), noise is not there.

It really only happens when accellerating at 3rd and 4th gear. Radio or any music that can interfere is off and I think the noise is lauder on the passenger side.

I went to the dealer and he told me that every sienna has this and the noise is coming from air intake (engine needs much more air when accelerating and that's the noise). I understand that more air is needed when accelerating but how come it doesn't do that when i am accelerating at 10 mph? and it's pretty laud, to the point where it makes me crazy.

What are your thoughts? Do other 2006/2007 siennas have this?

I will take it to the dealer again but I have a feeling they will say the same thing and I would like to go in with some ideas, more educated :)

Thanks in advance.


  • allezallez Posts: 13
    I have a 2007 Sienna XLE which gets noisy around 2000 rpm with accelerating. I also have not noticed it at slow speeds. It is a kind of metallic vibrating or resonating type of sound. It seems to occur in a relatively narrow rpm band, and does not occur while cruising. From what I've read it seems to be common and normal, although I will bring it up with my next oil change (I only have 3k miles on it.)
  • hause7hause7 Posts: 153
    Could one of you guys shoot a 0-60 video of your 07 Sienna? i have one on youtube of my 04 Sienna, but wanna see the new 07's power. Can someone please do one?
  • ateixeiraateixeira Posts: 72,587
    The 07+ Siennas have the 2GR 3.5l engine with a timing chain. There's no belt to change, but the trade-off is more reciprocating mass and more noise.

    Toyota did add some insulation to the firewall and to the door sills to compensate.

    Just a thought.
  • allezallez Posts: 13
    As long as the noise is normal that's fine - I'll take the extra power.
  • allezallez Posts: 13
    Could one of you guys shoot a 0-60 video of your 07 Sienna? i have one on youtube of my 04 Sienna, but wanna see the new 07's power. Can someone please do one?

    Sorry, not me. Plan to keep my car a long time . . .
  • the noise is making me crazy... it's a minivan - it should be quite so kids can sleep - just like in the commercial :)

    but on a serious note I am going to test drive new siennas to see if they have it too.

    If there is anyone else that knows more info about this noise, please share
  • I have the same noise on my Sienna LE and its becoming unbearable.(loud noise at three specific rpm’s and it's similar noise to engine struggling for power on an incline, worst is between 50 to 60 mph) I can assure you its NOT the lack of power here, as I am the only one in the minivan, with 3.5liter engine. It’s some kind of resonating from the engine. If I back off or accelerate form the resonating speed the noise goes away. If I stay at the speed the noise becomes louder and louder - never seen this before in my life and I have been driving for 15 years.

    I have taken it back to the dealer a number of times. The technicians have all confirmed the noise is excessive and have tried the following:
    Tightened air intake assy
    Changed the Exhaust system
    Replaced the Air intake assy
    Loosened all engine mounts and tried to adjust engine in cradle

    All the above DID NOT resolves the problem, so they reported to SE Toyota for their technical specialist to investigate.
    He arrived and confirmed noise was EXESIVE and I was informed that he was going to file with TOYOTA ENGINEERING and that there is NO fix currently available. He would NOT give me the reported reference number to Toyota Engineering.

    Since then I have spoken to Toyota and raised a Case number so I can update on the problem. But after few days they have contacted me and said there is NOTHING WRONG WITH SIENNA and that the noise inherent. I was NOT happy with the feedback and they have asked me to take up the dispute settlement program
    I am disgusted with the feedback as four Toyota technicians have all confirmed the noise is excessive (They would not be happy with this excessive noise in their car)

    I am not sure where to go from here!!!!! I wanted to work with them but they have washed their hands
  • Hi Anusha,
    Thanks for your message. Since my original post I took it to the dealer and they said nothing is wrong with that noise, they said all of them do that.
    I didn't have time to go for a test drive, but few days later I did take one of their new cars and noise was not there.

    So you are right, they are trying to cover things up here but I am surprised more people don't have this problem. It is really bad noise, and clearly something is wrong with it - i have a feeling that by the time it gets to 60,000 miles, the van will be a junk.

    I will now take this officially to the dealer and will try to update you - if you hear anything from them as well, please let me know.

    By the way, I am in Toronto, Ontario. What about you?
  • lweekslweeks Posts: 12
    My 04 Sienna has water condensation in right headlight I removed the bulbs & blasted with hair dryer for about 45 min., but it came back during !st rainfall.Dealer wants $600.00 to replace Any solutions out there? Lloyd
  • ateixeiraateixeira Posts: 72,587
    Must be a seal. Did you try to seal it up with silicone or something? Be very careful not to get any on the transparent areas, of course.
  • siennamisiennami Posts: 116
    First of all, let me say that I am sorry that you're having so much trouble with your vehicle. One thing I noticed when I test-drove this 2GR Sienna (not a 1998-2006) is that it is a NOISY little booger! In fact that is the first thing I noticed, as I drove a 2000 Sienna for three + years and never noticed that much engine sound. So, I am willing to guess that it's normal, unfortunately. I say this because not only did I test-drive one, but the one I currently drive is from a totally different dealership, and the engine sounds exactly the same. I am the only one who rides in or drives the car, so I've pretty much gotten used to it, along with a little hesitation on the turns. To me it's a trade off for a bigger engine. I can put up with the noise for that. 'Course, now I do like my country music up loud, too, so that might make a difference! :shades: I'm not trying to make light of your situation; I really enjoy driving the Silver Shadow, so of course I wish that everyone else's experience would be as positive as mine!

    Take care,
  • Hey,
    Thanks very much for your message. I guess we will have to get used to it as well, but what bothers me is that this noise is only happening at certain speed and certain rpm - it's just not right.

  • ateixeiraateixeira Posts: 72,587
    The 2GR V6 uses a timing chain, so it is indeed noiser than the 3.3l V6 predecessor (called 3MZ). Fair enough to get 266hp instead of 215hp.

    However, in Car & Driver tests, Sienna was still the 2nd most quiet van at cruising speeds.

    Toyota added sound insulation to the firewall and under the doors to compensate somewhat for the timing chains.

    Timing belts have a change interval, chains don't, so the 2GR is also lower maintenance.

    Here's a pic of the extra insulation from Toyota.
  • (thank you for the explanation, it looks like you know a lot about these cars, are you a mechanic?)

    in my mind these changes would have nothing to do with why there is _NO_ noise when driving 40 km with 2200 rpm vs driving 80 km with 2200 rpm with a weird NOISE.

    And most importantly, why this is not happening on all 2007 Sienna LE's - just very few.
  • ateixeiraateixeira Posts: 72,587
    You're not coming off that way at all, no worries...

    Sounds like something is out of spec with yours. See if you can get a tech to ride with you to demonstrate the noise under those conditions.

    Mine is quiet, so I haven't experienced what you describe. Knock on wood, it's been completely trouble free, though the dealer did forget to screw in my antennae at delivery.
  • It does should like you have allot of sienna knowledge. I traded my 2003 sienna symphony in this year for a 2007 Sienna LE. I do like the additional power and improved gas mileage but my engine has a rattle noise when cold. It sounds like a rod knocking or very loose lifters. Once it warms up the noise pretty much (not fully) goes away. The dealer said next time they may have to remove the valve covers to check valve lash. I've had problems with the power sliding doors closing automatically when they reach the full open position. It has almost caught my kids when they get in. I still like the sienna but I wish the limited ones weren't so expensive. rclonch. :surprise:
  • omleomle Posts: 1
    I too have excessive noise issues with my new 07 sienna. At idle, a low frequency rumble is heard (similar to a motor bike running but not as pronounced) and vibration in the front seats is felt. When accelerating, the seat vibration is fairly strong at about 1300rpm and the engine also exhibits a resonating harmonic sound. It is very annoying and I find myself driving my 1/3 the price chevy to avoid it. Taking it up with the dealer mechanics was fruitless saying it's normal as they can't figure out the problem. The fact is that it's not normal. I've driven a number of these vans on their lot and they acknowledged that other vans did not produce the same noise.

    I know it's not easy to isolate delicate issues like this. I need someone who understands the vehicle and how it's put together. I don't think a simple part change is going to fix it.
  • ateixeiraateixeira Posts: 72,587
    The good thing for you is that the LE models, for whatever reason, seem to get better mileage than the more loaded models. Mileage reports vary, but I've noticed a distinct advantage for the CE/LE models over the XLE/Limited ones.

    Weight? Tires? Not sure why, but that what I (and others) have observed.
  • siennamisiennami Posts: 116
    Now that's good news! I knew there had to be an advantage to driving a CE.... :shades:
  • yatzekcsyatzekcs Posts: 2
    Hi, I have the 2006 sienna CE and it drives me creazy. The thing will get so f.. loud at 2500 rpm's. Took it to the dealer, they reset the computer and that is about it. They just called back once to say that they are more ppl complaining about the noise and they are waiting for the fix from Toyota. It has been almost a year now. I tried another Sienna with the mechanic and it made the same noise. I want to get rid of it. I just can't drive a van that when going uphill wakes up everybody or that I have to adjust my driving to avoid 2500 rpm's. If anyone knows how to make Toyota to fix it or how to return it without loosing too much $$$ please let me know.
    This is my first and last Toyota.
    Jacek. :(
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