I have a 325i 2003 automatic, I hear a loud whistle when I reach around 3rpm and feel a stronger take off, but I cannot seem to find any turbo. Where do i need to be looking

Asked by Mar 04, 2013 at 08:06 PM about the 2003 BMW 3 Series 325i

Question type: Car Customization

14 Answers

995

i mean if the car is all stock then there is no turbo, only 3 series with a turbo is an M3, the whistle could be a hole or leak with ur intake....or ive heard that year BMW had some alternator issues with the tensioner

995

and that car does have an I6 so it does have a pretty decent amount of torque in that rpm range

Best Answer Mark helpful

The thing is im not sure if its all stock or not. It, does it as well when im in neutral, if i rev it up to redline as the RPM's jump up and down so does the whistling. I've had the car for over a year now and its always done this.

anything below 3-4ish though and you hear no whistle

995

http://www.youtube.com/watch?v=vgkcEr64d1s is it like this?

1 of 1 people found this helpful.
995

http://www.youtube.com/watch?v=ujWieLXQbgc or this

235

i would say that is has a turbo on it look around the altonator

325

the 335 is turbo charged, not the 325, not even the M3 {the newest version might be, but that is still speculation}

3,315

Considering the age of the vehicle, you could have a belt tensioner pulley bearing going out. Have you replace them? You could also have a water pump bearing that is starting to fail. It sounds like some routine maintenance may be in order. They go bad around 100K miles.

CJ I'd have to say sounds more like the 1st video exactly the same sound as i take off in the same fashion

995

hahah ive been looking all over for a solution to this, but seriously, a lot of people have been having the same problem....also no one really seems to know for sure, but all roads lead to it being the air intake, this guy claims to have fixed it: http://www.e46fanatics.com/forum/showthread.php?p=13844661...but it doesnt seem to be a serious problem...i thought it would have been a gasket problem, like a hole around the intake or exhaust manifold

3,315

Have you checked your bearings?

3,315

I thought the same thing at the same RPM and surprise! Time for pulleys and tensioners. Use a stethoscope or use a long screwdriver to detect vibrations coming from the tensioners.

225

Its just a cracked intake boot, very common on these cars, definitely not a turbo, as no E46 came with one. The stronger takeoff is just you getting into the power band.

Your Answer

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 31,335 nationwide 3 Series listings starting at $795.

ZIP:

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    4,920
  • #2
    Robert Charlson
    Reputation
    1,610
  • #3
    Matt Mankinen
    Reputation
    1,240
View All

Related Models For Sale

Used BMW 5 Series
462 Great Deals out of 16,477 listings starting at $2,000
Used BMW M3
51 Great Deals out of 1,469 listings starting at $4,990
Used Mercedes-Benz C-Class
601 Great Deals out of 23,245 listings starting at $1,995
Used Audi A4
314 Great Deals out of 10,721 listings starting at $900
Used Ford Mustang
765 Great Deals out of 42,128 listings starting at $1,300
Used Honda Accord
1,049 Great Deals out of 61,437 listings starting at $999
Used Mercedes-Benz E-Class
448 Great Deals out of 19,563 listings starting at $1,500
Used BMW X5
400 Great Deals out of 12,955 listings starting at $2,495
Used Chevrolet Camaro
421 Great Deals out of 31,631 listings starting at $2,395
Used BMW 7 Series
162 Great Deals out of 6,001 listings starting at $2,500
Used BMW 6 Series
88 Great Deals out of 2,784 listings starting at $5,980
Used BMW 1 Series
56 Great Deals out of 974 listings starting at $6,495
Used BMW X3
277 Great Deals out of 12,118 listings starting at $2,900

Used Cars For Sale

2017 BMW 3 Series For Sale
162 Great Deals out of 8,650 listings starting at $25,429
2016 BMW 3 Series For Sale
54 Great Deals out of 1,833 listings starting at $19,500
2015 BMW 3 Series For Sale
30 Great Deals out of 1,166 listings starting at $15,995
2014 BMW 3 Series For Sale
230 Great Deals out of 5,138 listings starting at $13,315
2013 BMW 3 Series For Sale
46 Great Deals out of 1,603 listings starting at $10,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.