My 2007 VW Jetta just started making a noise.


Asked by lh271 Apr 24, 2012 at 05:14 PM about the 2007 Volkswagen Jetta Wolfsburg Edition

Question type: Maintenance & Repair

My 2007 VW Jetta just started making a noise.  It sounds like it is revving up and then it goes away.  It only happens when my A/C is on and my car is not in gear.  So if I'm stopped at a red light.  I feel a slight vibration when it happens as well. No warning lights or any other issues.  Never made this sound before. Anyone hear of this before?  

10 Answers

Jon Keachie

is the RPM gauge actually reving up ? it is normal for the rpm's to decrease slightly when the AC is engaged and increase when disengaged, this will also engage your electric cooling fan/fans this will effect the rpm's as well. The AC compressor will disengage and re-engage when the AC is on if your fan belt is worn it may make a sound like you described. The slight vibration you feel is most likely the compressor engaging after is cycles threw the compression stage. If you can have your hood open with the AC on watch the compressor when it cycles threw on/off you should be more able to pin point the noise your hearing.

1 out of 1 people think this is helpful.

Hi Jon, Thanks for the response. the RPM doesn't actually move. It just sounds like it is revving up. Not sure what the heck is going on with it, but its stressing me out. I haven't had any issues with this car and I sure do not want to start now! I don't know where the "compressor" is located. Sorry, I'm a girl that doesn't know much about cars, hence why I'm online asking the questions! :) Sorry, Thank you.


Also, the engine block was shaking way more than normal and we thought it may be the plugs or have to do w/ the fuel air sensor(?) We disconnected the battery for about a day to reset comp as some forum stated it could fix the issue. While the car is running somewhat better, it still seem to have a tick that wasn’t that noticeable before. and still sounds like it is revving up and then down when the A/C unit is on, however the RPM's do not move. Thank you!

1 out of 1 people think this is helpful.
Jon Keachie

sounds like your hearing the electric cooling fan or fans (sometimes 2) some have a mufti-speed function that will speed up randomly and slow down this would make a sound similar to what u described. Wouldn't hurt to do a tune up if you have 80,000kms or 50,000 miles since your last tune up. For peace of mind just pull into a vdub dealer and ask the service manager if he could have a quick listen and then get the car to make the noise u hear while he is there right away he will know, tuff to diagnose over MB's good luck

1 out of 1 people think this is helpful.

Thanks for your help Jon!!

1 out of 1 people think this is helpful.
Jon Keachie

let me know once you figure out what it is I'm curious to know what the noise is. Cheers!


I am having the same issue however, it only makes the sound when I am driving. The a/c does not have to be on and the rpm's are normal. All my gages are normal as well.

Matthew Barrick

Yep having same problem and its a 2007 im think its the thermostat


There are two cooling fans, one for the cooling system, the other for the A/C. Try looking at the cooling fan when the engine is warmed up. It will cycle on and off to help maintain the engine temperature. The fan should be running very smoothly. The same goes for the other fan. Check the other fan by turning on the A/C. It will also cycle on and off as the pressure in the A/C system fluctuates.The fan should also be running smoothly.


The noise complaint only heard while driving is probably not related to the original poster's complaint. He may have a bad wheel bearing. The engine cooling fans can go bad in the Jetta, causing the noise and vibration. There will be fault codes present in the system to indicate whether one or both coolant fans are faulty.

Your Answer

Add photo

Related Questions

  • 2002 jetta turns over but won't start why ? 7 answers

    my 2002 vw jetta turns over but won't start what could be the problem ?

    2002 Volkswagen Jetta GLS 1.8T


    Maintenance & Repair

  • Disarming the alarm system for a 95 VW Jetta 23 answers

    Our son bought a 1995 VW Jetta. As he was working on the vehicle he set off the anti-theft system. Now the car will not start and we have been unable to trace how to disarm it. The car did not come...

    1995 Volkswagen Jetta


    Maintenance & Repair

  • Why is my 2005 vw jetta randomly making a rattling/almost grinding vibrating noise? 3 answers

    I just noticed recently that my 2005 vw jetta is making a weird random noise. At first I noticed it when I would turn my wheel when stopped, then I noticed that it will sometime make it when I pu...

    2005 Volkswagen Jetta 2.5L


    Maintenance & Repair

  • Speeding up BEEPING noise? 1 answer

    Hello- I have a 2007 VW Jetta 2.5L. Among all of the problems I have had recently with my car, this is a new one. Every now and then when slowing down or coming to a stop.. I hear this faint beepin...

    2007 Volkswagen Jetta 2.5L


    Maintenance & Repair

  • how hard is to remove starter for cleaning on Jetta 2.5, 2007 1 answer

    Starter is making noise. Do I need to replace it or just clean it?

    2007 Volkswagen Jetta 2.5L


    Maintenance & Repair

Looking for a Used Jetta in your area?
CarGurus has 30,332 nationwide Jetta listings starting at $1,199.

Search Volkswagen Jetta Questions

Volkswagen Jetta Experts

#1 FordNut
Reputation 1,260
#2 Goodwrench707
Reputation 1,150
#3 Tom Demyan
Tom Demyan
Reputation 990
View All

Related Models For Sale

Used Volkswagen Passat"
443 Great Deals out of 20,362 listings starting at $1,200
Used Honda Civic"
748 Great Deals out of 61,650 listings starting at $399
Used Volkswagen GTI"
140 Great Deals out of 5,428 listings starting at $2,995
Used Volkswagen Golf"
79 Great Deals out of 3,499 listings starting at $1,400
Used Honda Accord"
1,053 Great Deals out of 71,284 listings starting at $1,491
Used Toyota Camry"
1,246 Great Deals out of 78,098 listings starting at $1,450
Used Volkswagen Beetle"
292 Great Deals out of 9,243 listings starting at $995
Used BMW 3 Series"
994 Great Deals out of 37,630 listings starting at $1,500
Used Toyota Corolla"
853 Great Deals out of 57,786 listings starting at $2,200
Used Nissan Altima"
1,033 Great Deals out of 72,710 listings starting at $400
Used Audi A4"
255 Great Deals out of 11,572 listings starting at $1,995
Used Mazda MAZDA3"
341 Great Deals out of 22,706 listings starting at $1,000
Used Ford Focus"
1,213 Great Deals out of 69,504 listings starting at $1,200
Used Ford Mustang"
690 Great Deals out of 37,655 listings starting at $1,800

Used Cars For Sale

2015 Volkswagen Jetta For Sale
29 Great Deals out of 5,237 listings starting at $12,990
2014 Volkswagen Jetta For Sale
166 Great Deals out of 4,162 listings starting at $8,999
2013 Volkswagen Jetta For Sale
138 Great Deals out of 3,204 listings starting at $8,991
2012 Volkswagen Jetta For Sale
163 Great Deals out of 3,324 listings starting at $6,995