My 2007 VW Jetta just started making a noise.

45

Asked by 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

1,605

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 of 1 people found this helpful.
45

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.

45

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 of 1 people found this helpful.
1,605

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 of 1 people found this helpful.
45

Thanks for your help Jon!!

1 of 1 people found this helpful.
1,605

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.

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

40

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.

1,385

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 ? 17 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 30 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

  • 2004-2005 VW Jetta 2.0 GLS 8 answers

    Accidently deleted my question... I have the early model 2005 VW Jetta 2.0 GLS and whenever the car is cold it will not start on the first try. I bought the car in November 2016 and it always star...

    2005 Volkswagen Jetta GLS

    -

    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

Jetta

Looking for a Used Jetta in your area?

CarGurus has 40,941 nationwide Jetta listings starting at $950.

ZIP:

Search Volkswagen Jetta Questions

Volkswagen Jetta Experts

#1 Goodwrench707
Goodwrench707
Reputation 2,200
#2 Deathjam4
Deathjam4
Reputation 1,720
#3 Tom Demyan
Tom Demyan
Reputation 1,380
View All

Related Models For Sale

Used Volkswagen Passat
266 Great Deals out of 24,442 listings starting at $1,000
Used Honda Civic
656 Great Deals out of 88,604 listings starting at $995
Used Volkswagen GTI
69 Great Deals out of 6,965 listings starting at $1,995
Used Volkswagen Golf
60 Great Deals out of 2,881 listings starting at $1,995
Used Honda Accord
813 Great Deals out of 84,286 listings starting at $1,050
Used Toyota Corolla
783 Great Deals out of 73,832 listings starting at $1,995
Used BMW 3 Series
977 Great Deals out of 31,730 listings starting at $1,000
Used Toyota Camry
1,006 Great Deals out of 90,918 listings starting at $650
Used Audi A4
228 Great Deals out of 10,877 listings starting at $1,899
Used Nissan Altima
1,034 Great Deals out of 81,564 listings starting at $1,200
Used Mazda MAZDA3
229 Great Deals out of 31,863 listings starting at $1,495
Used Volkswagen Beetle
166 Great Deals out of 9,557 listings starting at $1,500
Used Ford Focus
543 Great Deals out of 57,172 listings starting at $1,095

Used Cars For Sale

2017 Volkswagen Jetta For Sale
11 Great Deals out of 24,647 listings starting at $10,867
2016 Volkswagen Jetta For Sale
65 Great Deals out of 2,180 listings starting at $9,825
2015 Volkswagen Jetta For Sale
70 Great Deals out of 2,985 listings starting at $7,250
2014 Volkswagen Jetta For Sale
110 Great Deals out of 4,125 listings starting at $4,999
2013 Volkswagen Jetta For Sale
55 Great Deals out of 1,568 listings starting at $4,994

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.