Noise on cold start

10

Asked by Mar 16, 2014 at 09:38 AM about the 2003 Volkswagen Passat GLX 4Motion

Question type: Maintenance & Repair

Recently purchased a 2003 VW Passat GLX 4 Motion for my teen driver.  Have noticed
that upon a cold start the car makes an unusual noise near the front of the engine.  Lasts
for only about a minute or two and then stops.  Almost sounds like some type of
electronic sensor or something is warming up and then shuts off.  Doesn't appear to be
coming from any belts and serpetine belt has already been replaced.  Is this a normal
function on the Passat.

6 Answers

26,035

The car is 10 years old- you rule out belts- could be a bearing going out, alternator or tensioner bearing- hard to tell from here without hearing it- if the car is running ok, just run it until the noise gets louder- if it worries you, (like it should) just take it to a pro and have him/her listen- a 10 year old VW will need a good mechanic if you don't already have one

1 people found this helpful.
705

Most likely the Secondary Air Injection Pump turning on and then turning off. It runs during cold starts to lean out the rich air fuel mixture in the exhaust, which helps your cat function more efficiently.

6 people found this helpful.
10

Thanks Armaan....the scenario you are describing makes good sense. It sounds like it something normal occurring during start up because it turns on and off within a minute of starting the engine. I would think if there were a severe issue it would continue to make the noise more frequently on start ups and last longer.

1 people found this helpful.
705

Not a problem! Yes if there was a problem it would not occur with such consistency. Enjoy the car!

1 people found this helpful.

I have the same problem same sound that bucknuts14 is talking about, but I have a 2014 passat Wolfsburg edition. Car only has 28000 miles. If the car is warm I don't hear the sound on start up but if it is cold I hear it until to the car is warm. Can anyone one help me?

my mechanic said it is the tensioner (cost $ 250) and if neglected it may start leaking oil.

Your Answer:

Passat

Looking for a Used Passat in your area?

CarGurus has 22,755 nationwide Passat listings starting at $1,299.

ZIP:

Volkswagen Passat Experts

  • #1
    tenspeed
    Reputation
    1,550
  • #2
    Tom Demyan
    Reputation
    1,500
  • #3
    Chrisand Edwards
    Reputation
    1,480
View All

Related Models For Sale

Used Volkswagen Jetta
473 Great Deals out of 27,540 listings starting at $1,500
Used Honda Accord
686 Great Deals out of 101,993 listings starting at $999
Used Toyota Camry
859 Great Deals out of 70,688 listings starting at $1,000
Used Audi A4
175 Great Deals out of 9,643 listings starting at $1,400
Used Nissan Altima
840 Great Deals out of 61,663 listings starting at $1,000
Used BMW 3 Series
1,012 Great Deals out of 30,053 listings starting at $900
Used Honda Civic
491 Great Deals out of 44,267 listings starting at $1,150
Used Hyundai Sonata
523 Great Deals out of 46,517 listings starting at $1,200
Used Volkswagen GTI
72 Great Deals out of 5,309 listings starting at $2,500
Used Mazda MAZDA6
172 Great Deals out of 13,228 listings starting at $1,000
Used Chevrolet Malibu
621 Great Deals out of 50,838 listings starting at $600
Used Volkswagen Golf
63 Great Deals out of 4,768 listings starting at $1,500

Used Cars For Sale

2018 Volkswagen Passat For Sale
8 Great Deals out of 8,994 listings starting at $14,400
2017 Volkswagen Passat For Sale
43 Great Deals out of 2,021 listings starting at $12,399
2016 Volkswagen Passat For Sale
13 Great Deals out of 852 listings starting at $8,690
2015 Volkswagen Passat For Sale
128 Great Deals out of 3,494 listings starting at $6,985
2014 Volkswagen Passat For Sale
95 Great Deals out of 2,458 listings starting at $5,600

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.