Q: hissing sound when accelerating - 2014 Volkswagen Tiguan

asked by on September 06, 2016

I recently bought a Tiguan with 9000 miles on it. Whenever I accelerate it makes a hissing sound. It's not like a turbo whistle, since it is turbo 4 cylinder. It sounds like 'ssss' for half a second like it's letting off steam in the air, kind of like a truck sounds. Does this sound serious? Should I take it to the repair garage?

Car is making a noise Inspection $94.99 - $114.99 Get a Quote

Hello. The sound you are hearing is most likely a vacuum or intake manifold leak. The vacuum created by the engine is crucial for proper intake of fuel and air, as well as the combustion inside of the chamber. Now the intake manifold for that air coming in and being mixed with the fuel can also make a sound if there is a leak. The vacuum is sucking in the air and any hole or gap will likely make noise during that process. You will want to get this looked at. Depending on the severity of the leak, you will most likely see an increase of power. To have this diagnosed, a certified professional, like one from YourMechanic, can come to your car’s location to inspect the sound and let you know what needs to be repaired.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do you use the vanity mirror?
Your car is equipped with a vanity mirror on both the driver and passenger side. These provide convenience, but should not be used when driving (the driver side mirror). Here’s how to use them: Flip the sun visor down. Open...
Check Engine light coming on and car bucking.
A flashing check engine light (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) is a warning that there is a misfire in the engine that will damage the catalyst in the exhaust. The catalyst is what cleans up the exhaust emissions that come out of your engine....
Transmission slipping
The first thing to check is the fluid level. Park the car on a level surface with the transmission in Park, and the engine running. The dipstick for the transmission is red. Pull it out, wipe it off and take...
Car shaking on startup, engine revving
Hello there, a few different faults can cause the car to shake and have issues with acceleration. The most common would be the the spark plugs and wires, a fuel pump issue, faulty MAF sensor, a vacuum leak, or a...
Engine light flashing. Car not getting speed and putting out
The Check Engine Light is flashing to tell you that you should get to a safe stopping point so you do not damage the engine or the catalyst of the car. The Check Engine Light does not tell you what...
There's a smell when I drive my car is it the clutch? My car has 23000 miles.
Hi there: When a clutch is wearing out or gives off a smell, it's usually similar to rotten eggs or burning rubber if it's actual clutch disks. There will be other indicators such as slipping of the clutch once the...
Brake system, coolant leak, brake fluid leak ,wheel hub
All of these repairs are feasible. Brake systems can leak at a variety of points but the repairs are pretty straightforward. What I would suggest is you visit the YourMechanic (https://www.yourmechanic.com) Internet portal and request brake leak diagnostic and repair...
When a car doesn't want to shift, what sensor is it for on a Cadillac SRX 2005?
Hi there. There are three different types of sensors and solenoids that will cause a transmission to not shift. 1. --- Transmission Position Sensor (https://www.yourmechanic.com/services/transmission-position-sensor-switch-replacement) 2. --- Vehicle Speed Sensor (https://www.yourmechanic.com/services/speed-sensor-replacement) 3. --- Shift Solenoids (https://www.yourmechanic.com/services/car-does-not-shift-from-park-to-drive-inspection) All three types of...

Related articles

The Best Used Cars to Buy If You're a Personal Trainer
As As a personal trainer, you either operate out of a gym, or you go to your clients. Either way, you probably don’t have to haul any more gear than what fits into your gym bag, so your main focus...
How to Clean and Restore Headlights
Even Even owners who regularly clean and maintain their vehicles are not immune to wear on their headlights. As the vast majority of headlights are made of plastic, they require different care than other exterior surfaces of your car. Plastic...
How to Replace a Fog/Driving Light Bulb on Most Cars
Fog lights have a failing bulb whenever the lights are dim or flickering and when the lights go out altogether.