My 2010 VW Routan has had a high pitch squealing noise coming from the engine ever since I got it. The noise is when I am driving not upon acceleration. I have taken it to the dealership numerous times and have had NO luck on fixing the problem. All they say is that it may be coming from the air intake but they don't know how to fix the problem. Any suggestions?
This is going to be a tough one. First from what has been said the noise is only when moving. If the dealer says they think it might be the intake I would make some change to see if the noise goes away or just gets different; remove the air intake ahead of the filter and drive the car. Since the noise is only when moving at the shop where I work we have a rack that can support the vehicle so it can be run or driven to see if the noise is from the drive train (transmission, drive, axles, etc). If none of these change the noise I might suspect it is wind whistling through some area in the front of the vehicle; to see if this might be the problem one thing I might try is to pop the hood so it’s open to the secondary latch, drive the car again slowly and see if the noise changes or goes away. If it does, I would get some 2"blue masking tape and start taping off seams and areas on the front to isolate the problem. Sorry the dealer cannot seem to find this issue I would be persistent and possibly contact the customer assistance line at VW America. I wish you well. My 1998 Chevy Venture suddenly wouldn't shift gears, the lever does not engage, it just goes up and down.
This is a front wheel drive I assume, that being said a good visual inspection is warranted. I would first open the hood, the trans-axle is on the left or drivers side there will be a cable that operates the selector lever which should be visible fairly easily without removing anything; have a helper move the selector and see if the cable moves. If it does the problem is likely the internal trans-axle. That might be time for a pro, if nothing moves go to the inside in the drivers foot well and see if there hush panel under the dash; remove it and look for the cable, it should come through the firewall and attach to the steering column. Make sure it is attached to the lever coming out of the column. If it is, move the selector and observe what happens. If nothing happens the trouble is in the column, but this is rare. Most likely you will find the trouble in the cable or connections. When I lock the doors on my 2004 Nissan Maxima the "chirp" no longer sounds...I cannot figure what to replace...the doors lock fine.
Unfortunately I cannot find any information that says the alarm chirps. The alarm system is controlled by the body computer module. If the horn sounds on and off when the alarm is triggered and the headlights flash the system is considered okay by all the information I can get at this time. Sorry I cannot help. One last thought was an aftermarket system installed? One not made by Nissan? If so you might want to get in touch with the people who installed it.