Q: Do you foresee any problems if I decide to buy a 2007 Audi A3? What are the major repairs I should be worried about?

Hello. The whining noise you are hearing is typically from the pilot bearing located at the rear of the crankshaft. It can be an internal transmission issue but that is not as common. I typically check and even change the...

I would start with checking the O2 sensor (https://www.yourmechanic.com/services/oxygen-sensor-replacement). This is what relays exhaust gas changes to the vehicle's computer. When this sensor is not working correctly, incorrect or misdiagnosed air/fuel mixtures are relayed to the vehicle's computer causing incorrect...

The noise and burning smell (https://www.yourmechanic.com/services/smell-in-the-car-inspection) is most likely from the alternator (https://www.yourmechanic.com/services/alternator-replacement). Have the battery (https://www.yourmechanic.com/services/battery-replacement) checked to make sure it is okay. Once that is done, check and replace the alternator (https://www.yourmechanic.com/services/alternator-replacement) if necessary. If you need some...

This can happen for many reasons, however usually a loud pop or backfire is a sign of a lean fuel condition or an ignition timing problem. A lean fuel condition can be caused by a faulty mass air flow sensor...

Hi there. Seems that the troubleshooting is leading to the transmission. When the vehicle goes into drive or reverse, if the transmission is lock up or the converter clutch is active, the engine will stall. When tapping on or turning...

There are a couple of things that usually will produce a whining noise from the drive belt area. A failing water pump (https://www.yourmechanic.com/services/water-pump-replacement) will produce a whining noise, which will typically be accompanied by overheating or coolant leaking as a...

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds...

If you just cranked over the engine a few times with no oil in it would not cause any issues except you would not have any oil to timing chain tensioners and may have caused the timing chain to jump...

Hi Mike. Thanks for contacting us today. Any high temperature sealant will work the same on head gaskets and valve covers. As long as you've already completed the head gasket replacement and the cylinder head or engine block is not...