Koru_Kinshi

I'm hearing this buzzing sound when the car turns on, and on occasion when I'm at a stop. Sounds like it's coming from the left side of the engine, which leads me to believe it's an IC pump.

Now, seeing as I have a warranty, should I just let them handle it, or should I upgrade the pump? I'm not really interested in getting a bigger heat exchanger, yet.

ML500K

The ic pump is actually on the passenger side, below the smog pump.
Fwiw, the HE lowers the intake temps quickly and is def worth it. Just FYI, The stock held about 500 cc of liquid while the HE from EC for example held about 1200-1300cc. Also the bigger cores.

Koru_Kinshi

The noise is on the passenger's side. I meant left side when facing the hood, heh.

ML500K

If you do get the OEM pump, make sure the part no. is A000 500 03 86
its the "newer" version of the IC pump.

Dingleberry

could be the secondary air pump too

320 dreamer

no need to upgrade to aftermarket i/c pump if you arent incresing the size of the h/e. when your ready go big!! my h/e is 26" w x 16" t x 1" wide. neve have any shutdown issues after the install

ML500K

iirc the 2nd pump failures will throw a dtc code...since you have warranty, have your workshop/dealer hook up to star and have a look.