AC176 Idle Air Control Valve

Installed on 2000 Jeep Grand Cherokee Laredo 4.0 to troubleshoot rough idle and stalling. Couldn't order MOPAR as it is discontinued but installed this as a replacement(53030821AB). Previously installed a cheap $11 TAMMKEN IAC which didn't clip into place, would idle rough in cold/hot/rainy weather, and finally gave out after 1 year warranty was up. After installing this part, test drive went well with AC on high blast, in Reverse, and idle. Noticeably ran much better. If you're handy, can be done in an hour. For easy access you'll need flathead, torx bit, and socket wrench. Unplug battery terminals and clean while they are off. Push IAC nipple in before install. Unclip(4) air intake filter housing, flathead screwdriver to loosen the intake hose connection, unplug 1 inch engine hose and another flathead to loosen the air intake housing, unclip 3 engine cables, remove 1 bolt to pull off the intake housing, unclip 3 sensors, and 4 more bolts(same size) to remove the throttle body. Lastly, 2 torx screws to remove the IAC sensor. Make sure it is installed in same direction(clip side facing driver's side). Reverse directions to put back together. Make sure gasket for throttle body is centered, can push in throttle body valve once installed to make sure its not catching the gasket. Will update review later on this year to see how durable the part is.

Excellent product, at a fantastic price. Auto parts stores wanted 3 times the amount i paid for it on Amazon. My Jeeps idle would drop down to 500 RPM while i was at stop, for lights, stop signs etc. So i did some research and found out i needed to change the Idle Air Control Sensor. It was easy to install and only took about 20 min. to do so. The old one was the original, and had 157,000 miles on it. And the old one was worn and pitted. Now my Jeep runs great without any idling problems. Thanks for a great product at a fantastic price.

got rid of my lingering high idle when the clutch was engaged. The only issue is the brand on the box/labels, were not "standard" or anywhere mentioned AC176. I was skeptical, but it works well and the fitment appears to be spot on. satisfied with purchase

When installing make certain the plunger is pushed Al the way in so it will start in the cold start mode. Easy install! Perfect fit and functions as it should.

I have had high rpms at start up and fluctuating rpms at idle for a while now so I bought a cheaper IAC. Needless to say it don’t fit right and it didn’t solve the issue leading me to look for vacuum leaks that weren’t there and this part solved in 5 min both issues I’m a complete idiot for not shelling out the money for the dependable part.

Absolute trash. Fell apart while trying to install. Do not buy!

Did not work after 6months

My 1998 Jeep Wrangler TJ was sometimes dying at idle and also would not fire when started for the first time after sitting. It would crank over until I smelled fuel. When I cranked the engine and pushed the gas pedal it would start. My old IAC was the culprit and this fixed it. The jeep should fire up and rev to 1500 rpm or so and then settle down to idle at 750ish after a minute or two. The IAC works by bypassing the throttle letting air into the engine intake when starting up because you are not pressing the gas pedal that's why I had to press in the pedal to start my jeep but now everything is working great. I recommend removing the throttle body to replace and cleaning it while your there. You will need a torx bit to remove the actual IAC from the TB.