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BMW Z4 Idle Air Control Valve Replacement

An idle air control (IAC) valve is responsible for controlling the engine idling speed and the cost of replacing one varies depending on the year, make, and model of your car.

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Average Shop Price $428
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BMW Z4 Idle Air Control Valve Replacement

RepairSmith offers upfront and competitive pricing. The average cost for BMW Z4 Idle Air Control Valve Replacement is $496. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Car
Location
Quoted on
Price
2016 BMW Z4
2.0L L4 Turbo sDrive28i • 80,000 miles
Castro Valley CA 94552
Nov 12, 2020
$428 - $524
2005 BMW Z4
3.0L L6 3.0i • 26,000 miles
Canoga Park CA 91309
Nov 11, 2020
$457 - $559
2005 BMW Z4
3.0L L6 3.0i • 218,000 miles
Joshua Tree CA 92252
Oct 30, 2020
$488 - $596
2007 BMW Z4
3.0L L6 Coupe 3.0si • 110,000 miles
Half Moon Bay CA 94019
Oct 26, 2020
$465 - $569
2015 BMW Z4
3.0L L6 Turbo sDrive35is • 92,000 miles
Beverly Hills CA 90212
Oct 19, 2020
$469 - $573
2010 BMW Z4
3.0L L6 Turbo sDrive35i • 76,000 miles
Compton CA 90222
Oct 7, 2020
$416 - $508
2007 BMW Z4
3.2L L6 M Roadster • 69,000 miles
Selma CA 93662
Oct 3, 2020
$406 - $496
2004 BMW Z4
2.5L L6 2.5i • 202,000 miles
Tarzana CA 91356
Sep 22, 2020
$479 - $585
2013 BMW Z4
3.0L L6 Turbo sDrive35is • 106,000 miles
Loma Mar CA 94021
Sep 15, 2020
$447 - $547
2006 BMW Z4
3.0L L6 Roadster 3.0i • 70,000 miles
Huntington Beach CA 92646
Sep 15, 2020
$401 - $490
Last Updated:
Jan 21, 2021 4:52 PM
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What is an Idle Air Control Valve?

A four-word car part might sound confusing, but hang in there. You can keep up, I promise. An idle air control (IAC) valve is responsible for controlling the engine idling speed. See? Told you it was simple. The engine control module (don’t worry, this is just fancy speak for computer) supplies voltage to the IAC valve, which causes a pintle or rotary valve (depending on the car) to move in and out, adjusting airflow. More air means a higher idle. Now, your car might not have an IAC valve, as most modern cars have moved on to electronic throttle bodies. So if your car doesn’t have an IAC valve, you can skip this info. I promise you, it won’t need an IAC valve replacement if it doesn’t have an IAC valve.

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Symptoms of a failing Idle Air Control Valve

Bad idles

Okay, ready for some news that will knock your socks off? If the IAC valve, which is responsible for controlling the engine’s idle, isn’t working...the idling might not work right. If it feels like your car is idling too high or too low, there’s a good chance your IAC valve is the guilty party.

Poor engine performance

I get it. You might not notice when the idle speed is off. That’s understandable. But you better notice when the engine isn’t performing well. Surging and jerky acceleration is a sign of an IAC valve that’s not up to the task. So is stalling, and, in more extreme cases, a car that won’t even turn on.

Check engine light

Oh, you didn’t want to see this listed as a symptom, did you? I get it. You don’t pay attention to the check engine light. You think it’s meaningless, because it’s small and harmless looking. Spoiler alert: it’s not meaningless. Something’s wrong with your car, and it might be the IAC valve.

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How urgent is replacing an Idle Air Control Valve?

It’s not great to ignore an IAC valve that is malfunctioning. Your car won’t perform well, and you might get stuck with a car that won’t turn on, or will stall every time you’re at a red light. Not ideal. But not really a safety hazard either, and driving around with a busted IAC valve typically won’t put your engine at risk of further damage.

So get the IAC valve replaced, but no need to leave your friend’s wedding to do so. Unless you need a good excuse to get out of there.

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