Auxiliary Air Regulator for 1999-2001 Nissan Maxima & More - Standard Ignition AC278

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$146.99
MPN: AC278
Item Package Quantity: 1
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Standard Ignition Idle Air Control Valve P/N:AC278
Standard Ignition Idle Air Control Valve P/N:AC278
$146.99

Help keep your engine's idle speed steady with the Standard Ignition Idle Air Control Valve, part number AC278. It is a direct-fit replacement for the listed applications: the 1999-2001 Nissan Maxima with the V6-3.0L, the 2000-2001 Infiniti I30 with the V6-3.0L, and the 2002 Infiniti I35 with the V6-3.5L.

An idle air control valve regulates how much air bypasses the closed throttle plate while the engine idles. The engine control module commands the valve to adjust that bypass air, which is how it manages idle speed as operating conditions change.

  • Part type: fuel injection idle air control valve.
  • Engines: V6-3.0L and V6-3.5L, as listed for each vehicle.
  • Quantity per application: the listed applications use one valve per vehicle.

Signs this part may need replacing: an idle that is erratic, surging, too high or too low; stalling at idle or when coming to a stop; or an illuminated check engine light. Other faults, such as vacuum leaks or sensor problems, can cause the same symptoms, so diagnose the cause before replacing. If a failed idle air control valve is the cause, AC278 replaces it.

Frequently Asked Questions

What does an idle air control valve do?

It regulates how much air bypasses the closed throttle plate at idle, so the engine control module can adjust idle speed as operating conditions change.

Which vehicles does Standard Ignition AC278 fit?

It is listed for the 1999-2001 Nissan Maxima (V6-3.0L), the 2000-2001 Infiniti I30 (V6-3.0L) and the 2002 Infiniti I35 (V6-3.5L).

How many idle air control valves do I need?

The listed applications use one idle air control valve per vehicle.

What are signs of a failing idle air control valve?

Signs include an erratic, surging, high or low idle, stalling at idle, and a check engine light. Other faults can cause these too, so diagnose the cause before replacing.

Will AC278 fix my idle problem?

If a failed idle air control valve is causing the problem, AC278 replaces it. Vacuum leaks, sensor faults and other issues can produce similar symptoms, so confirm the cause first.