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Standard IgnitionPart #: AC21
Standard Ignition AC21 Idle Air Control Valve
71 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford, Lincoln, and Mercury, Bronco II, Capri, Continental, Cougar, Grand Marquis, LTD Crown Victoria, Mark VII, Mustang, Thunderbird, and Town Car
Easy Returns — Return within 60 days for a full refund
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Not what you need? See all Idle Air Control Valve options
Standard Ignition AC21 Idle Air Control Valve
| Brand | Standard Ignition |
|---|---|
| Part Number | AC21 |
| Terminal Quantity | 2 |
| Terminal Type | Blade terminals |
This part fits 71 vehicles. Search below:
| Year | Make | Model | Transmission | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1993 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1993 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1992 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1992 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1992 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1992 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1991 | Ford | LTD Crown Victoria | Automatic | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. |
| 1991 | Ford | LTD Crown Victoria | Automatic | 5.8L | V8 | N/A | Fitment: Primary with California Emissions. |
| 1991 | Ford | LTD Crown Victoria | 5.0L | V8 | N/A | w/ Calif. Emissions; Auxiliary Air Valve | |
| 1991 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1991 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1991 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1991 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1991 | Mercury | Grand Marquis | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1991 | Mercury | Grand Marquis | 5.0L | V8 | N/A | w/ Calif. Emissions; Auxiliary Air Valve | |
| 1990 | Ford | Bronco II | 2.9L | V6 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1990 | Ford | LTD Crown Victoria | Automatic | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. |
| 1990 | Ford | LTD Crown Victoria | Automatic | 5.8L | V8 | N/A | Fitment: Primary with California Emissions. |
| 1990 | Ford | LTD Crown Victoria | 5.0L | V8 | N/A | w/ Calif. Emissions; Auxiliary Air Valve | |
| 1990 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1990 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1990 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1990 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1990 | Lincoln | Town Car | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1990 | Mercury | Grand Marquis | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1990 | Mercury | Grand Marquis | 5.0L | V8 | N/A | w/ Calif. Emissions; Auxiliary Air Valve | |
| 1989 | Ford | LTD Crown Victoria | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1989 | Ford | LTD Crown Victoria | 5.0L | V8 | N/A | w/ Calif. Emissions; Auxiliary Air Valve | |
| 1989 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1989 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1989 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1989 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1989 | Lincoln | Town Car | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1989 | Mercury | Grand Marquis | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1989 | Mercury | Grand Marquis | 5.0L | V8 | N/A | w/ Calif. Emissions; Auxiliary Air Valve | |
| 1988 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1988 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1988 | Ford | Thunderbird | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1988 | Ford | Thunderbird | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1988 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1988 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1988 | Lincoln | Town Car | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1988 | Lincoln | Town Car | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1988 | Mercury | Cougar | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1988 | Mercury | Cougar | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1987 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1987 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1987 | Ford | Thunderbird | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1987 | Ford | Thunderbird | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1987 | Lincoln | Continental | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1987 | Lincoln | Continental | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1987 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1987 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1987 | Lincoln | Town Car | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1987 | Lincoln | Town Car | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1987 | Mercury | Cougar | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1987 | Mercury | Cougar | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Ford | Mustang | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1986 | Ford | Mustang | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Ford | Thunderbird | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1986 | Ford | Thunderbird | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Lincoln | Continental | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1986 | Lincoln | Continental | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Lincoln | Mark VII | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1986 | Lincoln | Mark VII | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Lincoln | Town Car | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1986 | Lincoln | Town Car | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Mercury | Capri | 5.0L | V8 | N/A | Primary application for specific vehicle models ~ Idle Air Control Valve | |
| 1986 | Mercury | Capri | 5.0L | V8 | N/A | Compatible with various car models. | |
| 1986 | Mercury | Cougar | 5.0L | V8 | N/A | Fitment: Primary with California Emissions. | |
| 1986 | Mercury | Cougar | 5.0L | V8 | N/A | Compatible with various car models. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
150-212171192962-1943215-2000217622IAC00083-19434J100873-48268490ABV0035AC21TACVB10014CV10141CX1824E6ZE9F715A1AIAC66
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.