Factory Ford Spark Plugs

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You aren't able to start your Ford without ignition. That only comes about thanks to the original spark plugs installed at the factory. Those generate that initial flash that ignites the air/fuel mix in your engine's combustion chamber.

How Do Spark Plugs Work?

The spark plugs have a precisely calibrated gap between their two leads. They fire an arc of electricity across that gap, which fuels the flash that initiates ignition. If your Ford has a diesel engine, it doesn't have spark plugs. Instead, it's equipped with glowplugs. They have a heating element in their tip that lights the fuel mist that's sprayed into the engine cylinder. Whether your vehicle is equipped with spark plugs or glowplugs, your Ford came with the right type for your engine. Eventually even these high-quality plugs can go bad, though. Maybe they've become corroded, or the gap has widened too far to produce an effective spark. Before you blame your alternator for starting troubles, check your plugs.

Signs of Failing Spark Plugs

Here are some common indications that your plugs are going bad:

  • Engine misfires
  • Uneven idling
  • Problems starting the vehicle
  • Your "Check Engine" dash light comes on

Your owner's manual will inform you as to how often you need to change your spark plugs. Make sure to replace them before they go past their rated mileage, or else you're risking engine problems. When you do replace your spark plugs, make sure to change all of them at the same time and use the right plugs for your model. Those would be Ford plugs, since they're the only ones designed to deliver quality you can trust. Our online auto parts department has plenty in stock and ready to ship. Order now and save!

Spark Plug
Part Number: SP521
MSRP $7.95
$5.03
MSRP $7.95
$5.03
Spark Plug
Part Number: SP532
MSRP $10.75
$6.80
MSRP $10.75
$6.80
Spark Plug
Part Number: SP550
MSRP $7.78
$4.92
MSRP $7.78
$4.92
Spark Plug
Part Number: SP578
MSRP $12.00
$7.59
MSRP $12.00
$7.59
Spark Plug
Part Number: SP417
MSRP $5.64
$3.57
MSRP $5.64
$3.57
Spark Plug
Part Number: CYFS12FP
Description: 6.2L. More Info
Fits:
  • Ford:
    • E-350 Super Duty,
    • F-150,
    • F-250 Super Duty,
    • F-350 Super Duty
MSRP $7.33
$4.63
MSRP $7.33
$4.63
Spark Plug
Part Number: SP590
MSRP $12.00
$7.59
MSRP $12.00
$7.59
Spark Plug
Part Number: SP588
MSRP $12.00
$7.59
MSRP $12.00
$7.59
Spark Plug
Part Number: SP586
MSRP $12.00
$7.59
MSRP $12.00
$7.59
Spark Plug
Part Number: SP581
MSRP $12.00
$7.59
MSRP $12.00
$7.59
Spark Plug
Part Number: CYFS092YPT4
Replaces: KR3Z-12405-A, SP-579-
Description: 5.2L, with supercharger. More Info
Fits:
  • Ford:
    • Mustang
MSRP $12.00
$7.59
MSRP $12.00
$7.59
Spark Plug
Part Number: SP536
MSRP $10.95
$6.92
MSRP $10.95
$6.92
Spark Plug
Part Number: AYFS092FE1X
Replaces: AYFS-092-FE1, AYFS-92-FE1, SP-524-
Description: 2.0L dohc, with svt. More Info
MSRP $8.55
$5.41
MSRP $8.55
$5.41
Spark Plug
Part Number: SP523X
MSRP $8.02
$5.07
MSRP $8.02
$5.07
Spark Plug
Part Number: AGSF34NX
Replaces: AGSF-34N-, SP-506-
MSRP $3.82
$2.42
MSRP $3.82
$2.42
Spark Plug
Part Number: AGSF22CA
Replaces: AGSF-22C-, SP-505-
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: SP502
MSRP $4.20
$2.66
MSRP $4.20
$2.66
Spark Plug
Part Number: SP501
MSRP $4.20
$2.66
MSRP $4.20
$2.66
Spark Plug
Part Number: SP498X
MSRP $5.64
$3.57
MSRP $5.64
$3.57
Spark Plug
Part Number: SP495
MSRP $6.00
$3.80
MSRP $6.00
$3.80
Spark Plug
Part Number: SP488AX
MSRP $4.22
$2.67
MSRP $4.22
$2.67
Spark Plug
Part Number: TT10AX
Replaces: SP-488-, SP-488-A, TT-10-, TT-10-A
MSRP $4.22
$2.67
MSRP $4.22
$2.67
Spark Plug
Part Number: SP482X
MSRP $5.64
$3.57
MSRP $5.64
$3.57
Spark Plug
Part Number: AGSF44FMX
Replaces: AGSF-44F-M, SP-482-
Description: 4.0L, ohv. Exc.Calif. Vendor #awsf 44-p. Vendor:motorcraft. Vendor #awsf 44-pp. Vendor #awsf 44-ee. More Info
MSRP $5.64
$3.57
MSRP $5.64
$3.57
Spark Plug
Part Number: SP478X
MSRP $8.55
$5.41
MSRP $8.55
$5.41
Spark Plug
Part Number: AZFS32FEX
Replaces: AZFS-32F-E, SP-478-
Description: 2.0L dohc, without svt. More Info
MSRP $8.55
$5.41
MSRP $8.55
$5.41
Spark Plug
Part Number: SP473A
MSRP $1.29
$0.82
MSRP $1.29
$0.82
Spark Plug
Part Number: SP470
MSRP $6.00
$3.80
MSRP $6.00
$3.80
Spark Plug
Part Number: SP469
MSRP $7.87
$4.98
MSRP $7.87
$4.98
Spark Plug
Part Number: SP463A
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: SP461
MSRP $1.35
$0.85
MSRP $1.35
$0.85
Spark Plug
Part Number: SP459X
MSRP $8.18
$5.18
MSRP $8.18
$5.18
Spark Plug
Part Number: SP452
MSRP $4.29
$2.71
MSRP $4.29
$2.71
Spark Plug
Part Number: ASF42CA
Replaces: ASF-42-C, SP-450-
Description: Optional. Vendor #ASF 42-C. Vendor:motorcraft. More Info
Fits:
  • Ford:
    • E-350 Econoline,
    • E-350 Econoline Club Wagon,
    • F-250,
    • F-350,
    • Mustang,
    • Thunderbird
  • Lincoln:
    • Mark VII
  • Mercury:
    • Capri,
    • Cougar
  • 4 more
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: SP447A
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: SP446A
MSRP $2.60
$1.64
MSRP $2.60
$1.64
Spark Plug
Part Number: AGSF42C6A
Replaces: AGSF-42C-6, SP-446-
MSRP $2.60
$1.64
MSRP $2.60
$1.64
Spark Plug
Part Number: SP445AX
MSRP $3.55
$2.24
MSRP $3.55
$2.24
Spark Plug
Part Number: SP442A
MSRP $1.29
$0.82
MSRP $1.29
$0.82
Spark Plug
Part Number: AGS32CA
Replaces: AGS-32C-, SP-436-
MSRP $2.56
$1.62
MSRP $2.56
$1.62
Spark Plug
Part Number: SP431A
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: BSF82CA
Replaces: BSF-82C-, SP-431-
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: SP428A
MSRP $2.60
$1.64
MSRP $2.60
$1.64
Spark Plug
Part Number: AGSP54CA
Replaces: AGSP-54C-, SP-428-
MSRP $2.60
$1.64
MSRP $2.60
$1.64
Spark Plug
Part Number: SP425A
MSRP $2.65
$1.68
MSRP $2.65
$1.68
Spark Plug
Part Number: AGSP52CA
Replaces: AGSP-52C-, SP-424-
MSRP $1.29
$0.82
MSRP $1.29
$0.82
Spark Plug
Part Number: AGS52CA
Replaces: AGS-52C-, SP-423-
MSRP $1.29
$0.82
MSRP $1.29
$0.82
Spark Plug
Part Number: BSF42CA
Replaces: BSF-42C-, SP-420-
MSRP $3.00
$1.90
MSRP $3.00
$1.90
Spark Plug
Part Number: SP419A
MSRP $2.65
$1.68
MSRP $2.65
$1.68
Spark Plug
Part Number: AWSF42CA
Replaces: AWSF-42C-, SP-419-
Description: Standard. Vendor #awsf 42-c. Vendor:motorcraft. More Info
Fits:
  • Ford:
    • Aerostar,
    • Bronco II,
    • Explorer,
    • Ranger,
    • Tempo
  • Mercury:
    • Topaz
  • 1 more
MSRP $2.65
$1.68
MSRP $2.65
$1.68

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