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GMC Ignition Coils & Spark Plugs Kits

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2010-2017 GMC Terrain Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC11162010-2017 GMC Terrain Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1116
A-Premium®Part # APIC1116
2010-2017 GMC Terrain Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1116
4.7907 Reviews
$114.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Terrain: 2010 2011 2012 2013 2014 2015 2016 2017
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity12
ColorRed
item #1013A0AP
Note
【Note-1】Spark Plug Pre-Set Gap: 1.0-1.1.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】For 2012 Buick LaCrosse not fit CXS submodel.
Show less
2003-2007 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
A-Premium®Part # APIC0525
2003-2007 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
4.7907 Reviews
$151.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 3500: 2003 2004 2005 2006 2007
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002E00U
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits round coil, not square coil.;
【Note-3】This item comes with 4 Blade. Please double check it before your purchase.
Show less
2003-2005 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
A-Premium®Part # APIC0573
2003-2005 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
4.7907 Reviews
$145.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 3500: 2003 2004 2005
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorBlack
item #1002E70D
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2010-2017 GMC Terrain Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1103
A-Premium®Part # APIC1103
2010-2017 GMC Terrain Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1103
4.7907 Reviews
$124.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Terrain: 2010 2011 2012 2013 2014 2015 2016 2017
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity12
ColorBlue
item #1013A4HK
Note
【Note-1】Spark Plug Pre-Set Gap: 1.0-1.1.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】For 2012 Buick LaCrosse not fit CXS submodel.
Show less
2015-2016 GMC Canyon Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1116
A-Premium®Part # APIC1116
2015-2016 GMC Canyon Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1116
4.7907 Reviews
$114.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Canyon: 2015 2016
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity12
ColorRed
item #1013A4EY
Note
【Note-1】Spark Plug Pre-Set Gap: 1.0-1.1.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】For 2012 Buick LaCrosse not fit CXS submodel.
Show less
2001-2003 2005-2006 GMC Sierra 1500 HD Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
A-Premium®Part # APIC0525
2001-2003 2005-2006 GMC Sierra 1500 HD Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
4.7907 Reviews
$151.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Sierra 1500 HD: 2001 2002 2003 2005 2006
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002E3C0
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits round coil, not square coil.;
【Note-3】This item comes with 4 Blade. Please double check it before your purchase.
Show less
2001-2003 2005-2006 GMC Sierra 1500 HD Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
A-Premium®Part # APIC0573
2001-2003 2005-2006 GMC Sierra 1500 HD Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
4.7907 Reviews
$145.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Sierra 1500 HD: 2001 2002 2003 2005 2006
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorBlack
item #1002E9EZ
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2015-2016 GMC Canyon Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1103
A-Premium®Part # APIC1103
2015-2016 GMC Canyon Ignition Coil and Spark Plug Kit Set of 12 Iridium & Platinum Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC1103
4.7907 Reviews
$124.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Canyon: 2015 2016
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity12
ColorBlue
item #1013A33U
Note
【Note-1】Spark Plug Pre-Set Gap: 1.0-1.1.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】For 2012 Buick LaCrosse not fit CXS submodel.
Show less
2003-2005 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0575
A-Premium®Part # APIC0575
2003-2005 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0575
4.7907 Reviews
$142.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 3500: 2003 2004 2005
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002EA8W
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2004 GMC Envoy XUV Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
A-Premium®Part # APIC0525
2004 GMC Envoy XUV Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
4.7907 Reviews
$151.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2004 GMC Envoy XUV
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002E2DA
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits round coil, not square coil.;
【Note-3】This item comes with 4 Blade. Please double check it before your purchase.
Show less
2003-2005 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
A-Premium®Part # APIC0573
2003-2005 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
4.7907 Reviews
$145.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 2500: 2003 2004 2005
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorBlack
item #1002E6Y3
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2021-2023 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 16 Iridium Series | 4-Pin Terminal | 2-Year Warranty | A-Premium APIC0847
A-Premium®Part # APIC0847
2021-2023 GMC Savana 3500 Ignition Coil and Spark Plug Kit Set of 16 Iridium Series | 4-Pin Terminal | 2-Year Warranty | A-Premium APIC0847
4.7907 Reviews
$137.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 3500: 2021 2022 2023
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity16
ColorBlack
item #10155D4Z
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】This item is Round Coil, Not Square Coil.
Show less
2001-2003 2005-2006 GMC Sierra 1500 HD Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0575
A-Premium®Part # APIC0575
2001-2003 2005-2006 GMC Sierra 1500 HD Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0575
4.7907 Reviews
$142.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Sierra 1500 HD: 2001 2002 2003 2005 2006
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002EDTX
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2003-2007 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
A-Premium®Part # APIC0525
2003-2007 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
4.7907 Reviews
$151.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 2500: 2003 2004 2005 2006 2007
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002DZ69
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits round coil, not square coil.;
【Note-3】This item comes with 4 Blade. Please double check it before your purchase.
Show less
2004 GMC Envoy XUV Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
A-Premium®Part # APIC0573
2004 GMC Envoy XUV Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
4.7907 Reviews
$145.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2004 GMC Envoy XUV
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorBlack
item #1002E4WZ
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2021-2023 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 16 Iridium Series | 4-Pin Terminal | 2-Year Warranty | A-Premium APIC0847
A-Premium®Part # APIC0847
2021-2023 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 16 Iridium Series | 4-Pin Terminal | 2-Year Warranty | A-Premium APIC0847
4.7907 Reviews
$137.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 2500: 2021 2022 2023
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity16
ColorBlack
item #10155K21
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】This item is Round Coil, Not Square Coil.
Show less
2003-2005 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0575
A-Premium®Part # APIC0575
2003-2005 GMC Savana 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0575
4.7907 Reviews
$142.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Savana 2500: 2003 2004 2005
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002ECSR
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2000-2006 GMC Yukon XL 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
A-Premium®Part # APIC0525
2000-2006 GMC Yukon XL 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0525
4.7907 Reviews
$151.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Yukon XL 2500: 2000 2001 2002 2003 2004 2005 2006
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorRed
item #1002E02C
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits round coil, not square coil.;
【Note-3】This item comes with 4 Blade. Please double check it before your purchase.
Show less
2000-2006 GMC Yukon XL 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
A-Premium®Part # APIC0573
2000-2006 GMC Yukon XL 2500 Ignition Coil and Spark Plug Kit Set of 8 Iridium Series | 4-Blade Terminal | 2-Year Warranty | A-Premium APIC0573
4.7907 Reviews
$145.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Yukon XL 2500: 2000 2001 2002 2003 2004 2005 2006
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity8
Installation PositionFront
ColorBlack
item #1002E6WX
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs, and it only fits square coil, not round coil.;
【Note-3】For 2000-2001 Chevrolet Silverado 1500 fits the model with Mexico Emissions System.;
【Note-4】For 2003-2005 GMC Savana 3500 V8 6.0L fits GAS Only, Not CNG.;
【Note-5】For 2003 GMC Sierra 3500 V8 6.0L fits GAS Only, Not CNG.
Show less
2020-2023 GMC Sierra 3500 HD Ignition Coil and Spark Plug Kit Set of 16 Iridium Series | 4-Pin Terminal | 2-Year Warranty | A-Premium APIC0847
A-Premium®Part # APIC0847
2020-2023 GMC Sierra 3500 HD Ignition Coil and Spark Plug Kit Set of 16 Iridium Series | 4-Pin Terminal | 2-Year Warranty | A-Premium APIC0847
4.7907 Reviews
$137.99
Edit ZIP code
2-year warranty
90 days free return
Fits GMC Sierra 3500 HD: 2020 2021 2022 2023
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: GMC
Item LocatedUnited States
Quantity16
ColorBlack
item #10155HP3
Note
【Note-1】Spark Plug Pre-Set Gap: 1.2-1.3.;
【Note-2】This item comes with high-performance iridium spark plugs, much better than nickel and platinum spark plugs.;
【Note-3】This item is Round Coil, Not Square Coil.
Show less

Advantages of using an ignition coils and spark plugs kit

An ignition coils and spark plugs kit is a package that typically includes both ignition coils and spark plugs. An ignition coil and spark plug kit is often mentioned and sold together because these components work closely together in the ignition system. Advantages of using an ignition coils and spark plugs kit include:

  1. Improved Performance: Enhances engine performance, throttle response, and power output.
  2. Fuel Efficiency: Increases fuel efficiency and potentially improves gas mileage.
  3. Emission Reduction: This leads to cleaner combustion, reducing emissions.
  4. Smooth Idling: Promotes smoother and stable idling.
  5. Reliability: Enhances overall ignition system reliability.
  6. Simplified Maintenance: Convenient package with all necessary components.
  7. Optimal Timing: Maintains proper ignition timing.
  8. Consistency: Ensures consistent ignition across all cylinders.
  9. Extended Component Life: This can potentially prolong the life of coils and spark plugs.
  10. Cost-Effective: Often more cost-effective than buying components individually.

Should I replace ignition coils with spark plugs?

Replacing ignition coils along with spark plugs is not always necessary, but it can be a wise decision in certain situations:

  • Mileage and age: Consider replacement if your vehicle has high mileage or the ignition coils are old to maintain optimal performance.
  • Maintenance schedule: Refer to your vehicle's maintenance schedule for recommended replacement intervals.
  • Symptoms: If you experience issues like misfires, rough idling, reduced power, or poor fuel efficiency, consider inspecting and potentially replacing both components.
  • Efficiency and reliability: Simultaneous replacement can ensure consistent ignition timing, enhance reliability, and improve efficiency.
  • Cost consideration: Evaluate the condition of the components; if ignition coils are relatively new, you may replace only spark plugs.
  • Diagnostic testing: Consider diagnostic testing to assess the condition of ignition coils for an informed decision.

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