24/7 Customer service
To make aftermarket auto parts an afterthought.
Add your vehicle
Address
Login
Cart
Item
CA$0.00
Add your vehicle to ensure fitment/Choose a yearRequired Fields
Select a different vehicle
Make/Model
VIN
Save

2018 INFINITI Q50 Spark Plug

4 items

Spark plug replacement helps cure misfires, rough idle, weak starts, and wasted fuel. Pick the right socket size and restore crisp, reliable ignition.

  • All filters
  • Sort By
  • Price
  • Brand
  • Material
  • Warranty
6 Pack Double Iridium Spark Plug | A-Premium APSP1976 Pack Double Iridium Spark Plug | A-Premium APSP197
A-Premium®Part # APSP197
6 Pack Double Iridium Spark Plug | A-Premium APSP197
4.921 Reviews
CA$49.99
CA$52.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2017 - 2020 Infiniti Q60, 2016 - 2020 Infiniti Q50
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2018 INFINITI Q50
Item LocatedCanada
Quantity6
MaterialDouble Iridium
ConditionNew
item #10051Q91
Show less
6 Pack Iridium Spark Plug | A-Premium APSP160
A-Premium®Part # APSP160
6 Pack Iridium Spark Plug | A-Premium APSP160
4.921 Reviews
CA$58.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2016 - 2020 Nissan Maxima, 2014 - 2020 INFINITI QX60, 2014 - 2018 INFINITI Q50, 2014 - 2018 INFINITI Q70, 2013 - 2020 Nissan Pathfinder, 2013 - 2013 INFINITI JX35, 2012 - 2013 INFINITI M35h, 2011 - 2017 Nissan Quest, 2011 - 2012 INFINITI G25, 2009 - 2020 Nissan Murano, 2009 - 2014 Nissan Maxima, 2009 - 2012 INFINITI FX35, 2009 - 2010 INFINITI M35, 2008 - 2012 INFINITI EX35, 2008 - 2008 INFINITI G35, 2007 - 2018 Nissan Altima, 2007 - 2009 Nissan 350Z, 2007 - 2007 INFINITI G35
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2018 INFINITI Q50
Item LocatedCanada
Quantity6
MaterialIridium + Platinum
ConditionNew
item #100525NQ
Show less
6 Pack Double Iridium Spark Plug | A-Premium APSP122SOLD OUT
A-Premium®Part # APSP122
6 Pack Double Iridium Spark Plug | A-Premium APSP122
4.921 Reviews
CA$53.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2015 - 2019 INFINITI Q70L, 2015 - 2015 INFINITI Q40, 2014 - 2019 INFINITI Q70, 2014 - 2017 INFINITI QX50, 2014 - 2017 INFINITI QX70, 2014 - 2015 INFINITI Q50, 2014 - 2015 INFINITI Q60, 2013 - 2013 INFINITI EX37, 2013 - 2013 INFINITI FX37, 2011 - 2013 INFINITI M37, 2009 - 2020 Nissan 370Z, 2008 - 2013 INFINITI G37
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2018 INFINITI Q50
Item LocatedCanada
Quantity6
MaterialDouble Iridium
ConditionNew
item #10051HY1
Show less
4 Pack Iridium Spark Plug | A-Premium APSP130SOLD OUT
A-Premium®Part # APSP130
4 Pack Iridium Spark Plug | A-Premium APSP130
4.921 Reviews
CA$47.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2019 - 2021 Mercedes-Benz Sprinter 1500, 2019 - 2021 Mercedes-Benz Sprinter 2500, 2019 - 2020 Freightliner Sprinter 1500, 2019 - 2020 Freightliner Sprinter 2500, 2018 - 2020 Mercedes-Benz GLC350e, 2017 - 2020 Mercedes-Benz SLC300, 2017 - 2019 INFINITI QX30, 2017 - 2019 Mercedes-Benz E300, 2017 - 2018 INFINITI Q60, 2016 - 2020 Mercedes-Benz Metris, 2016 - 2019 INFINITI Q50, 2016 - 2019 Mercedes-Benz GLC300, 2016 - 2018 Mercedes-Benz C350e, 2016 - 2016 Mercedes-Benz SLK300, 2015 - 2020 Mercedes-Benz GLA250, 2015 - 2018 Mercedes-Benz C300, 2014 - 2019 Mercedes-Benz CLA250, 2013 - 2019 Mercedes-Benz B250
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2018 INFINITI Q50
Item LocatedCanada
Quantity4
MaterialIridium + Platinum
ConditionNew
item #1000KLXC
Show less

What does a spark plug do?

A spark plug is like the ignition spark that gets your engine firing on all cylinders—literally. It’s a small but vital part that plays a huge role in the engine’s performance. When you start your car, the spark plug generates a spark that ignites the fuel and air mixture inside the engine’s cylinders. This controlled explosion powers the engine’s pistons, which then turn the crankshaft and keep the vehicle moving. Without the spark plug, the engine would fail to combust the fuel, and your car simply wouldn’t start.

Not only does the spark plug create this spark, but it also helps keep the combustion process efficient. A properly working spark plug ensures smooth engine performance, better fuel efficiency, and lower emissions. Over time, spark plugs wear out and can affect everything from acceleration to engine misfires. So, while it’s a small part, its job is crucial for your vehicle to run properly and efficiently.

Symptoms of a bad spark plug

Bad spark plugs can cause several noticeable symptoms in your vehicle. You might experience engine misfires, where the engine runs unevenly, jerks, or stalls. Poor acceleration is another sign, with your car feeling sluggish or slow to respond when you press the gas pedal. A rough idle, where the engine shakes or vibrates at a stop, is also common. If you notice your car is using more gas than usual, it could be due to decreased fuel efficiency caused by faulty spark plugs. Hard starting, where the engine takes longer to crank, and the Check Engine light coming on are also indicators. Lastly, you may see increased exhaust emissions, with a strong gasoline smell or black smoke coming from the tailpipe. If you notice any of these, it’s a good idea to check and replace your spark plugs.

Get the best spark plugs here at A-Premium

Say goodbye to rough idling, engine misfires, or starting issues with the new spark plugs from A-Premium. Our spark plugs are compatible with virtually all makes and models across a wide range of heat ratings. Shop online now and enjoy free shipping and fast delivery.

At A-Premium, we make it simple to find the perfect parts for your vehicle. If you're asking, “Which spark plugs do I need?” just enter your car’s year, make, model, and engine details at the top of this page, and we'll help you choose the right spark plugs. For example, if you need spark plugs for your Honda Civic, just enter its information, and we’ll recommend the perfect fit. Shop now!

Related Blogs

Best Spark Plug Brands: Which One Fits Your Engine?

Choose the right spark plug by matching specs, not just brand. This guide compares eight widely considered choices using their product positioning, application strengths, and recurring owner concerns.

Oct 16, 2026

Why Won't My Spark Plug Socket Fit Over the Plug?

Spark plug socket won't fit? Don't force it. Diagnose if the issue is wrong hex size, thick walls, debris, oil, or a stuck coil boot. Learn safe removal steps to avoid damaging plugs or cylinder heads.

Sep 23, 2026

What Does It Sound Like When a Spark Plug Goes Bad?

Identify bad spark plugs by sound: listen for sputtering, chugging, or snapping. Distinguish these from other engine noises and use step-by-step diagnostics to confirm the issue before replacing parts.

Sep 21, 2026