SYKRSS 3444 Iridium Spark Plugs 4 Pack Compatible with

SYKRSS 3444 iridium spark plugs are a four-pack direct replacement for OEM part 90919-01253 (SC20HR11), designed to restore reliable ignition for compatible Toyota, Scion, Nissan and Lexus 1.3L–2.5L L4 engines.

If your engine shows signs of weak ignition, misfires, rough idle, or reduced fuel economy, replacing worn plugs with these SYKRSS iridium units restores spark consistency and firmer starts without complex modification. Manufactured to OE form, fit and function standards, these plugs use an iridium tip with a copper core and ceramic insulator for high-temperature durability and long service life. The package contains four plugs engineered to work with a range of vehicles including Toyota Corolla/Matrix, Prius, Prius V, Scion xD/iQ, Nissan Sentra/Frontier and Lexus CT200h — just confirm the OE number before purchase.

How do these SYKRSS iridium plugs improve engine starting and response?

Iridium’s hardness and fine electrode profile create a stable, concentrated spark that lights the air/fuel mix more efficiently than older nickel-style plugs. That yields faster cold starts, crisper throttle response and fewer misfires under load without changing ignition timing or engine tuning.

• Fine iridium center electrode for concentrated spark energy
• Copper core for optimal thermal conductivity and heat dissipation
• Ceramic insulator resists thermal shock for consistent performance
• Direct-fit design matches OE dimensions for easy swap-in

Will these plugs fit my vehicle and replace part 90919-01253 (SC20HR11)?

These SYKRSS 3444 plugs are manufactured to replace OE reference numbers 90919-01253 and SC20HR11. They fit a variety of L4 engines in model years listed for Toyota, Scion, Nissan and Lexus; always verify compatibility with your vehicle’s engine code and the OE part number before ordering.

• Compatible with Toyota Corolla/Matrix 2009–2013 (1.8L, 2.4L L4)
• Compatible with Toyota Prius/Prius V 2010–2013 (1.8L L4)
• Compatible with Scion xD 2008 (1.8L) and Scion iQ 2012–2013 (1.3L)
• Compatible with Nissan Sentra 2007–2008 and Frontier 2007 (2.0L–2.5L L4), plus Lexus CT200h 2011–2012

How durable are SYKRSS iridium plugs and what maintenance interval should I expect?

Iridium electrodes are much more wear-resistant than conventional plugs, so these units last longer and maintain a consistent gap longer under normal driving. Real-world longevity varies by driving conditions, but you can expect an extended service life compared with standard copper plugs.

• Iridium tip resists erosion for prolonged spark performance
• Built to OE specifications for thermal and mechanical durability
• Suitable for everyday driving, highway mileage, and light towing
• Inspect plugs at manufacturer-recommended intervals or if symptoms return

What common ignition symptoms can these plugs help address?

Replacing aged or fouled plugs with SYKRSS iridium units addresses many typical ignition-related drivability issues without costly repairs. While plugs alone won’t fix problems from wiring or coil failures, fresh iridium plugs often eliminate misfires, rough idle and diminished fuel economy when worn electrodes are the root cause.

• Reduce misfires and rough idling caused by worn electrodes
• Improve starting reliability in cold conditions
• Help recover lost fuel efficiency tied to weak spark
• Assist in clearing ignition-related check-engine-light codes when plugs are the issue

Who this is for: The SYKRSS 3444 iridium 4-pack suits owners and DIY mechanics who need an affordable, OE-form replacement for part 90919-01253 (SC20HR11) across a range of Toyota, Scion, Nissan and Lexus L4 engines. Choose these plugs if you want longer-lasting electrodes, straightforward bolt-in installation, and improved ignition consistency for everyday driving. Always verify vehicle and OE part compatibility before purchase and consult a technician for diagnosis if ignition issues persist.