Spark plugs do far more than start your Subaru Crosstrek. They shape throttle response, fuel economy, cold starts, and long-term engine smoothness. A worn or low-quality plug can cause rough idling, weak acceleration, and annoying misfires that make daily driving less enjoyable.
The right upgrade helps your boxer engine run cleaner, fire faster, and deliver steady power in city traffic or weekend road trips. This guide breaks down the 5 best spark plugs for Subaru Crosstrek owners who want reliability, strong ignition performance, and better value for their maintenance budget.
You will see top options for OEM-like dependability, long service life, and improved combustion efficiency. Each pick suits the Crosstrek’s engine needs and supports smooth performance across different driving conditions.
By the end, you can pick a spark plug set that matches your model year, driving style, and maintenance goals without wasting money on poor-quality parts for years to come.
5 Best Spark Plugs for Subaru Crosstrek
Our Top 5 Best Spark Plugs For Subaru Crosstrek Reviews – Expert Tested & Recommended
1. NGK Laser Iridium Spark Plugs – 4-Pack for Subaru Crosstrek 2.0L H4 (2018-2020)
The NGK Laser Iridium Spark Plugs are engineered for precision and long-term reliability, making them our top pick for the Subaru Crosstrek. Designed specifically for the 2.0L H4 engine, these plugs deliver consistent ignition and improved fuel economy. Whether you’re replacing worn plugs or upgrading for better performance, this 4-pack ensures a smooth, responsive ride.
Key Features That Stand Out
- ✓ Laser-welded iridium center electrode for maximum durability
- ✓ Taper-cut ground electrode improves flame propagation
- ✓ OE-spec gap for easy installation no adjustment needed
- ✓ Triple gasket seal prevents combustion leaks
- ✓ Corrugated ribs reduce flashover risk
Why We Recommend It
NGK is a trusted name in ignition systems, and these laser iridium plugs live up to the reputation. They offer superior wear resistance and stable spark output, which translates to fewer misfires and better throttle response. Perfect for Crosstrek owners who want OEM-level quality with enhanced longevity.
Best For
Daily drivers and commuters looking for a reliable, high-performance spark plug that lasts up to 100,000 miles.
Pros and Cons
Pros:
- Exceptional longevity and durability
- Improved fuel efficiency and smoother idle
- Exact fit no modifications required
- Backed by NGK’s reputation for quality
Cons:
- Slightly higher price than standard copper plugs
- Limited to 2018–2020 Crosstrek models
Customer Reviews
Customer Review: “Received on time and without issue…these are the correct fit and size for a 2018 Subaru Crosstrek. They were gapped correctly and with the proper tools, they required little to no effort to install. The car fired right up after my work was completed and I’ve had better acceleration and my gas mileage improved slightly.”
Customer Review: “OEM can’t complain. They are in and fire right up no issues.”
2. A-Premium Double Iridium Spark Plugs – For Subaru Impreza & Crosstrek 2.0L (2017-2020)
The A-Premium Double Iridium Spark Plugs offer premium performance at a competitive price. With dual iridium construction on both the center and ground electrodes, these plugs deliver excellent ignitability and reduced wear. Ideal for Crosstrek owners seeking a high-quality aftermarket upgrade without the OEM price tag.
Key Features That Stand Out
- ✓ Double iridium tip for enhanced spark efficiency
- ✓ 0.032″ pre-gapped for direct installation
- ✓ 5,000-ohm resistance for optimal signal transfer
- ✓ Compatible with 92217 and DILKAR7B8 part numbers
- ✓ Superior anti-fouling design
Why We Recommend It
These plugs are built to match or exceed OEM performance while offering better value. The double iridium design ensures a stronger, more consistent spark, which improves combustion efficiency and engine responsiveness—especially noticeable in stop-and-go traffic.
Best For
Budget-conscious drivers who still want premium materials and performance. Great for 2017–2020 Crosstrek models needing a reliable replacement.
Pros and Cons
Pros:
- Excellent value for money
- Improved throttle response and smoother acceleration
- Long service life up to 80,000 miles
- Easy drop-in installation
Cons:
- Not as widely recognized as NGK or OEM brands
- May require periodic gap checks in high-mileage engines
Customer Reviews
Customer Review: “Nice plug and a good fit for the 2018 Crosstrek. Car had 94 k on original plugs and was running fine, but after I put these in, it now runs better and stronger! Read more”
3. NGK Iridium IX Spark Plug 4-Pack LKAR7BIX-11S – High Performance Ignition
The NGK Iridium IX plugs are designed for performance enthusiasts who want sharper throttle response and improved combustion. With a fine 0.6mm iridium tip and tapered ground electrode, these plugs ignite fuel more efficiently, reducing emissions and boosting power. A solid choice for Crosstrek owners looking for a responsive upgrade.
Key Features That Stand Out
- ✓ 0.6mm laser-welded iridium center electrode
- ✓ Tapered ground electrode for better flame kernel development
- ✓ Longer insulator nose prevents fouling
- ✓ Corrugated ribs eliminate flashover
- ✓ Triple gasket seal for leak-proof operation
Why We Recommend It
While not OEM-spec, the Iridium IX offers a noticeable improvement in engine smoothness and responsiveness. It’s ideal if you’ve tuned your Crosstrek or just want a more engaging driving experience without sacrificing reliability.
Best For
Drivers who prioritize performance and responsiveness, especially in hilly or mountainous terrain where throttle input matters.
Pros and Cons
Pros:
- Enhanced throttle response and smoother idle
- Reduced misfires and improved combustion
- High-quality NGK construction
- Great for performance-oriented driving
Cons:
- Not pre-gapped may require adjustment
- Overkill for basic daily driving needs
Customer Reviews
Customer Review: “Received on time. Got my shop to install them. Once I got in the car, noticed it was smoother and more responsive. I won’t say night and day difference like ‘omg it feels like a new car’ more so the car felt newer and more alive. No more sluggish response, misfires, or rough idle. Does the job.”
4. Genuine Subaru OEM Spark Plugs – For Forester, Impreza, Legacy, Crosstrek (2011-2017)
When you want factory-perfect fit and performance, the Genuine Subaru OEM Spark Plugs are the way to go. Designed specifically for Subaru’s 2.0L and 2.5L engines, these plugs ensure optimal combustion, fuel efficiency, and emissions control. A must-have for owners who prefer original equipment quality.
Key Features That Stand Out
- ✓ Direct OEM replacement—no modifications needed
- ✓ Precision-engineered for Subaru’s ignition system
- ✓ Includes 4 spark plugs (part #22401AA781)
- ✓ Designed for 2011–2017 Crosstrek models
- ✓ Meets all factory specifications
Why We Recommend It
If you’re doing maintenance at home or through a dealer, OEM plugs guarantee compatibility and performance. They’re especially valuable for warranty purposes or if you’re selling your Crosstrek and want to maintain service records with genuine parts.
Best For
Owners of 2011–2017 Crosstrek models who want factory-recommended parts and peace of mind.
Pros and Cons
Pros:
- Perfect fit and function
- Trusted by Subaru technicians
- Maintains vehicle warranty compliance
- Consistent performance and reliability
Cons:
- Higher cost than aftermarket alternatives
- Limited to older Crosstrek models
- No performance upgrade over stock
Customer Reviews
Customer Review: “Genuine Subaru parts always fit perfectly. No issues installing, and the engine runs just as smooth as it did when new.”
Customer Review: “Expensive but worth it for the peace of mind. My mechanic recommended OEM for my 2015 Crosstrek.”
5. Platinum Iridium Spark Plugs – 4-Pack for Subaru Forester, Crosstrek, Legacy (2.0L–2.5L)
This 4-pack of Platinum Iridium Spark Plugs offers a balanced blend of premium materials and affordability. Featuring a platinum center electrode and iridium tip, they deliver reliable ignition and reduced electrode wear. Compatible with a wide range of Subaru models, including the Crosstrek, Forester, and Legacy.
Key Features That Stand Out
- ✓ Platinum center electrode with iridium tip
- ✓ High-strength ceramic insulator
- ✓ Superior anti-fouling and anti-corrosion properties
- ✓ Wide compatibility across Subaru 2.0L–2.5L engines
- ✓ OE-style design for direct replacement
Why We Recommend It
These plugs are a great middle-ground option offering better performance than standard copper plugs without the premium price of full iridium models. They’re ideal for routine maintenance and provide noticeable improvements in idle stability and fuel economy.
Best For
Subaru owners looking for a durable, cost-effective upgrade over stock copper plugs, especially in 2011–2018 models.
Pros and Cons
Pros:
- Longer lifespan than copper plugs
- Improved ignition sensitivity
- Affordable price point
- Wide vehicle compatibility
Cons:
- Not as durable as full iridium plugs
- Limited performance gains
Customer Reviews
Customer Review: “Good value for the price. Fit my 2016 Crosstrek perfectly and the engine runs smoother now.”
Customer Review: “Not the fanciest, but they work well. No issues after 10,000 miles.”
Complete Buying Guide for Best Spark Plugs for Subaru Crosstrek
Essential Factors We Consider
When choosing the best spark plugs for your Subaru Crosstrek, we evaluate several key factors: compatibility with your model year and engine size (2.0L or 2.5L), electrode material (copper, platinum, or iridium), pre-gapped design for easy installation, and longevity.
We also consider real-world performance feedback, including improvements in fuel economy, throttle response, and engine smoothness. Always check your owner’s manual for the recommended plug type and replacement interval typically every 60,000 to 100,000 miles depending on the material.
Budget Planning
Spark plug prices vary widely: copper plugs start around $5 each, while iridium and platinum models range from $10 to $20 per plug. While OEM and premium aftermarket plugs cost more upfront, they often last longer and improve efficiency, saving money on fuel and future replacements. For most Crosstrek owners, investing in iridium or double iridium plugs offers the best balance of cost and performance.
Final Thoughts
Upgrading your spark plugs is one of the simplest ways to keep your Subaru Crosstrek running at its best. Whether you choose our top pick the NGK Laser Iridium or a budget-friendly option like the A-Premium Double Iridium, the right plug makes a real difference. Don’t wait for misfires or poor mileage; replace your plugs proactively and enjoy a smoother, more responsive ride.
Frequently Asked Questions
Q: How often should I replace spark plugs in my Subaru Crosstrek?
A: Most modern iridium or platinum spark plugs last between 60,000 and 100,000 miles. Check your owner’s manual for the exact interval typically every 60,000 miles for 2.0L engines. If you notice rough idling, poor acceleration, or reduced fuel economy, it may be time for a replacement sooner.
Q: Can I use performance spark plugs like NGK Iridium IX in my daily-driven Crosstrek?
A: Yes! While designed for performance, plugs like the NGK Iridium IX work perfectly in daily drivers. They improve throttle response and combustion efficiency, making your Crosstrek feel more responsive without any downsides.
Q: Do I need to gap these spark plugs before installation?
A: Most premium plugs, including NGK Laser Iridium and A-Premium Double Iridium, come pre-gapped to Subaru specifications. However, always double-check with a gap tool—especially with performance-oriented plugs like the Iridium IX.
Q: Are aftermarket spark plugs safe for my Subaru?
A: Yes, as long as they’re compatible with your engine and meet OEM specifications. Reputable brands like NGK, Denso, and A-Premium are widely used and trusted by mechanics and enthusiasts alike.
Q: Will new spark plugs improve my gas mileage?
A: In many cases, yes. Fresh spark plugs ensure complete combustion, which can improve fuel efficiency by 1–3%. Combined with smoother engine operation, the savings add up over time.