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If your Scion xB is showing rough starts or intermittent misfires, the ignition coil is a common component to check. Choosing the right Scion xB ignition coil matters because a proper coil restores consistent spark delivery, improves drivability, and helps maintain emissions performance. This guide highlights a short list of the top picks for the Scion xB, each shortlisted for suitability and reliability. We evaluated items based on fitment accuracy, electrical output consistency, and build quality, with attention to ease of installation and serviceability. Read on for the criteria we used and what to look for when selecting a replacement ignition coil.
Looking for other parts? See all Scion xB parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | LCWRGS Ignition Coil Pack, 4-Pack (fits 2.4L Scion xB) |  |
| Most Popular A crowd favorite that many people choose with confidence | KAX Ignition Coil and Double Iridium Spark Plug Set (4-Pack) |  |
| Best Quality Built to a higher standard if you want something more solid | Denso 673-1307 Direct Ignition Coil |  |
| Best Budget The cheapest option that still gets the job done reliably | lacarier Ignition Coil Pack (2.4L) compatible with Scion xB and select Toyota/Lexus models |  |
| Most Sold A high-volume bestseller chosen again and again | Motorevo Ignition Coil Pack and Iridium Spark Plugs Set of 4 |  |
| Best Value for Money The sweet spot between price and what you get | Denso Direct Ignition Coil 673-1308 |  |
| Best Overall The best all-around choice for most situations | BDFHYK Ignition Coil Pack UF333 with Iridium Spark Plugs (Set of 4) |  |
1. LCWRGS Ignition Coil Pack, 4-Pack (fits 2.4L Scion xB)
| Compatible with Vehicle Type | Car, SUV, Hybrid |
|---|---|
| Part Interchange Info | 90919-02244, UF333, 90919-02243, 5C1299, 90919-02266 |
| Connector Gender | Female |
| Automotive Fit Type | Vehicle Specific Fit |
These LCWRGS ignition coil packs are a direct replacement option for 2.4L Scion xB engines and are sold as a set of four for complete bank servicing. They are built with high-conductivity windings and epoxy encapsulation aimed at matching factory-style performance and improving spark energy, which in everyday use can reduce misfires and restore smooth throttle response after an original coil fails. Installation is straightforward because the packs follow the factory connector and mounting layout, so a DIYer with basic tools can swap the set in under an hour. The pack claims higher energy output than stock and includes a 24-month warranty for peace of mind. Be aware that while many buyers report solid results, there are mixed reports of early failures, so longevity may vary part-to-part; if symptoms persist after installation, further diagnosis of wiring or fuel/ignition components is recommended. This option delivers good value for replacing all four coils at once but carries the usual risk of variability common to aftermarket suppliers.
Best for: A reliability-focused buyer who prefers replacing all ignition coils at once to restore smooth running and avoid repeat visits; ideal for owners who want a budget-conscious, DIY-installable replacement for the Scion xB 2.4L.
Less Ideal for: Drivers seeking guaranteed factory-brand longevity or who prefer dealer-sourced parts should consider OEM or name-brand alternatives instead.
- Sold as a complete 4-pack so all cylinders are serviced at once
- Designed to match factory connector and mounting for straightforward installation
- Manufacturer claims higher spark energy than stock which can reduce misfires and improve throttle response
- Includes a 24-month warranty for added protection
- Some customers report early failures, so individual unit longevity can be inconsistent
- Aftermarket unit quality may vary compared with factory-brand coils
Verdict A cost-effective four-pack replacement for Scion xB 2.4L owners wanting to fix misfires and restore smooth performance, but expect some variability in long-term durability.
2. KAX Ignition Coil and Double Iridium Spark Plug Set (4-Pack)
| Part Interchange Info | Direct replacement for original equipment ignition coils in compatible vehicle models |
|---|---|
| Connector Gender | male |
| Automotive Fit Type | Vehicle Specific Fit |
| Manufacturer | KAX |
This KAX kit pairs four replacement ignition coils with double iridium spark plugs to restore reliable ignition on compatible 4-cylinder engines. It is sold as a vehicle-specific plug-and-play replacement intended to match factory fit and connector orientation for models like the Scion xB; installation is bolt-on so swapping the old coils and plugs is straightforward for a DIYer with basic hand tools. The listing highlights fast 0.1–0.2 second ignition response and high-voltage output, which in practice should help reduce hesitation, smooth idle, and clear misfire-related drivability issues. Practical benefits include individually packaged coils, corrosion resistance, and RF interference protection that supports stable combustion and sensor readings. Limitations to note are that longevity vs brand OEM parts is not guaranteed and some users report minor differences in plug gap requiring adjustment before install; also proper ECM relearn or scan-tool reset may be necessary after replacement to fully normalize engine behavior.
Best for: Convenience-driven owners who prioritize an all-in-one, ready-to-install repair that gets a misfiring or rough-running Scion xB back on the road quickly without parts hunting.
Less Ideal for: Buyers seeking a long-term, brand-name OEM replacement or those unwilling to perform a simple plug-gap check and ECM relearn should consider alternatives.
- Sold as a matched coil plus double iridium spark plug kit for a single cylinder bank, simplifying parts buying
- Designed for direct, bolt-on replacement to match factory connector and mounting points
- High-voltage output and RF interference protection aimed at reducing misfires and improving throttle response
- Individually packaged components and corrosion-resistant design make installation and storage easier
- Service life compared with long-established OEM brands is uncertain from the listing
- Some spark plugs may arrive with a smaller gap than factory spec and could require gapping before installation
Verdict A convenient matched coil-and-spark-plug kit for Scion xB owners needing a quick, plug-and-play fix, with minor pre-install checks recommended.
3. Denso 673-1307 Direct Ignition Coil
| Voltage | 12V |
|---|---|
| Connector Gender | female |
| Installation Type | Screw-In |
| Automotive Fit Type | Vehicle Specific Fit |
This Denso 673-1307 is a direct ignition coil built to replace the factory unit on compatible Scion xB vehicles. It installs in the spark plug bore to deliver high-energy ignition output without a separate high-tension cable, and its integrated driving circuit and diagonal windings are meant to keep the module compact and thermally stable. In real-world use it restores smooth idle and eliminates misfires that cause rough acceleration or a check engine light, and many users report improved throttle response after installation. As a factory-style replacement from a supplier that makes coils for automakers, it offers predictable fit and longevity compared with low-cost aftermarket units. The main limitation is that this is a single coil sold for one cylinder, so replacing multiple failed coils requires purchasing multiples, and it will only fit the Scion xB model years listed for this part number. Installation requires basic access to the ignition pack area and care to seat the coil and connector properly.
Best for: Performance-oriented owners who prioritize restoring factory-level ignition performance and consistent power delivery in their Scion xB.
Less Ideal for: Buyers looking for a multi-cylinder budget bundle or a universal coil that fits many makes and models should consider other options.
- Factory-quality direct replacement matched to application for reliable fit and performance
- Integrated driver circuit and compact stick-coil design reduce failure points and simplify installation
- Consistent high-energy ignition output improves idle smoothness and reduces misfires
- Sold as a single coil rather than a multi-pack which raises cost if multiple cylinders need replacement
- Fitment is specific to certain model years so buyers must confirm compatibility for their Scion xB
Verdict Choose this Denso coil to get factory-quality ignition performance for supported Scion xB years, but plan to buy one per cylinder if multiple coils need replacement.
4. lacarier Ignition Coil Pack (2.4L) compatible with Scion xB and select Toyota/Lexus models
| Compatible models | Scion xB 2010-2011 (2.4L) |
|---|---|
| Connector Gender | Male |
| Automotive Fit Type | Vehicle Specific Fit |
| Installation Type | Bolt-On |
This lacarier ignition coil pack is a straightforward, budget-oriented replacement for 2.4L engines including the Scion xB (2010–2011). It replaces common part numbers and is designed as a bolt-on factory-style coil to fix misfires, hard starts, rough idle, and degraded fuel economy caused by a failing coil. The housing uses rubber insulation intended to resist high under-hood temperatures and the unit is supplied with male connector fitment for vehicle-specific installation. Typical use is a one-for-one swap using basic hand tools; many owners pair coil replacement with new spark plugs. Practical benefits include clear fitment listings for the Scion xB, easy installation, and cost savings versus dealer parts. Limitations are typical for budget aftermarket coils: longevity may vary and some users report early failures, so you should verify connector and part-number compatibility before installation and be prepared to replace again sooner than a factory-quality coil if subjected to heavy use.
Best for: Budget-conscious owners who prioritize a low-cost, vehicle-specific replacement to restore reliable starting and smooth idling on a Scion xB 2.4L.
Less Ideal for: Drivers who want a long-term OEM-equivalent or performance upgrade should consider higher-end branded coils or dealer replacements instead.
- Direct replacement design listed for 2.4L Scion xB (2010–2011) for easy bolt-on installation
- Matches common OEM part numbers for straightforward part interchange
- Rubber-insulated housing formulated to resist heat and provide electrical insulation
- Lower cost than factory or premium aftermarket coils for budget repairs
- Build quality and longevity appear variable based on user reports
- Not presented as a premium or upgraded performance coil compared with higher-end aftermarket options
Verdict A low-cost, bolt-on replacement that gets a 2010–2011 Scion xB back to running smoothly but may not match OEM longevity.
5. Motorevo Ignition Coil Pack and Iridium Spark Plugs Set of 4
| Automotive Fit Type | Vehicle Specific Fit |
|---|---|
| Included Components | 4 x Ignition Coil Pack & Iridium Spark Plugs |
| OEM Equivalent Part Number | UF316T, 5C1293, DQ50103, 90080-19021, 909-1902265, 90919-02240, 6731306, GN10312, C1304, UF316, 7090 |
This Motorevo kit bundles four ignition coil packs with matching iridium spark plugs as a direct factory-quality replacement for the 1.5L L4 Scion xB (2004–2006). It installs like a stock set and is intended for owners repairing misfires or refreshing worn ignition components. Notable features called out by the maker include copper-core windings, ceramic insulation, and claimed higher spark conductivity for easier cold starts and smoother acceleration. In practice the main benefits are straightforward: a full-set replacement simplifies repairs, the plug and coil combination reduces the chance of cross-compatibility issues, and the kit is sized for bolt-in installation. Some buyers report reliable performance and easy fitment, while a minority noted initial units that caused misfires until swapped. That means quality control can vary and careful testing after installation is recommended. The kit includes a multi-year warranty for added reassurance, but buyers who need guaranteed OEM-level longevity or dealer-backed support may prefer factory parts or an established aftermarket brand.
Best for: A risk-averse mainstream buyer who wants a convenient, vehicle-specific replacement kit to restore reliable starting and smooth running without sourcing parts individually.
Less Ideal for: Buyers seeking dealer-level parts support or those who prioritize brand-name OEM assurance and long-term proven durability should consider factory replacements instead.
- Complete set of 4 coils and matching iridium spark plugs for one repair job
- Designed for direct vehicle-specific fit to minimize modification or reprogramming
- Copper-core and ceramic construction aimed at consistent spark delivery and heat resistance
- Includes a multi-year warranty for longer-term coverage against defects
- Some users report occasional out-of-the-box failures requiring replacement or swapping units
- Quality consistency appears variable compared with long-established OEM suppliers
Verdict A convenient, vehicle-specific coil-and-plug kit for Scion xB owners that restores ignition function affordably, though occasional quality variance means you should verify operation after install.
6. Denso Direct Ignition Coil 673-1308
| Model | Direct Ignition Coil |
|---|---|
| Installation Type | Bolt-On |
| Vehicle Service Type | Car, Truck |
| Position | Front |
This Denso direct ignition coil is a straight replacement designed to restore proper spark to misfiring cylinders in compatible Scion xB vehicles. It installs as a bolt-on unit in the spark plug bore and removes the need for separate high-tension leads thanks to Denso’s stick-coil architecture. In practice it is used to replace a failed coil when you have symptoms like misfires, rough idle, or a check engine light for a coil circuit. Notable features include a compact molded housing, a vehicle-specific fit, and Denso’s long-standing reputation for ignition components that match factory performance. The practical benefits are reliable combustion, reduced risk of repeated misfires, and simpler installation compared with more complex aftermarket units. Limitations to keep in mind are that there are two similar lengths/styles across years so you should verify the correct version for your Scion xB before ordering, and this is a single-coil replacement rather than a multi-pack which could raise per-coil cost if you plan to replace all coils at once.
Best for: Practical optimizers prioritizing a reliable, factory-quality replacement that restores engine smoothness without overspending; ideal for owners repairing a misfire or maintaining an older Scion xB.
Less Ideal for: Drivers seeking a bulk kit to replace every coil at once or those who prefer adjustable or performance-tuned ignition upgrades should look elsewhere.
- Factory-quality direct stick-coil design that fits into the spark plug bore for a tidy installation.
- Vehicle-specific fit reduces guesswork about compatibility for Scion xB applications listed by the manufacturer.
- Molded housing and compact profile simplify installation and resist environmental exposure.
- Widely used OEM supplier pedigree increases the likelihood of durable, consistent ignition output.
- Product comes as a single coil rather than a multi-pack, so replacing multiple worn coils can be less convenient.
- There are two similar variants across model years so you must confirm the correct physical length/style for your vehicle before installing.
Verdict A factory-quality, vehicle-specific replacement coil that gives Scion xB owners dependable, OEM-like performance at a sensible cost.
7. BDFHYK Ignition Coil Pack UF333 with Iridium Spark Plugs (Set of 4)
| Compatible part | UF333 |
|---|---|
| Installation type | Plug In |
| Includes | 4 coil packs + spark plugs |
| Vehicle service type | Car |
This kit pairs four BDFHYK ignition coil packs (UF333) with iridium spark plugs to replace worn ignition components on compatible 2.4L vehicles. Installation is plug-in style and typically performed when a misfire, rough idle, or weak acceleration indicates failing coils or old plugs. The coils are described as built with silicon steel cores, imported rubber seals, and varnished winding for longer life while the iridium plugs aim to improve cold starting and throttle response. In real-world use buyers report the kit restores smooth idle and resolves misfires after installation. The package is a convenient one-stop replacement so you can change all four coils and plugs together rather than sourcing parts separately. Limitations to note are fitment sensitivity for specific model years and engine variants and the product is an aftermarket option rather than a factory replacement part, so confirming the UF333 cross-reference before buying is necessary. Some users also reported needing vehicle-specific connectors or additional parts when OEM harnesses differ.
Best for: A balanced all-round buyer who wants a cost-effective, complete ignition service kit to restore driveability on an affected Scion xB 2.4L and prefers replacing coils and plugs in one job to reduce future issues.
Less Ideal for: Do not choose this if you prefer factory-brand parts, or if your Scion xB is a hybrid or uses a non-2.4L ignition system that does not match the UF333 cross-reference.
- Includes both four coil packs and iridium spark plugs for a complete ignition service
- Plug-in installation matches factory-style replacement for straightforward swap
- Aftermarket construction claims materials aimed at longer service life and improved sealing
- Iridium spark plugs can improve starting and throttle response compared with worn plugs
- Compatibility depends on exact year and engine variant so cross-checking part UF333 is required
- Aftermarket part may require separate harness connectors or minor adjustments on some vehicles
Verdict A practical, all-in-one aftermarket coil and plug kit that restores misfire-prone 2.4L Scion xB ignition systems if you confirm the UF333 fitment.
Choosing the Right Scion xB Ignition Coil: Key Factors to Consider
Fitment and Connector Compatibility
Correct physical fit and matching electrical connectors are fundamental because an ignition coil must seat and wire into the vehicle without modification. A coil that does not align with the mount points or uses a different connector type can create installation headaches and unreliable electrical contact.
Verifying OEM-style plugs and mounting tabs reduces the risk of vibration-induced failures and intermittent faults. When a coil requires adapter harnesses or drilling, the likelihood of installation error and future service problems increases.
Electrical Specifications
Primary and secondary resistance values, voltage output capability, and turn ratios affect how strongly the coil can generate spark across the plug gap. Matching those electrical specs to the vehicle requirements helps ensure consistent combustion and minimizes misfires.
Look for coils with documented resistance ranges and rated output voltage suitable for the engine. Coils with wide variance from expected specs can cause weak spark, poor fuel economy, and drivability issues.
Thermal Durability and Insulation
Ignition coils operate in a hot engine bay and must tolerate repeated thermal cycling without internal breakdown. High-quality insulation and heat-resistant housings reduce the chance of internal arcing and premature failure.
Materials and potting compounds that resist heat and moisture extend service life. Pay attention to stated operating temperature ranges and construction details that indicate robust thermal performance.
Ignition Boot and Spark Delivery
The boot that travels from the coil to the spark plug affects both the quality of the spark and resistance to contamination. A well-designed boot provides secure contact, resists moisture intrusion, and maintains proper spark gap transmission.
Boots with thicker insulation and corrosion-resistant contacts help prevent misfires and flashover under high-voltage stress. Consider whether the boot design simplifies installation and ensures a firm connection at the plug.
Durability and Construction Quality
Build quality influences long-term reliability more than marketing claims. Robust housings, reinforced terminals, and quality potting reduce the risk of cracks, moisture ingress, and electrical shorts over time.
Examine whether the coil uses high-grade plastics or composites and whether terminals appear solid and well-supported. Components that look fragile or poorly finished are more likely to fail under vibration and heat.
Ease of Installation and Serviceability
How straightforward a coil is to swap affects labor time and the risk of installation-related issues. Coils that align with factory mounting points and use standard torque values streamline DIY replacement and professional service.
Consider whether the part allows access to spark plugs without removing multiple components, and whether the boot and connector designs make it easy to seat and secure the coil. Parts that require special tools or complex disassembly can increase repair time and cost.
FAQ
What are common symptoms of a failing ignition coil on a Scion xB?
Common signs often include rough idle, engine misfires under load or at idle, and difficulty starting. You may also notice reduced fuel efficiency or a check engine light with misfire-related trouble codes. Symptoms can vary by severity and sometimes resemble other ignition or fuel issues.
Can I test an ignition coil myself?
Yes, you can perform basic checks using a multimeter to measure primary and secondary resistance and compare values to expected ranges. Visual inspection for cracks, corrosion, or carbon tracking also helps. More definitive tests use an oscilloscope or a coil tester, which professionals typically use for precise diagnosis.
Is it necessary to replace all ignition coils at once?
Not necessarily. If one coil fails and others show normal electrical readings and no symptoms, replacing only the faulty unit can be reasonable. However, if coils are original and have high mileage, replacing multiple units can reduce the chance of another failure shortly after a repair.
Will replacing an ignition coil fix a misfire?
Replacing a defective coil often resolves misfires caused solely by weak or intermittent spark. Misfires can also stem from spark plugs, fuel delivery, compression issues, or wiring, so a comprehensive diagnosis helps ensure the coil is the true cause.
How long do ignition coils typically last?
Coil lifespan varies depending on driving conditions, heat exposure, and quality. Many coils last several years or tens of thousands of miles, but elevated heat, oil contamination, or persistent electrical stress can shorten service life. Regular inspection helps catch early signs of wear.
How We Chose the Best Scion xB Ignition Coil
We narrowed the field to components that meet strict fitment and electrical-performance standards for the Scion xB. Key evaluation criteria included connector and mounting compatibility with the vehicle, coil primary and secondary resistance ranges, and thermal durability under typical engine bay temperatures. We also considered construction quality such as housing materials and internal insulation, plus serviceability factors like ignition boot design and ease of installation. We excluded units that lacked documented compatibility with the Scion xB or that had inconsistent electrical specifications. Units with unclear wiring diagrams, nonstandard connectors, or insufficient thermal ratings were not considered. The final selections balance reliable electrical performance, durable construction, and straightforward installation to reduce the chance of early failure and installation issues.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize fitment and electrical specifications when selecting a replacement Scion xB ignition coil, as those factors most directly affect spark quality and drivability. Also consider thermal durability and build quality to reduce the chance of premature failure. Balance ease of installation with long-term reliability based on vehicle age and service history. When in doubt, use diagnostic testing to confirm the coil is the source of a problem before replacing multiple components.
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