MAS Ignition Coil Pack for 1.8L 1ZZ-FE Toyota/GM – Direct-Fit, Heat-Resistant

MAS Ignition Coil Pack is a direct-fit replacement coil designed to restore reliable spark delivery for 1.8L 1ZZ-FE engines in compatible Toyota and GM models.

When an ignition coil begins to fail it can cause rough starts, misfires, reduced fuel economy, and trigger the check engine light. This MAS coil pack is engineered to match OE fitment and electrical characteristics for 1ZZ-FE engines, offering an accessible swap for vehicles that list part numbers such as 90919-02239, UF247, or 5C1074. Built from temperature‑tolerant materials and precise windings, it targets common failure modes—cracked insulation, pinholes, and degraded wire—which often lead to intermittent spark or complete coil failure.

How will this MAS coil pack affect starting and idle behavior?

Replacing a worn coil pack with this MAS unit typically improves engine start-up consistency and smooths idle transitions by restoring even spark to the cylinders. Drivers often notice quicker cranks and reduced stalling at low speeds once misfires are resolved.

• Restores consistent spark timing for smoother idle
• Reduces long crank times and hard starts
• Minimizes intermittent misfires that cause rough running

What vehicles and part numbers does this MAS coil pack fit?

This coil pack is manufactured to fit a range of 1.8L 1ZZ-FE engines across Toyota and compatible GM models. Verify compatibility by checking your vehicle year, engine code, and the OEM or aftermarket part numbers before ordering.

• Fits Toyota Corolla (1999–2010), Matrix (2003–2008), Celica (2000–2005), MR2 Spyder (2000–2005)
• Fits Chevrolet Prizm (2000–2002) and Pontiac Vibe (2003–2006)
• Cross-references: 90919-02239, UF247, 5C1074, 90080-19015 and related numbers

What construction and material benefits does this replacement offer?

MAS uses high‑tolerance wire and heat-resistant coatings to reduce the typical wear points that cause coil failure. The design focuses on preventing insulation breaches and wire degradation that lead to pinholes and eventual spark loss.

• High-temperature wire insulation to resist cracking and porosity
• Precision windings and internal design for stable spark output
• Durable housing and connector interfaces for secure electrical contact

How does replacing the coil pack affect drivability and other components?

Installing a new coil pack can eliminate misfire-related problems that stress other systems, such as catalytic converters and ignition components. While it won't fix unrelated fuel or sensor issues, a proper coil restores ignition balance and helps prevent long-term damage caused by persistent misfires.

• Helps prevent spark plug fouling and uneven combustion
• Reduces load on catalytic converter caused by unburned fuel
• Can improve fuel economy by restoring proper cylinder firing

Who is this for: This MAS ignition coil pack is intended for DIY mechanics, independent shops, and fleet managers who maintain 1.8L 1ZZ-FE Toyota and compatible GM vehicles that show ignition-related symptoms or match the listed cross-reference numbers. It’s a practical replacement for owners seeking an OE-style fit and improved resistance to heat-related coil degradation without altering engine calibration or ignition timing.