AULINK Ignition Coil Pack 4PCS for 1.4L L4 Engines — Buick Encore/Chevy Trax, OEM Fit & Tested

AULINK 4PCS Ignition Coil Pack (1.4L L4) is a direct-fit replacement set engineered to restore spark delivery for Buick Encore, Chevy Trax, Cruze, Sonic and compatible 1.4L L4 GM engines.

If your vehicle with a 1.4L L4 engine is showing rough idle, reduced fuel economy, misfires or check-engine codes related to ignition, a worn coil pack can be the cause. These four AULINK coils are built to meet OEM cross-reference numbers (UF-669, D-521C, C-1810 and others) and are designed for plug-and-play swap-in with compatible Buick, Chevy and Cadillac models. They pair with compatible spark plugs (XP3922) and arrive from TS16949-certified production with full function and leakage testing.

How will these coils affect engine performance?

Replacing degraded ignition coils can improve combustion consistency, reduce misfires and help restore fuel efficiency. The AULINK coils use heat- and impact-resistant materials and trivalent metal-plated plug compatibility to maintain reliable spark under load.

• Restores reliable high-voltage spark to each cylinder
• Reduces intermittent misfires and engine hesitation
• Supports stable idle and smoother acceleration

Which vehicles and part numbers do these coils fit?

These AULINK coils are targeted at GM 1.4L L4 engines and list multiple OEM cross-references for easy compatibility checking. They are suitable for a range of Buick, Chevy and Cadillac models produced across the 2011–2021 model years when equipped with the 1.4L engine.

• Compatible OEM numbers: UF-669, D-521C, C-1810, 10606E and others
• Fits: Buick Encore (2013–2021), Chevy Trax (2013–2021), Cruze, Sonic, Volt and Cadillac ELR where 1.4L L4 applies
• Works with recommended spark plug XP3922

What quality controls and warranty cover these coils?

AULINK manufactures these coils in TS16949-certified facilities with full functional and leakage testing prior to shipment. Each pack comes with a limited service coverage to protect against early failures under normal use.

• Produced in TS16949-certified manufacturing plants
• 100% function and leakage tested before release
• Service support: 1 year or 50,000 km coverage

How do I install the coil pack and what should I inspect?

Installation is typically straightforward: remove the engine cover (if equipped), disconnect the battery, unplug the old coil connectors and unbolt the coils, then fit the new AULINK units and reassemble. Inspect spark plugs and wiring harnesses while you’re replacing coils to ensure a durable repair.

• Recommended to replace spark plugs (XP3922) if worn or overdue
• Check ignition wiring and connector seals for corrosion or damage
• Tighten coil bolts to factory torque and ensure firm electrical connections

Who is this for: Drivers and DIY mechanics who own GM vehicles with the 1.4L L4 engine and are experiencing ignition-related issues, or anyone performing scheduled ignition maintenance. AULINK’s 4-piece kit is intended for those seeking OEM-referenced replacements that simplify fitment checks and offer tested performance and a one-year/50,000 km support window.