TRQ Ignition Coil Set Compatible with 2012-2015 Scion iQ - 4 Pack

In this review the TRQ Ignition Coil Set is evaluated as a direct replacement option for owners of the 2012-2015 Scion iQ with the L4 1.3L engine. The bottom line: this 4 piece kit is aimed at drivers who want a straightforward, ready-to-install repair that restores firing consistency without custom work. The set's biggest strength is that each coil is pre-assembled to match original equipment fit, making it a practical choice for DIY mechanics and independent shops seeking a cost-effective way to replace worn coils and reduce misfires.

Key Features

• Complete 4-piece kit: Includes four ignition coils so users can replace all cylinders at once to prevent electrical output imbalance and ensure consistent engine performance.
• Direct replacement design: Pre-assembled components are designed to match the original equipment, which eliminates the need for modifications and saves installation time.
• Durable construction: High dielectric epoxy and reinforced bobbins are used to extend service life and maintain reliable electrical insulation under heat and vibration.
• Protective shell: Rubber, silicone, or phenolic resin boots prevent premature wear of the coil-to-plug connection and help keep out contaminants.
• Fitment focus: Reference numbers provided and a compatibility chart help confirm fit for the 2012-2015 Scion iQ L4 1.3L before purchase.

Who It's For

This set is best for Scion iQ owners and independent repairers who prefer replacing ignition coils in a full set to avoid mismatched electrical output and intermittent misfires. It is also useful for drivers who want a direct-fit, pre-assembled option to cut down on labor time and reduce the chance of installation errors.

It is less appropriate for vehicles outside the stated fitment or for owners who require OE-branded coils for warranty or dealership service records. If the vehicle exhibits issues beyond ignition coil failure, such as fuel or ECU faults, this kit alone may not resolve the problem.

Pros & Cons

Pros

• Good value for money when replacing all coils at once, reducing the risk of uneven performance.
• Easy installation due to direct-fit, pre-assembled design that bolts and plugs in without modification.
• Improved throttle response and fewer acceleration hiccups reported by some owners after installation.

Cons

• Some users report mixed long-term reliability, so occasional coil failures have been noted in user feedback.

Specifications

Kit Contents	4 Ignition Coils
Fitment	2012-2015 Scion iQ L4 1.3L
Reference Numbers	90919-02257; 9091902257; GN10909; UF-663
Coil Color	Black
Coil Type	Direct Replacement
Protective Boot	Rubber, Silicone, or Phenolic Resin
Quantity	4 Piece

Our Verdict

The TRQ Ignition Coil Set is a practical, cost-conscious choice for Scion iQ owners who need a straightforward repair that restores engine smoothness and responsiveness. Its direct-fit, pre-assembled design saves installation time and the complete four-coil approach helps avoid output imbalances, making it a strong value for DIYers and independent shops despite some reports of mixed long-term reliability.

Frequently Asked Questions

Will this fit my 2013 Scion iQ?
Yes, it is listed as compatible with 2012-2015 Scion iQ models with the L4 1.3L engine; confirm fitment against the vehicle before purchase.

Do I need to replace all four coils at once?
Replacing all four is recommended to prevent electrical output imbalance between new and old coils, which can cause uneven performance.

Are tools or modifications required for installation?
No special modifications are required; the coils are pre-assembled as direct replacements so standard hand tools used for ignition coil replacement are sufficient.