BDFHYK UF666 ignition coil and 6619 iridium spark plug kit for Subaru Legacy Outback and Tribeca

6 UF666 ignition coils and 6 6619 iridium spark plugs for 3.6L H6

BDFHYK UF666 coil pack and 6619 spark plug service set

UF666 ignition coil replacement set for listed Subaru Legacy Outback and Tribeca 3.6L H6 applications

6619 iridium spark plugs with UF666 ignition coils for ignition service

BDFHYK OE-style aftermarket UF666 ignition coil and spark plug kit

UF666 and 6619 reference ignition service components for Subaru Legacy Outback and Tribeca

BDFHYK Ignition Coil UF666 & 6619 Iridium Spark Plug for Subaru Legacy 2010-2019 3.6L H6,Sets of 6

$108.99

Type Ignition Coil + Spark Plug Set
SKU BDDLZ-BD-05-11377-CK
OE Number For Coil: 22433AA610, 22433AA611, 22433AA612, UF-666, UF-682, UF666, UF682, GN10666, COP584, 1788537, C864, 49125
OE Number For Spark plug:6619

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Technical Specifications

Brand	BDFHYK
Product Type	Ignition Coil + Iridium Spark Plug Set
Primary Coil Reference	UF666
Spark Plug Reference	6619
Package Quantity	6 ignition coils + 6 iridium spark plugs
Includes	6 Ignition Coils + 6 Iridium Spark Plugs
Ignition Coil Design	Coil-on-plug OE-style aftermarket replacement
Spark Plug Construction	Iridium electrode with ceramic insulator
Engine	3.6L H6
Listed Vehicle Fitment	Subaru Legacy 2010-2019 3.6L H6; Subaru Outback 2010-2019 3.6L H6; Subaru Tribeca 2010-2014 3.6L H6
OE / Interchange References	UF666, UF-666, UF682, UF-682, 22433AA610, 22433AA611, 22433AA612, GN10666, COP584, 1788537, C864, 49125
Common Service Scenarios	Cylinder misfire diagnosis, rough idle, hard starting, hesitation under load, and six-cylinder ignition maintenance
Fitment Checks	Confirm exact model year and 3.6L H6 engine, OE/reference number, connector shape and keying, coil body, mounting point, boot profile, spark plug reference, and service quantity
Installation Checks	Inspect spark plugs, coil boots, connectors, wiring, plug wells, oil or moisture; use Subaru service specifications for spark plug gap and tightening torque
Important Note	OE-style aftermarket service components; ignition replacement does not correct every misfire or drivability condition

UF666 Ignition Coil & 6619 Iridium Spark Plug Kit for Subaru Legacy, Outback & Tribeca 3.6L H6

This BDFHYK ignition service kit combines 6 UF666-style ignition coils with 6 6619 iridium spark plugs for listed Subaru 3.6L H6 applications. Rough idle, hard starting, hesitation under load, or a cylinder-specific misfire can involve coils or plugs, while wiring, fuel delivery, intake leaks, sensors, compression, and other mechanical conditions can produce similar symptoms.

Subaru Legacy, Outback & Tribeca 3.6L H6 Fitment for UF666 / 6619

Model	Years	Engine
Legacy	2010-2019	3.6L H6
Outback	2010-2019	3.6L H6
Tribeca	2010-2014	3.6L H6

What Is Included in the UF666 & 6619 Subaru 3.6L H6 Set?

6 UF666-style coil-on-plug ignition coils
6 6619 iridium spark plugs
Matched 6-coil and 6-plug service quantity for the listed H6 applications

UF666 Coil and 6619 Spark Plug Reference Numbers

Ignition coil: UF666, UF-666, UF682, UF-682, 22433AA610, 22433AA611, 22433AA612, GN10666, COP584, 1788537, C864, 49125.

Spark plug: 6619.

UF666 / 6619 Service Scenarios for Subaru 3.6L H6

Rough Idle or Cylinder Misfire

Inspect the affected plug, coil, connector, wiring, boot, and plug well. A misfire code should guide diagnosis rather than automatically trigger replacement of every coil.

Hesitation Under Engine Load

A marginal ignition component may become more noticeable during acceleration, climbing, or other higher-load conditions. Check the related cylinder and plug condition first.

Six-Cylinder Ignition Maintenance

The 6+6 quantity supports a matched-count H6 ignition service when the exact listed application and original components match.

How to Confirm UF666 and 6619 Fitment Before Ordering

Confirm Legacy, Outback, or Tribeca year and exact 3.6L H6 engine.
Compare UF666 / UF682 and listed OE references with the original coil.
Check connector keying, body, mounting area, and boot profile.
Confirm the original spark plug or service specification matches 6619.

Installation Checks for the UF666 & 6619 Subaru H6 Kit

Work on a cool engine and keep debris out of plug wells.
Inspect wiring, connectors, boots, oil, and moisture.
Use Subaru service specifications for plug gap and tightening torque.
Recheck stored or returning misfire codes after service.

Important: These are BDFHYK OE-style aftermarket service components, not factory-branded Subaru parts. Continue diagnosis if symptoms remain.

Q: What is included in the UF666 and 6619 Subaru ignition kit?
A: The kit includes 6 UF666-style ignition coils and 6 6619 iridium spark plugs.

Q: Which Subaru applications are listed?
A: Listed applications are Legacy 2010-2019, Outback 2010-2019, and Tribeca 2010-2014 with the matching 3.6L H6 engine.

Q: Is this a complete H6 ignition service quantity?
A: The package contains 6 coils and 6 spark plugs, matching a six-cylinder service quantity when the exact 3.6L H6 application is confirmed.

Q: Which UF666 coil references should be compared?
A: Compare UF666, UF682, 22433AA610, 22433AA611, 22433AA612, and the other listed interchange references with the original coil.

Q: Which spark plug reference should be checked?
A: Compare the original plug or service information with 6619.

Q: Can weak coils or worn plugs contribute to rough idle or a misfire?
A: Yes, but wiring, fuel delivery, intake leaks, sensors, compression, and other conditions can cause similar symptoms.

Q: Should all six coils and plugs always be replaced together?
A: Not automatically. Diagnose first. The matched-count kit is useful when both component groups are due for service.

Q: What should be checked before installing UF666 coils?
A: Confirm connector keying, coil body, mounting area, boot profile, OE/reference number, exact 3.6L H6 engine, and original part shape.

Q: What should be checked before installing 6619 spark plugs?
A: Confirm the plug reference and follow Subaru service specifications for gap and tightening torque.

Q: What if a misfire remains after ignition service?
A: Continue diagnosis of wiring, injectors, fuel pressure, intake or vacuum leaks, sensors, compression, and related mechanical conditions.

Q: Are these factory Subaru parts?
A: No. These are BDFHYK OE-style aftermarket service components, not factory-branded Subaru parts.

Returns & Refunds

We accept returns within 30 days of delivery for eligible items. If the product is unused and in original condition, you may request a return according to our refund policy. Full policy details: View Refund Policy . We recommend contacting our support team before initiating a return to ensure the fastest resolution.

Customer Support

If you purchased the wrong part, received an incompatible item, or need installation assistance, please contact us directly.

Email: service@bdfhyk.com

Business Hours:

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Mon–Fri 19:00–04:00 (UTC−6 / CST)

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Before vs After Replacement

Replacing worn ignition coils and spark plugs helps restore stable ignition and smoother engine performance.

BEFORE

Rough Idle & Engine Vibration Noticeable engine shaking while idling. Irregular exhaust flow may indicate unstable ignition performance.

AFTER

Fast Start & Stable Idle IMore consistent spark delivery reduces misfires and stabilizes idle speed.

BEFORE

Sluggish Acceleration Weak throttle response at lower RPM. Vehicle may feel underpowered.

AFTER

Enhanced Power Response Improved throttle response and smoother acceleration

BEFORE

Increased Fuel Consumption Poor combustion can lead to higher fuel usage.

AFTER

Improved Fuel Efficiency Optimized ignition supports more efficient combustion.

Performance improvements may vary depending on vehicle condition.