BDFHYK UF821 ignition coil and 91970 iridium spark plug kit for Buick Cascada

4 UF821 ignition coils and 4 91970 iridium spark plugs for 1.6L L4

BDFHYK UF821 coil pack and 91970 spark plug service set

UF821 ignition coil replacement set for listed Buick Cascada 1.6L L4 applications

91970 iridium spark plugs with UF821 ignition coils for ignition service

BDFHYK OE-style aftermarket UF821 ignition coil and spark plug kit

UF821 and 91970 reference ignition service components for Buick Cascada

BDFHYK 4 Ignition Coil UF821 and 4 Iridium Spark Plug 91970 for Buick Cascada 1.6L L4 2016-2019

$80.99

Type Ignition Coil + Spark Plug Set
SKU BDDLZ-BD-05-11376-CK
OE Number For Coil: GN10796, UF821
OE Number For Spark plug:91970, ILNAR8B7G

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Technical Specifications

Brand	BDFHYK
Product Type	Ignition Coil & Iridium Spark Plug Kit
Primary Coil Reference	UF323
Spark Plug Reference	4996
Package Quantity	8 Pieces Total
Includes	4 Ignition Coils + 4 Iridium Spark Plugs
Ignition Coil Design	Coil-on-Plug Style
Spark Plug Construction	Iridium Center Electrode with Ceramic Insulator
Engine	2.4L L4; 2.7L L4
Listed Vehicle Fitment	2000-2004 Toyota Tacoma 2.4L/2.7L L4; 2000 Toyota 4Runner 2.7L L4
OE / Interchange References	UF323, C1305, 5C1304, E353, 52-1690, IC453, 90919-02237, 9091902237
Common Service Scenarios	Rough idle, cold-start shaking, hard starting, cylinder-specific misfire, hesitation under acceleration, load-related misfire, scheduled ignition maintenance
Fitment Checks	Confirm year, model, 2.4L/2.7L L4 engine, UF323 or 90919-02237 coil reference, 4996 spark plug reference, and original connector/component shape before ordering.
Installation Checks	Inspect connectors, coil boots and plug wells; keep plug wells clean and dry; verify plug reference; install spark plugs to vehicle service specifications; fully seat coils and electrical connectors.

UF323 Ignition Coil & 4996 Iridium Spark Plug Kit for Toyota Tacoma / 4Runner L4

The BDFHYK UF323 ignition coil and 4996 iridium spark plug kit combines four coil-on-plug ignition coils with four iridium spark plugs for the listed Toyota four-cylinder applications. The 4-coil + 4-plug quantity matches a complete ignition service set for the confirmed 2.4L and 2.7L L4 fitments below.

UF323 / 4996 Fitment for Toyota Tacoma and 4Runner

Year	Model	Engine
2000–2004	Toyota Tacoma	2.4L L4
2000–2004	Toyota Tacoma	2.7L L4
2000	Toyota 4Runner	2.7L L4

Confirm the exact year, model and engine before ordering. Compare the original ignition coil with UF323 / 90919-02237 and verify spark plug reference 4996.

What Is Included in the UF323 & 4996 Toyota Ignition Set?

4 BDFHYK UF323 OE-style aftermarket ignition coils
4 4996 iridium spark plugs
Complete four-cylinder service quantity for the listed applications

UF323 Coil and 4996 Spark Plug Reference Numbers

Ignition coil references: UF323, C1305, 5C1304, E353, 52-1690, IC453, 90919-02237 / 9091902237.

Spark plug reference: 4996.

UF323 / 4996 Service Scenarios for Toyota L4 Engines

Rough Idle or Cold-Start Shaking

Uneven idle or shaking shortly after startup may involve a weak ignition coil, worn spark plug or another ignition-system issue. Inspect the coil connectors, boots, plug wells and spark plugs before replacing parts.

Hesitation or Misfire Under Acceleration

A load-related misfire or hesitation during acceleration can be associated with insufficient ignition output, but fuel delivery, injectors, intake leaks, sensors, compression and mechanical timing should also be considered during diagnosis.

Complete Four-Cylinder Ignition Maintenance

For the listed 2.4L and 2.7L L4 applications, four ignition coils and four spark plugs provide a full-cylinder service quantity when a complete ignition refresh is appropriate.

A diagnostic trouble code by itself does not prove an ignition coil has failed. Confirm the affected cylinder and inspect wiring, connectors, injectors, fuel delivery, vacuum or intake leaks, sensors, compression and mechanical condition when symptoms remain.

How to Confirm UF323 and 4996 Fitment Before Ordering

Confirm the exact Toyota model and model year.
Confirm a 2.4L or 2.7L L4 engine as listed above.
Compare the original ignition coil with UF323 or 90919-02237 / 9091902237.
Verify spark plug reference 4996.
Compare connector shape, coil body and boot profile with the original components.

Installation Checks for the UF323 / 4996 Toyota Kit

Disconnect electrical connectors carefully and inspect terminals for corrosion, heat damage or looseness.
Inspect coil boots and spark plug wells for oil, coolant, moisture or debris.
Keep the plug wells clean and dry before installing the replacement components.
Verify the 4996 spark plug reference and follow vehicle service information for installation specifications.
Fully seat each ignition coil and electrical connector before restarting the engine.
If a misfire remains after service, continue diagnosis rather than assuming another new coil is required.

For additional service guidance, see when to replace ignition coils and spark plugs together and how to test an ignition coil.

Q: What is included in this UF323 and 4996 kit?

A: The kit includes 4 UF323 ignition coils and 4 4996 iridium spark plugs.

Q: Which vehicles are listed for this kit?

A: It is listed for 2000-2004 Toyota Tacoma 2.4L/2.7L L4 and 2000 Toyota 4Runner 2.7L L4 applications.

Q: Which engines are covered?

A: The confirmed engine applications are 2.4L L4 and 2.7L L4 as shown in the fitment section.

Q: Is the 4-coil and 4-plug package a complete service quantity?

A: Yes. Four coils and four spark plugs provide a full-cylinder ignition service quantity for the listed four-cylinder applications.

Q: Which ignition coil references should I compare?

A: Compare UF323 and references including C1305, 5C1304, E353, 52-1690, IC453 and 90919-02237 / 9091902237 with the original coil.

Q: Which spark plug reference is included?

A: The included iridium spark plug reference is 4996.

Q: Can worn coils or spark plugs contribute to a misfire or rough idle?

A: Yes. Coil or spark plug condition may contribute to rough idle, hard starting, hesitation or a cylinder-specific misfire, but other ignition, fuel, intake and mechanical causes should also be diagnosed.

Q: Should all ignition coils and spark plugs always be replaced together?

A: Not always. Replacement should follow condition, diagnosis and service needs. This kit provides a complete four-cylinder quantity when full-set ignition maintenance is appropriate.

Q: What should be checked before installing the ignition coils?

A: Compare the UF323 coil and connector with the original parts, inspect terminals and coil boots, and check the spark plug wells for oil, coolant, moisture or debris.

Q: What should be checked before installing the spark plugs?

A: Verify reference 4996, keep the plug wells clean and dry, inspect the threads and follow vehicle service information for installation specifications.

Q: What should be checked if a misfire remains after installation?

A: Continue diagnosis of wiring, connectors, injectors, fuel delivery, vacuum or intake leaks, sensors, compression and mechanical timing. A trouble code alone does not prove a coil has failed.

Q: Are these factory-branded Toyota parts?

A: No. These are BDFHYK OE-style aftermarket service components intended to match the listed applications and references.

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

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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.