BDFHYK UF343 ignition coil and 2647 spark plug kit for Mazda Miata

BDFHYK UF343 ignition coil OE-style replacement for Miata 1.8L

BDFHYK 2647 iridium spark plugs with UF343 ignition coil kit

BDFHYK Mazda Miata 1.8L ignition coil and spark plug kit

BDFHYK Miata UF343 coil pack with iridium spark plugs

BDFHYK Mazda Miata ignition system service kit

BDFHYK UF343 coil and 2647 iridium plug set

BDFHYK 1 Ignition Coil UF343 and 4 Iridium Spark Plug 2647 For Mazda Miata 1999-2000 1.8L L4

$74.49

Type Ignition Coil + Spark Plug Set
SKU BDDLZ-BD-05-11312-CK
OE Number For Coil: BP4W1810X, BP4W1810XA, BP4W1810XB, BP4W1810XB9U, UF343
OE Number For Spark plug:2647

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Technical Specifications

Brand & Model	BDFHYK UF343 Ignition Coil & 2647 Iridium Spark Plug Kit
SKU	BDDLZ-BD-05-11312-CK
Package Includes	1x BDFHYK ignition coil pack (UF343) + 4x Iridium Spark Plugs (2647)
Replacement Type	OE-style aftermarket ignition coil and spark plug service kit
Ignition Coil OE	BP4W1810X, BP4W1810XA, BP4W1810XB, BP4W1810XB9U, UF343
Spark Plug OE	2647
Core Materials	High-grade silicon steel core, high-temperature rubber, varnished copper wire
Spark Plug Specs	Iridium electrode with ceramic insulator
Mazda Miata Fitment	Mazda Miata 1999-2000 1.8L L4 applications; confirm connector, mounting points, coil body, and UF343 / listed OE reference before ordering
Engine Compatibility	Mazda Miata 1.8L L4 listed applications
Critical Fitment Note	Do NOT order by model name alone. Not for vehicles using a different engine, coil connector, mounting style, spark plug specification, or OE number
Common Symptoms	Engine misfire, rough idle, hard start, hesitation, poor acceleration, poor fuel economy, check engine light
Pre-Installation Check	Inspect plug gap, worn spark plugs, connector condition, wiring, ground, fuel delivery, vacuum leaks, and diagnostic trouble codes before replacement
Important Note	This is not a factory-branded Mazda part. Always compare with the original part and follow vehicle-specific service procedures

Product Overview

This BDFHYK UF343 ignition coil and 2647 iridium spark plug kit is designed for listed 1999-2000 Mazda Miata 1.8L L4 applications. The kit includes 1 ignition coil and 4 iridium spark plugs for ignition service when the original coil or spark plugs have been diagnosed as the cause of misfire, rough idle, hard start, hesitation, poor acceleration, poor fuel economy, or an ignition-related check engine light.

Before ordering, confirm the vehicle year, model, engine, OE / interchange number, connector shape, mounting points, and original part design. Do not order by model name alone.

Vehicle Fitment

This listing is for the listed Mazda Miata application below. Fitment can vary by trim, production date, and original ignition system, so compare your original part before purchase.

Make	Model	Year	Engine	Buyer Check
Mazda	Miata	1999-2000	1.8L L4	Confirm connector, mounting points, coil body, and UF343 / listed OE reference.

Fitment note: This listing is not intended for vehicles that use a different engine, coil connector, mounting style, spark plug specification, or OE number.

Kit Includes and Reference Numbers

1 ignition coil, reference UF343.
4 iridium spark plugs, reference 2647.
Coil OE / interchange references: BP4W1810X, BP4W1810XA, BP4W1810XB, BP4W1810XB9U, UF343.
Designed as an OE-style aftermarket replacement for compatible applications.

Common Symptoms to Inspect Before Replacement

Engine misfire or cylinder-specific misfire code.
Rough idle, shaking, or unstable idle speed.
Hard starting or hesitation during acceleration.
Poor fuel economy or reduced engine response.
Check engine light related to ignition or misfire diagnosis.

Ignition System Checks Before Installation

Check for worn spark plugs, incorrect spark plug gap, oil contamination, or damaged boots.
Inspect the ignition coil connector for loose fitment, corrosion, broken locking tabs, or wiring damage.
Review diagnostic trouble codes before replacing parts. A misfire code can point to a cylinder, but it does not always confirm a failed coil.
Confirm there are no fuel injector, vacuum leak, compression, ground, battery voltage, or ECM / PCM signal issues causing similar symptoms.

Before You Order

Confirm your year, make, model, 1.8L L4 engine, and trim.
Compare UF343 and the listed OE / interchange references with your original ignition coil.
Compare 2647 with the required spark plug reference for your vehicle.
Confirm that you need 1 ignition coil and 4 spark plugs, not a multi-coil set.
This is an OE-style aftermarket replacement, not a factory-branded Mazda part.

Q: Which vehicle does this ignition coil and spark plug kit fit?

A: This kit is listed for 1999-2000 Mazda Miata 1.8L L4 applications. Confirm year, model, engine, trim, and original part before ordering.

Q: Does this kit fit every Mazda Miata?

A: No. This listing is for the listed 1999-2000 1.8L L4 application. Other model years or ignition configurations may use different parts.

Q: What is included in this ignition kit?

A: The kit includes 1 UF343 ignition coil and 4 iridium spark plugs with reference 2647. It is not a full multi-coil set.

Q: Which OE or interchange numbers should I compare?

A: Compare BP4W1810X, BP4W1810XA, BP4W1810XB, BP4W1810XB9U, and UF343 with the original ignition coil. For the spark plugs, compare reference 2647.

Q: Will this fix a misfire or check engine light?

A: It may help when the original ignition coil or spark plugs have been diagnosed as faulty. Misfires can also come from wiring, connectors, fuel injectors, vacuum leaks, compression issues, or control signal problems.

Q: Is this a factory OEM Mazda part?

A: No. This is a BDFHYK OE-style aftermarket replacement, not a factory-branded Mazda part.

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:

Mon–Fri 9:00–18:00 (GMT+8)

Mon–Fri 19:00–04:00 (UTC−6 / CST)

Manufacturing Standards

Direct Factory Supply, Cost Saving
Integrated R&D, production, and warehousing. Eliminate middleman markups: same quality at lower prices, superior quality at same prices.

Precision Inspection, Commitment to Excellence
Rigorous inspection process, international certification standards. Each product includes individual inspection.

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.