BDFHYK UF808 ignition coil and 91121 spark plug set for Smart Fortwo

BDFHYK UF808 ignition coil OE-style replacement for Smart 0.9L

BDFHYK 91121 iridium spark plugs with UF808 ignition coil set

BDFHYK Smart Fortwo 0.9L ignition coil and plug kit

BDFHYK UF808 coil connector and body detail for Smart Fortwo

BDFHYK ignition coils and spark plugs for Smart Fortwo service

BDFHYK OE-style Smart Fortwo 0.9L ignition coil set

BDFHYK 3PCS Ignition Coil Pack UF808 + 3 Iridium Spark Plugs 91121 for Smart Fortwo 2016-2017 0.9L L3

$57.99

Type Ignition Coil + Spark Plug Set
SKU BDDLZ-BD-05-11375-CK
OE Number For Coil: UF-808, C-987, UF808, C987, 2819060000, 22433-2428R, 224332428R, 8201154128, 0986221079
OE Number For Spark plug:91121

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Technical Specifications

Brand & Model	BDFHYK UF808 Ignition Coil & 91121 Iridium Spark Plug Set
Package Includes	3x BDFHYK ignition coils (UF808) + 3x iridium spark plugs (91121)
Replacement Type	OE-style aftermarket ignition coil and spark plug service kit
Ignition Coil OE	UF808, UF-808, C987, C-987, 2819060000, 22433-2428R, 224332428R, 8201154128, 0986221079
Spark Plug OE	91121
Smart Fortwo Fitment	Smart Fortwo 2016-2017 0.9L L3 listed applications
Fitment Checks	Confirm 0.9L L3 engine, UF808-style coil, 91121 plug reference, connector shape, coil body, mounting depth, plug reach, seat type, and gap requirement
Common Symptoms	Hard start, rough idle, hesitation, misfire symptoms, reduced power, poor fuel economy, check engine light
Diagnostic Notes	Symptoms may also come from fuel quality, intake leaks, wiring faults, sensor issues, or compression problems
Installation Notes	Install on a cool engine, inspect old plugs for fouling, confirm plug gap, and follow Smart service torque guidance
Critical Note	Do not order by Smart Fortwo model name alone. Year, 0.9L L3 engine, OE reference, connector, and plug specification must match
Important Note	This is not a factory-branded Smart part

UF808 Ignition Coil and 91121 Spark Plug Set for Smart Fortwo 0.9L

This BDFHYK UF808 ignition coil and 91121 iridium spark plug set is designed for listed 2016-2017 Smart Fortwo 0.9L L3 applications. It is intended for ignition service when the original coils or spark plugs have been diagnosed as worn, weak, damaged, or related to misfire symptoms. Smart owners should confirm the 0.9L L3 engine, UF808-style coil, 91121 plug reference, connector shape, and 3-coil / 3-plug service quantity before ordering.

Vehicle Fitment for This Smart Fortwo Ignition Kit

Make	Model	Listed Years	Engine	Fitment Check
Smart	Fortwo	2016-2017	0.9L L3	Confirm UF808-style coil, 91121 spark plug reference, connector shape, and original ignition layout.

Fitment note: This listing is for the listed 0.9L L3 application. Do not use it for other Smart engines unless the original coil and spark plug references match.

When This Smart Fortwo Ignition Kit May Be Needed

Ignition coils and spark plugs may need inspection when the engine has hard starting, rough idle, hesitation, misfire symptoms, reduced power, poor fuel economy, or a check engine light. These symptoms can also come from fuel quality, intake leaks, wiring faults, sensor issues, or compression problems. For general repair planning, see Smart Fortwo coil and plug replacement notes.

UF808 and 91121 Reference Checks

Compare UF808, UF-808, C987, C-987, 2819060000, 22433-2428R, 224332428R, 8201154128, and 0986221079 with the original coil.
Compare spark plug reference 91121 with the plug specified for the vehicle.
Confirm that 3 ignition coils and 3 spark plugs match the listed L3 engine service quantity.
Check connector lock, coil body, mounting depth, plug reach, seat type, heat range reference, and gap requirement.

Installation and Service Notes

Install only on a cool engine, inspect the old plugs for fouling, and follow Smart-specific service information for plug gap and torque. If symptoms remain after installation, continue diagnosis by checking wiring, fuel delivery, intake leaks, sensor data, and compression. This BDFHYK set is an OE-style aftermarket replacement, not a factory-branded Smart part.

Q: Will this UF808 ignition coil and spark plug set fit my vehicle?
A: It is listed for 2016-2017 Smart Fortwo 0.9L L3 applications. Confirm engine, original coil reference, connector style, and 91121 plug reference before ordering.

Q: What is included in the package?
A: The package includes 3 ignition coils and 3 iridium spark plugs for the listed 0.9L L3 application.

Q: Which OE or interchange references should I compare?
A: Compare UF808, UF-808, C987, 2819060000, 22433-2428R, 8201154128, 0986221079, and spark plug reference 91121 with your original parts.

Q: What symptoms may point to worn ignition coils or spark plugs?
A: Common symptoms may include hard start, rough idle, hesitation, misfire symptoms, reduced power, poor fuel economy, check engine light. These symptoms should be diagnosed before replacing parts.

Q: Can this kit solve an engine misfire?
A: It may help only when the ignition coils or spark plugs are confirmed as the failed parts. Misfires can also be caused by wiring, fuel, air, sensor, or compression issues.

Q: Do I need to check spark plug gap and torque?
A: Yes. Always follow vehicle-specific service information for spark plug gap and torque. Do not force a plug into the cylinder head.

Q: Should I compare the connector and mounting style?
A: Yes. The connector shape, coil body, boot length, and mounting points should match the removed parts before installation.

Q: Should all coils and plugs be replaced at the same time?
A: That depends on the repair plan and diagnosis. Some owners service a full bank or full engine set, while others replace only the confirmed failed parts.

Q: What else can cause the same symptoms?
A: Symptoms may also come from fuel quality, intake leaks, wiring faults, sensor issues, or compression problems. Check related systems if symptoms remain after installation.

Q: Is this a factory-branded part?
A: No. This is a BDFHYK OE-style aftermarket replacement, not a factory-branded Smart 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:

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Mon–Fri 19:00–04:00 (UTC−6 / CST)

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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.