1. Okwu mmalite
This manual provides essential information for the proper installation, operation, and maintenance of your Denso 3499 Iridium Long-Life Spark Plug. Please read this manual thoroughly before attempting any installation or service to ensure safety and optimal performance.
2. Ngwaahịa gafereview
The Denso 3499 Iridium Long-Life Spark Plug (Model SC16HR11) is engineered for superior performance and extended durability in various automotive applications. Featuring an iridium tip, it provides consistent ignition and contributes to efficient fuel combustion.
- Genuine DENSO Parts: Ensures authenticity and quality.
- Iridium Long-Life Design: Offers extended service intervals and reliable performance.
- Direct Replacement: Designed to fit specific vehicle applications as a direct replacement.
- Includes original packaging and hardware.

Image: The Denso 3499 Iridium Long-Life Spark Plug shown alongside its product packaging.

Image: A visual representation of three different types of Denso Iridium spark plugs, highlighting their distinct designs.
3. Ozi nchekwa
Na-ebute nchekwa ụzọ mgbe niile mgbe ị na-arụ ọrụ na ụgbọ ala gị. Ọdịda ịgbaso echekwabara nchekwa nwere ike bute mmerụ ahụ ma ọ bụ mebie ụgbọ ala.
- Ensure the engine is completely off and cool before beginning any work.
- Disconnect the negative terminal of the battery to prevent accidental electrical discharge.
- Yiri akụrụngwa nchedo nkeonwe dabara adaba (PPE), gụnyere ugegbe nchekwa na uwe aka.
- Use only the correct tools for spark plug removal and installation.
- Keep spark plugs and tools away from children.
4. Ntọala na nwụnye
Proper installation is crucial for the performance and longevity of your spark plugs. Consult your vehicle's service manual for specific instructions and torque specifications.
- Nkwadebe: Allow the engine to cool completely. Gather necessary tools: spark plug socket, ratchet, torque wrench, anti-seize compound, dielectric grease (optional).
- Nweta Spark Plugs: Locate the spark plugs. This may involve removing engine covers, ignition coils, or spark plug wires. Note the order of removal to ensure correct reinstallation.
- Remove Old Spark Plugs: Use a spark plug socket to carefully loosen and remove the old spark plugs. Inspect them for signs of wear or issues.
- Inspect New Spark Plugs: Visually inspect the new Denso spark plugs for any damage. The gap is typically pre-set from the factory for Iridium plugs; avoid adjusting unless specified by your vehicle manufacturer.
- Tinye mgbochi ijide: Apply a small amount of anti-seize compound to the threads of the new spark plug. Avoid getting it on the electrode or insulator.
- Install New Spark Plugs: Carefully thread the new spark plug into the cylinder head by hand to prevent cross-threading. Once finger-tight, use a torque wrench to tighten to the manufacturer's specified torque. Overtightening can damage the spark plug or cylinder head.
- Gbakọtaghachi: Reinstall ignition coils or spark plug wires, ensuring they are securely connected. Reattach any removed engine covers.
- Nyocha ikpeazụ: Double-check all connections and ensure no tools or debris are left in the engine bay.

Foto: nkọwa zuru ezu view of the spark plug's electrode and ground strap, highlighting the iridium tip.

Image: A close-up of the ceramic insulator and metal body of the spark plug, showing the Denso branding and model number.
5. Ụkpụrụ ọrụ
Spark plugs are a critical component of your vehicle's ignition system. They ignite the air-fuel mixture in the engine's combustion chambers, creating the power stroke that drives the engine. The Denso Iridium Long-Life spark plug is designed to provide a strong, consistent spark for efficient combustion and reduced emissions over an extended period.
6. Nlekọta
Denso Iridium Long-Life spark plugs are designed for extended service intervals. Refer to your vehicle manufacturer's recommended maintenance schedule for spark plug inspection and replacement. Typically, iridium plugs can last significantly longer than traditional copper plugs.
- Nyocha oge niile: During routine maintenance, visually inspect spark plugs for signs of wear, fouling, or damage.
- Ndochi: Replace spark plugs as per your vehicle's maintenance schedule or if performance issues arise.
- Proper Gapping: While Denso Iridium plugs are typically pre-gapped, always verify the correct gap for your specific vehicle application using a wire-type gap tool if necessary, though adjusting iridium tips should be avoided if possible.
7. Ịchọpụta nsogbu nkịtị
If you experience issues after spark plug installation or during their service life, consider the following common problems:
| Mgbaàmà | Ihe nwere ike ime | Ngwọta |
|---|---|---|
| Injin Misfire / siri ike Idling | Incorrectly gapped plug, fouled plug, damaged plug, loose connection. | Check plug gap, inspect for fouling/damage, ensure ignition coil/wire is securely connected. |
| Ebilatala akụ na ụba mmanụ | Worn or fouled spark plugs. | Inspect and replace spark plugs if necessary. |
| Ịmalite ihe isi ike | Weak spark due to worn plugs or ignition system issues. | Check spark plugs and ignition system components. |
| Lelee ọkụ igwe | Misfire detected by vehicle's computer. | Scan for diagnostic trouble codes (DTCs) and address the root cause, which may include spark plug issues. |
If troubleshooting steps do not resolve the issue, it is recommended to consult a qualified automotive technician.
8. Nkọwapụta
| Njirimara | Nkọwa |
|---|---|
| Ụdị | Denso |
| Nọmba nlereanya | SC16HR11 |
| Isi ihe | Platinum |
| Nha oghere | 1.1 millimeters |
| Nha eriri | 1.25mm |
| Ụdị ihe kacha elu | Ọla |
| Ibu Ibu | 1.41 ounces |
| Akụkụ ngwaahịa | 9.35 x 5.51 x 3.07 sentimita asatọ |
| Nọmba akụkụ OEM | CITROËN/PEUGEOT 1611548180, DAIHATSU 90919-01253, DAIHATSU 90919-01275, SUBARU 90919-01253, TOYOTA 90919-01253 |
| UPC | 042511034990 |
9. Akwụkwọ ikike na nkwado
For information regarding warranty coverage and technical support for your Denso spark plugs, please refer to the official Denso website or contact Denso customer service directly. Keep your purchase receipt as proof of purchase.
Denso Official Websaịtị: www.denso.com





