Ignition Coil and Spark Plug Kit compatible with Infiniti I35, QX4
This engine tune-up kit includes six high-performance ignition coils and six iridium spark plugs. The components feature high-impact housing and copper wiring for improved throttle response and heat resistance.
Key facts
- Part type
- Ignition Coil And Spark Plug Kit
- Included
- Set
- Type
- Aftermarket replacement
Compatibility matrix
Only models verified by our team are listed| Parts for | Model | This part |
|---|---|---|
| Infiniti | Infiniti QX4 | Fits |
| Infiniti I35 | Fits |
Only the models listed above have a confirmed catalog fit. If yours is absent, compatibility is unknown, not ruled out. Compare the exact model identifier and any published dimensions or connectors before ordering.
Where to find your model number
- Infiniti: Use your 17-character VIN. It's on the driver-side dashboard at the base of the windshield and on the driver's door jamb sticker. The year is in the 10th character. Also check your registration or the owner's manual.
General manufacturer guidance: exact label position can vary by model.
Ignition Coil And Spark Plug Kit specifications
- Quantity
- 6 Ignition Coils + 6 Spark Plugs
- Terminal Type
- Blade
- Terminal Quantity
- 3
- Spark Plug Material
- Iridium
- Connector Type
- Plug In
Installation guide - Replacing spark plugs / ignition coils
General guidance for this part type - always follow your device manual- Spark plug socket, extension and ratchet
- Torque wrench
- Small pick for connector clips
- One cylinder at a time keeps coil wiring in the right order.
- Oil in a plug well points to a leaking valve cover gasket.
- 1Let the engine cool. Switch the engine off and let it cool fully; plugs removed from a hot aluminum head can strip its threads.
- 2Remove one coil. Work on one cylinder at a time. Press the connector clip, unplug it, undo the coil bolt and pull the coil straight out.
- 3Swap the plug. Blow dirt out of the plug well, unscrew the old plug and check the new plug's gap against your service manual.
- 4Fit by hand first. Thread the new plug in by hand for the first turns to avoid cross threading, then tighten to the value in your service manual. Refit the coil and connector.
- 5Repeat and test. Do each cylinder in turn, then start the engine and check for smooth idle and no warning light.
This is general guidance for the part type, not a model-specific procedure. If the part does not fit without force, stop and recheck compatibility.
Maintenance check
Signs it's time to replace
- 01Engine misfires, shakes or runs rough, especially at idle or under load
- 02Check engine light is on, often with a misfire code for one cylinder
- 03Hard starting, hesitation or loss of power when accelerating
- 04Fuel economy drops noticeably
More parts for Infiniti I35
See all Infiniti I35 parts
FP-C123B012 month warranty on every part
Every part we sell is covered for 12 months from delivery. If it fails in normal use, we replace it or refund you , claim it straight from your order page.
Customer reviews
No reviews yet
Bought this part? Be the first to share how it fit and how it held up.
Questions & answers
+Which models does this ignition coil and spark plug kit fit?
Our team verified it for Infiniti QX4, Infiniti I35. The full list is in the compatibility table above.
+How do I make sure it fits my exact model?
Find the model number on your vehicle registration or VIN and compare it with the table above. Our fit guarantee covers verified models.
+What's in the box?
Pack size: Set, as listed for this part. Check the photos and specifications for the exact contents.
+Is it hard to install?
Install difficulty: Advanced · mechanical experience needed. Step by step instructions are on this page.
+How fast will it arrive?
This part is in stock in the USA: delivery within 3 to 8 business days, free shipping in the US.
+Is there a warranty?
Yes, a 12-month warranty is included, and you can extend it at checkout. Returns are accepted within 30 days.