
NGK Iridium Spark Plug 6645 - 4 Pack for Colt VI 1.5L 16V | Fits 2004+
In stock, ready to ship
In stock now — leaves the warehouse in 1–2 business days
Fitment
Listed for Colt · 2004 onwards
Check this part against your vehicle
Options come from the vehicles named on the parts we stock.
Product details
Upgrade Your Engine's Performance with NGK Iridium Spark Plugs!
The NGK 6645 Iridium Spark Plug (ILZFR6C K) is engineered for high-performance vehicles like the Colt VI 1.5L 16V (2004 and later). This package includes 4 plugs to ensure optimal ignition and reliability in your vehicle.
Key Benefits:
- Enhanced combustion efficiency for improved fuel economy.
- Longer lifespan due to iridium center electrode.
- Reduced fouling and misfiring, ideal for both everyday driving and high-performance applications.
Technical Specifications:
Socket Size: 16 mm
Thread Size: M14 x 1.25
Thread Length: 1.05 in (26.5 mm)
Spark Plug Type: Iridium Center Electrode
Electrodes: 1 Ground Electrode
Resistance: Non-Resistance Design, 5 kOhm
With Flat Seat for Gasket
Ignition Position: 0.2 in (5.0 mm)
Connection Type: Fixed SAE
How to Use:
For installation, ensure your engine is cool, and use the correct socket size for removal and installation. Torque specifications should be followed to avoid damage and ensure the best performance.
Checking fitment
Match the part number above against the part you are replacing, or check the models and engines named on this page against your vehicle. If the number matches, the part matches.
Shipping
Orders leave the warehouse in 1–2 business days. Free shipping on every US order.
Returns & warranty
30 days to return an unused part in its original packaging. Manufacturer warranty of 12 months against defects.









