Fire a consistent, reliable spark across every cylinder with the DENSO Auto Parts Iridium Long-Life Spark Plug (MPN 3371). It drops in as a direct-fit replacement for the listed applications, including the 1997-2000 Acura EL [L4-1.6L], 2006-2010 BMW 550I [V8-4.8L], 2004-2010 Dodge Dakota [V6-3.7L], 1994-2003 Dodge Ram 2500 [V10-8.0L], and 1996-1997 Honda Accord [L4-2.2L] — see the Buyer's Guide tab for the full list of 37 applications.
A spark plug ignites the compressed air-fuel mixture in the combustion chamber to keep the engine running. If worn plugs are the cause of misfires, rough idle, hard starting, or hesitation, a fresh set addresses it.
Iridium center electrode: DENSO's patented alloy is over 90% iridium blended with a small amount of rhodium to reduce oxidation.
Platinum-chip ground electrode: a single ground electrode in a standard ground configuration.
Long-life durability: DENSO rates durability at over 110,000 miles and builds these to strict OE performance, durability, and emissions standards.
Key specs: 14.0 mm thread diameter, 19.0 mm reach, 16 mm hex, flat seat, heat range 20, 5,000-ohm resistance, and a 0.8 mm pre-gap; copper center-electrode core and nickel ground-electrode core.
The number of plugs per engine varies by application, so order a complete set for your vehicle (minimum order quantity 4). Country of origin: Japan. Manufacturer part number 3371.
This part cross-references / interchanges with the following part numbers:
14.0 mm thread diameter, 19.0 mm reach, 16 mm hex, flat seat, manufacturer heat range 20, 5,000-ohm resistance, and a 0.8 mm pre-gap.
What is the electrode design?
An iridium center-electrode tip (over 90% iridium with rhodium) on a copper core, plus a platinum-chip ground-electrode tip on a nickel core, with one ground electrode in a standard configuration.
How many plugs do I need for my vehicle?
The number per engine varies by application—some use 4, others 6, 8, or 10—so order a full set for your specific vehicle. Minimum order quantity is 4.
How long are these plugs rated to last?
DENSO rates durability at over 110,000 miles and builds them to OE performance, durability, and emissions standards. Actual life depends on engine condition and driving.
What are signs my spark plugs may need replacing?
Common signs include misfires, rough idle, hard starting, hesitation, or reduced fuel economy. Diagnose the cause first, since these symptoms can have other sources.
Spark Plug StandardPatented U-Groove technology on the ground electrode allows for a larger flame front and improved ignitability. Copper core center electrode for superior thermal conductivity...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
