Part #: 6721

Bosch 6721 Spark Plug

OE Fine Wire Platinum
114 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
OE Fine Wire Platinum
Fitment: Dodge, Jeep, and Nissan, Dakota, Durango, Ram 1500, Ram 1500 Van, Ram 2500 Van, Ram 3500 Van, Ram 2500, Ram 3500, B1500, B2500, B3500, Grand Cherokee, Pickup, Axxess, D21, Stanza, and 240SX
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Overview of Bosch OE Fine Wire Platinum Spark Plug 6721

The Bosch OE Fine Wire Platinum Spark Plug 6721 is engineered for reliable ignition performance in select Dodge, Jeep, and Nissan vehicles. Designed with precision materials and specifications, this spark plug supports efficient combustion and consistent engine operation.

  • Platinum center electrode tip for enhanced durability
  • Tapered ground electrode tip design for improved spark efficiency
  • 6000 ohm resistance resistor to reduce electrical noise
  • Flat seat type with 14mm thread diameter and 19mm reach
  • Compatible with 4-cycle engines in Dodge Ram, Jeep Grand Cherokee, and Nissan 240SX models

Detailed Features and Specifications

This Bosch spark plug features a platinum center electrode tip combined with a nickel-yttrium ground electrode tip, providing a balance of wear resistance and conductivity. The ground electrode has a tapered tip design and a standard single electrode configuration, optimized for stable spark generation. The insulator is made from ceramic with a projected type design, supporting reliable insulation and heat dissipation. The pre-gap size is set at 1.1 mm, suitable for the ignition requirements of compatible vehicles.

The spark plug includes a 6000 ohm resistor to minimize radio frequency interference, ensuring smooth operation of onboard electronics. With a manufacturer heat range of 8, this part is designed to operate efficiently under typical engine temperatures for the specified applications. The hex size is 16 mm, facilitating installation with standard tools.

About the OE Fine Wire Platinum Product Line

The Bosch OE Fine Wire Platinum line focuses on delivering spark plugs with fine wire electrodes made from platinum, which enhances electrode longevity and ignition reliability. This product line is engineered to meet or exceed original equipment specifications, making it suitable for drivers seeking OEM-level performance and durability in their ignition components.

Compatible Vehicles and Applications

  • Dodge Ram 1500, Ram 2500, Ram 3500, and their van variants
  • Jeep Grand Cherokee and Durango models
  • Nissan 240SX, B1500, B2500, B3500, D21, and Pickup trucks

Common Issues Addressed by Bosch Spark Plug 6721

  • Engine misfires and rough idling
  • Reduced fuel efficiency due to incomplete combustion
  • Difficulty starting the engine in cold conditions
  • Increased emissions from inefficient ignition
  • Interference with vehicle electronics caused by spark plug noise

Installation Notes and Tips

Ensure the spark plug gap is set to the specified 1.1 mm before installation. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage to the threads or seat. The 16 mm hex size allows for compatibility with common spark plug sockets. Inspect the spark plug hole for debris before installation to prevent contamination. Replacement intervals should follow vehicle manufacturer guidelines for optimal performance.

Quality Assurance and Warranty

Bosch OE Fine Wire Platinum spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. This spark plug includes a built-in resistor to reduce electrical interference, supporting vehicle electronics. Warranty coverage details should be confirmed with the original equipment manufacturer or Bosch authorized distributors.

BrandBosch
Part Number6721
PositionOE Fine Wire Platinum
Cases Per Pallet (ORLY)85
Center Electrode Core MaterialNickel-Yttrium and Copper
Center Electrode Tip MaterialPlatinum
Ground ConfigurationStandard
Ground Electrode Quantity1
Ground Electrode Tip DesignTapered
Ground Electrode Tip MaterialNickel-Yttrium
Hex Size16
Insulator MaterialCeramic
Insulator TypeProjected
Manufacturer Heat Range8
Outdoor Power Equipment ApplicationNo
Package ContentsSpark Plug
Pre-Gap Size1.1
Product Length3.125984 in
Product Width0.748031 in
Reach19
Resistance6000
ResistorYes
Seat TypeFlat
Short StyleNo
Spark Plug Type4-Cycle
Thread Diameter14
Unit(s) per Car Qty (ORLY)8

This part fits 114 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2003DodgeDakota5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeDurango5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 15005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 1500 Van3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 1500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 1500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 2500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 2500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 3500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2003DodgeRam 3500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeDakota5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeDurango5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 15005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 1500 Van3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 1500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 1500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 25005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 2500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 2500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 35005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 3500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2002DodgeRam 3500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeDakota5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeDurango5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 15003.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 15005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 15005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 1500 Van3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 1500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 1500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 25005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 2500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 2500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 2500 Van3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 35005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 3500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2001DodgeRam 3500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeDakota5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeDurango5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeDurango5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 15003.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 15005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 15005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 1500 Van3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 1500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 1500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 25005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 2500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 2500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 35005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 3500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
2000DodgeRam 3500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeDakota5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeDakota5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeDurango5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeDurango3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeDurango5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 15005.2LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 15005.9LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 15003.9LV6N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 1500 Van3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 1500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 1500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 25005.9LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 2500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 2500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 35005.9LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 3500 Van5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1999DodgeRam 3500 Van5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB15005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB15003.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB15005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB25005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB25005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB35005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeB35005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeDakota5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeDakota5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeDurango5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeDurango3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeDurango5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeRam 15005.2LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeRam 15003.9LV6N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeRam 15005.9LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeRam 25005.9LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeRam 35005.9LV8N/ADo Not Gap, Gap is Preset; with Long Nose; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998DodgeRam 35005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998JeepGrand Cherokee5.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1998JeepGrand Cherokee5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB15005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB15003.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB25005.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB25003.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB25005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB35005.2LV8GASN/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeB35005.9LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeDakota5.2LV8N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997DodgeDakota3.9LV6N/ADo Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1997NissanPickup2.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1996NissanPickup2.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1995NissanPickup2.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1994NissanD212.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1993NissanD212.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1992NissanD212.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1991NissanD212.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1990Nissan240SX2.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1990NissanD212.4LL4N/ADo Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Platinum
1989Nissan240SX2.4LL4N/ADo Not Gap, Gap is Preset; OE Fine Wire Platinum

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.