Denso 3235 Spark Plug

Denso 3235 U-Groove Spark Plug Overview

The Denso 3235 is a conventional spark plug built for secondary ignition service in select Dodge and Jeep applications. Its U-Groove electrode design is engineered to improve ignitability, helping support more efficient combustion and consistent engine operation.

As part of Denso’s U-Groove Conventional line, this plug combines a nickel ground electrode, nickel tip, and copper center electrode core for a straightforward OE-style ignition solution. It is a direct-fit choice for drivers searching for a Denso 3235 spark plug for Dodge Dakota, Dodge Durango, Dodge Ram 1500, and Jeep Grand Cherokee applications.

Key Features

• U-Groove ground electrode design for improved spark exposure
• Conventional spark plug construction for secondary ignition systems
• Nickel ground electrode tip and nickel center electrode tip
• Copper center electrode core for stable conductivity
• 5000 ohm resistance
• Pre-gapped at 0.8 mm
• 14 mm thread diameter, 19.00 mm reach, flat seat
• 16.0 mm hex size and manufacturer heat range 16

Product Details

Denso’s U-Groove Conventional line focuses on reliable ignition performance with a design that exposes more of the spark to the air-fuel mixture. The Denso 3235 uses a standard ground configuration with one ground electrode and a nickel-based electrode setup, making it a practical replacement spark plug for older truck and SUV engines that call for this specification. Cross-reference part numbers include American Motors J3239652 and DENSO Auto Parts QJ16AR-U for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to degraded plug electrodes
• Reduced throttle response from weak spark delivery
• Poor combustion efficiency in aging ignition systems

Installation Notes and Fitment

Compatible With 1997-2003 Dodge Dakota, 1998-2003 Dodge Durango, 1997-2003 Dodge Ram 1500, 1999-2003 Dodge Ram 1500 Van, 1999-2003 Dodge Ram 2500 Van, 1999-2003 Dodge Ram 3500 Van, 2000-2002 Dodge Ram 2500, 2000-2002 Dodge Ram 3500, 1997-1998 Dodge B1500, 1997-1998 Dodge B3500, 1997-1998 Jeep Grand Cherokee, and 1997 Dodge B2500.

Verify thread diameter, reach, seat type, and heat range against the original specification before installation. Check plug gap during service even though the pre-gap size is listed at 0.8 mm, and follow the vehicle manufacturer’s ignition service procedure for torque and inspection intervals.

Quality Assurance

This Denso spark plug is built to the specifications listed above for direct replacement use in the confirmed applications. The U-Groove Conventional design is intended to provide dependable ignitability and consistent engine efficiency in the vehicles shown.