Denso 3529 Spark Plug

Denso Iridium Long Life Spark Plug 3529

Denso 3529 is an Iridium Long Life spark plug built for OE-level performance, durability, and emissions control. It uses an iridium center electrode tip, platinum needle ground tip design, and a 1.1 mm pre-gap for consistent ignition in modern engines.

The Denso Spark Plug - Iridium Long Life (SIP) line focuses on long service life and stable spark delivery for late-model import applications. This plug is a direct OE-style choice for drivers maintaining factory ignition performance in vehicles such as the Nissan Sentra, Nissan Altima, Nissan Rogue, and Mitsubishi Outlander.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration
• 5000 ohm resistor for ignition noise suppression
• Copper core center electrode and nickel ground electrode core
• Flat seat design with 26.5 mm reach
• Manufacturer heat range 22
• OE-style spark plug for late-model Nissan and Mitsubishi applications

Product Details

Denso 3529 is engineered to meet strict OE performance, durability, and emissions standards. The iridium tip supports reliable ignition under demanding combustion conditions, while the platinum needle ground design helps maintain consistent firing characteristics over extended service intervals. With a 14.3 mm hex size and 1.1 mm pre-gap, this spark plug is specified for modern engines that require accurate ignition geometry. It is a direct replacement for OE part numbers including 22401-6CA1C and 22401-6LB1C, and it cross-references Denso DXE22H11C for the same application.

Vehicle Fitment

• Fits 2022-2023 Mitsubishi Outlander, N/A
• Fits 2020-2023 Nissan Sentra, N/A
• Fits 2019-2021 Nissan Altima, N/A
• Fits 2021 Nissan Rogue, N/A

Common Issues This Part Can Address

• Misfires caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Rough idle related to degraded ignition performance
• Reduced fuel economy from inefficient combustion
• Emissions concerns tied to aging spark plugs

Installation Notes

Verify the OE part number, thread reach, seat type, and pre-gap before installation. Use the correct torque specification for the cylinder head and inspect ignition coils and boots for wear at the same time. For best results, install on the listed Nissan Sentra, Nissan Altima, Nissan Rogue, or Mitsubishi Outlander applications only when the engine code and OE reference match the vehicle requirements.

Quality Assurance

Denso manufactures this spark plug to OE performance, durability, and emissions standards, making it a technical replacement for factory-style ignition service on the listed applications.