NGK 90483 Spark Plug

NGK Laser Iridium Spark Plug 90483

NGK 90483 is a Laser Iridium spark plug built for OE-style ignition performance in select Ford applications. It uses an iridium center electrode tip, a nickel ground electrode, and a tapered seat to support consistent combustion and reliable service intervals.

Key Features

• Laser Iridium design with an iridium center electrode tip for stable spark delivery
• Copper center electrode core for efficient heat transfer
• Nickel ground electrode with standard configuration and standard tip design
• Resistor type plug with 5,000 ohms resistance
• Pre-gapped to 0.036 in. for listed applications
• 14 mm thread diameter, 5/8 in. hex size, tapered seat
• NGK part number 90483, also identified as LTR6EI-9

Product Details

NGK’s Laser Iridium line is built around OE-level construction and application-specific tuning for modern ignition systems. This spark plug is specified for select Ford Focus, Ford EcoSport, and Ford Transit Connect models, including 2012-2018 Ford Focus, 2018-2021 Ford EcoSport, and 2019-2023 Ford Transit Connect applications listed with a 0.036 in. gap. The tapered-seat design, resistor construction, and iridium tip help maintain dependable ignition performance in vehicles that call for precise spark plug specifications. Part number 90483 is a direct reference point for shoppers searching NGK 90483 spark plug or LTR6EI-9 for Ford Focus, EcoSport, and Transit Connect service.

Common Issues This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced fuel economy from inconsistent combustion
• Loss of throttle response from degraded spark quality

Installation Notes and Tips

Verify engine application, model year, and plug gap before installation. This plug is listed with a 0.036 in. pre-gap and a tapered seat, so confirm the cylinder head specification matches the vehicle requirement. Use proper spark plug service procedures, including checking thread engagement and tightening to the manufacturer’s torque specification. For fitment searches, this part is commonly referenced for 2012-2018 Ford Focus, 2018-2021 Ford EcoSport, and 2019-2023 Ford Transit Connect.

Quality Assurance

NGK is a major OE spark plug supplier with more than 80 years of automotive experience and broad coverage across domestic and import vehicle applications. The brand’s manufacturing and distribution network supports OE-style standards for durability and consistent operation. This part cross-references Four Seasons (e.g., 90483) for the same application.