Bosch 9624 Spark Plug

Bosch OE Fine Wire Double Iridium Spark Plug 9624

Bosch 9624 is an OE Fine Wire Double Iridium spark plug built for direct replacement in a wide range of Hyundai, Kia, Mitsubishi, and Genesis applications. It uses an ultra-fine wire center electrode and a laser-welded tapered ground electrode to promote consistent ignitability, stable combustion, and long service life.

The Bosch OE Fine Wire Double Iridium line focuses on OE-style performance with durable electrode materials and a preset gap. For vehicles such as the Hyundai Accent, Kia Rio, and Kia Soul, this spark plug is specified as a do-not-gap design, which helps preserve the factory ignition setup.

Key Features

• Double iridium design for performance and durability
• Ultra-fine wire center electrode for efficient spark initiation
• Laser-welded tapered ground electrode for consistent firing
• Preset gap; do not gap on listed applications
• Resistor spark plug with ceramic insulator
• OE-style replacement for 4-cycle ignition systems
• Bosch part number 9624 for catalog and service reference

Product Details

Bosch OE Fine Wire Double Iridium spark plug 9624 is engineered around iridium-alloy electrode construction, with a nickel-y yttrium and copper core and a platinum-iridium plus nickel-yttrium ground tip material. The flat seat, projected insulator, 12 mm thread diameter, 26.5 mm reach, and 16 mm hex size align with OE service requirements on listed vehicles. This plug is a direct service part for applications including 2012-2021 Hyundai Accent, 2012-2020 Kia Rio, 2012-2019 Kia Soul, 2011-2015 Kia Optima, and 2011-2014 Hyundai Sonata. Bosch 9624 is also listed for select Mitsubishi Outlander, Hyundai Santa Fe Sport, and Genesis models.

What This Spark Plug Helps Address

• Hard starting caused by worn ignition electrodes
• Misfire conditions from degraded spark delivery
• Rough idle related to inconsistent combustion
• Reduced throttle response from weak ignition performance
• Service replacement needs on OE iridium-equipped engines

Installation Notes

Verify engine application by year, make, and model before installation. For listed Hyundai and Kia applications, do not gap the plug; the gap is preset from the factory. Use the correct torque procedure for the engine and inspect coil boots, ignition coils, and plug wells during service. Bosch 9624 should be installed only in vehicles shown in the fitment data, including Fits 2012-2021 Hyundai Accent, Fits 2012-2020 Kia Rio, and Fits 2012-2019 Kia Soul.

Quality Assurance

Bosch OE Fine Wire Double Iridium plugs are built with laser-welded electrode construction and OE-focused materials to support consistent ignition performance and long service life in the listed Hyundai Accent, Kia Rio, Kia Soul, and related applications. This part cross-references Bosch OE Fine Wire Double Iridium service references for the same application.