Autolite Spark Plug (MPN: 5503)

Reliable ignition performance for various vehicles

The Autolite Spark Plug 5503 is engineered to provide exceptional ignition performance for a wide range of vehicles, including Japanese, European, and Korean models. With over a century of experience in the automotive industry, Autolite ensures that each spark plug meets or exceeds original equipment (OE) quality standards, making it a trusted choice for both aftermarket and OEM applications.

Features

• Copper-glass seal bonds the insulator and terminal post to the center electrode, ensuring full voltage at the spark gap with a gas-tight seal that is 100 percent leak-proof
• Multi-rib insulator minimizes the risk of "flash-over"
• One-piece terminal post enhances strength and durability
• Cold-formed steel shell with precision rolled threads for reliable installation
• Full copper core electrode delivers improved performance in all conditions
• Designed to provide quick starts, good fuel economy, and smooth acceleration
• Resistor included to reduce radio frequency interference (RFI) and electrode erosion

Specifications

• Manufacturer: Autolite Spark Plugs
• Manufacturer Part Number: 5503
• Resistor: Yes
• Electrode Type: OEM
• Electrode Core Material: Copper
• Electrode Tip Material: Nickel Alloy
• Insulator Type: Projected
• Thread Size (IN): 0.551 Inch
• Quantity: Single
• Reach: 3/4 Inch
• Seat Type: Gasket
• Wrench Diameter: 5/8 Inch