NGK 5553 Spark Plug

NGK Standard Spark Plug 5553 Overview

NGK 5553 is a standard spark plug built to OE-style specifications for a wide range of import and domestic applications. It features a copper center electrode core, nickel tip materials, a 5,000 ohm resistor, and a pre-gap of 0.044 inches for many listed vehicles.

As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s long OE supply history and focus on original-equipment-level fit and performance. The BKR6ES-11 / 5553 application coverage includes popular Toyota, Lexus, Scion, Subaru, and Chevrolet models.

• Standard spark plug for secondary ignition service
• Copper core center electrode for dependable conductivity
• Nickel center and ground electrode tip materials
• 5,000 ohm resistor for ignition system noise suppression
• Flat seat design with 14 mm thread diameter and 5/8 hex
• Pre-gapped at 0.044 inches for many applications; some vehicles require a different gap setting

Detailed Product Description

NGK part number 5553, also identified as BKR6ES-11, is a conventional spark plug used in a broad range of vehicles that call for a standard replacement plug. The design uses a copper core center electrode and nickel electrode tips to support consistent spark delivery, while the resistor helps reduce electrical interference in the ignition system. With a 0.75-inch reach, flat seat, and 14 mm thread diameter, it matches many OE-style service requirements.

Fitment coverage includes 2003-2008 Toyota 4Runner, 1996-2008 Toyota RAV4, 2005-2008 Scion tC, 2004-2008 Chevrolet Aveo, and 2001-2008 Lexus GX470 applications, along with many other Toyota, Lexus, Subaru, Suzuki, and Mercedes-Benz models. This part cross-references Monroe Shocks & Struts (e.g., 5553) for the same application.

What This Spark Plug Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent ignition output
• Misfire conditions tied to excessive plug wear or incorrect gap
• Reduced fuel economy from inefficient combustion
• Loss of throttle response during acceleration

Installation Notes and Fitment Tips

Fits 2004-2008 Chevrolet Aveo, N/A; adjust spark plug gap to 0.044 inches. Fits 2005-2008 Scion tC, N/A; adjust spark plug gap to 0.044 inches. Fits 2003-2008 Toyota 4Runner, N/A; adjust spark plug gap to 0.044 inches. Fits 1996-2008 Toyota RAV4, N/A; adjust spark plug gap to 0.044 inches. Fits 2001-2008 Lexus GX470, N/A; adjust spark plug gap to 0.044 inches.

Some listed applications require a 0.040-inch gap, including certain Mercedes-Benz twin-spark engines and select Audi, Chrysler, and Saturn models. Verify the vehicle’s OE specification before installation, and confirm the correct gap for your exact engine code and model year. The part number 5553 is also listed as BKR6ES-11.

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 vehicles. The brand’s Standard Spark Plug line is built around OE-style durability and service performance for everyday ignition maintenance.