NGK 6853 Spark Plug

NGK Iridium IX Spark Plug 6853 Overview

The NGK Iridium IX Spark Plug 6853 is built for precise ignition performance in a wide range of domestic and import applications. As part of the NGK Iridium IX Spark Plug line, this plug uses an iridium center electrode, a copper core, and a tapered ground electrode tip to support consistent spark delivery and stable combustion.

For drivers searching for an NGK BPR9EIX spark plug, this part number 6853 is a direct reference for the same application. It is a practical choice for ignition service on vehicles such as Honda Civic and Mazda applications where the correct heat range and thread specifications matter.

Key Features

• Iridium center electrode tip material for focused spark performance
• Copper core center electrode for efficient heat transfer
• Taper cut ground electrode tip design for cleaner spark exposure
• Standard ground configuration with one ground electrode
• 5000 ohm resistance for ignition system compatibility
• Pre-gapped to .032 for service-ready installation
• 14.00 mm thread diameter, .75 reach, and flat seat design
• 13/16 hex size with removable nut terminal
• Manufacturer heat range 9 for higher-temperature operating needs

Product Details

NGK builds this spark plug with the durability and OE-focused engineering expected from a major original equipment supplier. The iridium tip helps maintain a consistent firing point, while the nickel ground electrode and tapered cut profile support reliable spark exposure under demanding conditions. The BPR9EIX / 6853 specification is suited to applications that require a colder heat range and precise plug dimensions.

This part cross-references AMS Automotive 6853 for the same application. When replacing worn plugs in Honda Civic or Mazda engines, matching the thread diameter, reach, seat type, and heat range is essential for proper operation and long-term ignition stability.

Common Issues This Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions related to degraded electrode wear
• Reduced throttle response from weak ignition performance
• Maintenance intervals where the original plug specification is required

Installation Notes

Verify the engine calls for NGK BPR9EIX / 6853 before installation. Confirm thread diameter, reach, seat type, and heat range against the original plug specification, and check the gap if your application requires a different setting than the pre-gap size of .032. Use proper torque procedures and inspect ignition components for wear during service.

Compatible With select Honda Civic and Mazda applications where the listed plug dimensions and heat range match the OE requirement. Fits should be confirmed by engine code and original spark plug specification before purchase.

Quality Assurance

NGK is a long-established OE supplier with broad coverage across automotive, motorcycle, marine, and small engine ignition applications. The brand’s manufacturing and distribution network supports consistent product standards for replacement spark plugs such as the NGK Iridium IX Spark Plug 6853.