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NGK 7803 Spark Plug
| Brand | NGK 7803 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Taper cut |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | .036 |
| Ground Electrode Quantity | 1 |
| Hex Size | 18 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 7 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 12.00 |
| Part Number | Dpr7eix-9 |
| Stock Number | 7803 |
| Fits | — |
Iridium IX design. Fine iridium tip promotes consistent spark and long service life.
Copper core. Helps transfer heat efficiently for stable ignition performance.
OE supplier heritage. Backed by NGK’s long-standing original equipment manufacturing experience.
Cross-references AMS Automotive 4082, DENSO Auto Parts 5375 and DENSO Auto Parts 5394 for the same application. See all 15.
NGK Iridium IX Spark Plug 7803
NGK Iridium IX Spark Plug 7803 is built for drivers who want a precise OE-style ignition component with iridium center electrode technology and a copper core for stable performance. This NGK spark plug is a direct replacement style part for applications that call for DPR7EIX-9 specifications, including select Honda Civic and Toyota Corolla fitments where the correct heat range and reach matter.
Key Features
- NGK Iridium IX spark plug, part number 7803
- Iridium center electrode tip material for consistent spark delivery
- Copper core center electrode for efficient heat transfer
- 5000 ohm resistance for ignition system compatibility
- Manufacturer heat range 7
- 12 mm thread diameter, .75 reach, flat seat
- Pre-gapped at .036
- Single nickel ground electrode with taper cut tip design
- Removable nut terminal type
Product Details
The NGK Iridium IX Spark Plug line focuses on precise ignition performance using a fine iridium tip and OE-oriented construction. Part 7803, also identified as DPR7EIX-9, uses a copper core center electrode, nickel ground electrode core, and a standard ground configuration to support reliable combustion in properly matched applications. With its 18 mm hex size, flat seat, and .75 reach, this spark plug is specified for engines that require these exact dimensions. It is a practical choice for maintenance on vehicles such as Honda Civic and Toyota Corolla applications where correct plug specification is critical.
This part cross-references DENSO Auto Parts 5375 and 5394 for the same application.
Common Issues It Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent ignition output
- Misfire conditions tied to degraded plug electrodes
- Reduced throttle response from weak spark delivery
- Maintenance replacement for plugs with incorrect heat range or reach
Installation Notes and Tips
Verify the engine calls for DPR7EIX-9 specifications before installation. Confirm thread diameter, reach, seat type, and pre-gap against the service information for the vehicle. Use the correct torque procedure and inspect ignition coils, boots, and wires during service to avoid repeat misfire concerns. For fitment-based searches, this spark plug is used in select Honda Civic and Toyota Corolla applications where the listed dimensions match the engine requirement.
Quality Assurance
NGK is a long-established OE supplier and spark plug manufacturer with broad coverage across domestic and import vehicles, motorcycles, marine engines, and small engines. Its North American manufacturing and distribution network supports consistent product availability and OE-level standards for ignition service parts.
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