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NGK 1094 Spark Plug
| Brand | NGK 1094 |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Electrical Terminal Type | Non-Removable Nut |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Standard |
| Hex Size | 5/8 |
| Insulator Height | 53.00 |
| Manufacturer Heat Range | 7 |
| Part Number | BR7EFS |
| Pre-Gap Size | .028 |
| Reach | .708 |
| Resistance | 5000 |
| Seat Type | Tapered |
| Stock Number | 1094 |
| Thread Diameter | 14.00 |
| Product line | Standard Spark Plug |
| Fits | Jaguar · 4 vehicles |
OE supplier heritage. Built by NGK, a long-time original equipment spark plug manufacturer.
Copper core design. Helps promote reliable ignition performance and durability.
Standard spark plug. A direct-fit replacement for routine ignition service.
Cross-references FEL-PRO 1094, Karlyn 483 and 1765242 for the same application. See all 5.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
NGK BR7EFS Spark Plug for OE-Style Ignition Service
NGK part number 1094 is a standard spark plug built for consistent ignition performance in select Jaguar applications. It uses a copper center electrode, nickel tip materials, and a tapered seat to match OE-style service requirements for 1989-1990 Jaguar XJ12 and XJS models.
Key Features
- NGK Standard Spark Plug line for routine ignition service
- Part number 1094, also identified as BR7EFS
- Copper center electrode core for stable conductivity
- Nickel center and ground electrode tip materials
- Standard ground electrode design with one ground electrode
- 5000 ohm resistance for ignition system noise control
- Pre-gapped at .028 inch
- Tapered seat with 14.00 mm thread diameter and 5/8 hex size
- Manufacturer heat range 7 for specified engine applications
Product Details
The NGK Standard Spark Plug line is built around OE-focused construction and broad application coverage, backed by NGK’s long history as a major original equipment supplier in North America. This spark plug uses a copper core center electrode for dependable heat transfer, nickel electrode materials for everyday durability, and a tapered seat design that supports proper sealing in the specified Jaguar cylinder head applications. For buyers searching for an OE replacement spark plug for 1989-1990 Jaguar XJ12 or 1989-1990 Jaguar XJS, NGK 1094 provides the correct service-style configuration.
This part cross-references FEL-PRO 1094 for the same application.
Common Issues This Part Addresses
- Hard starting caused by worn spark plug electrodes
- Rough idle from inconsistent spark delivery
- Misfire conditions related to aged ignition components
- Reduced throttle response from degraded plug performance
- Ignition noise concerns in service replacement applications
Installation Notes and Tips
Verify the specified application before installation and confirm the tapered seat, 14.00 mm thread diameter, 5/8 hex size, and heat range match the engine requirements. The plug is pre-gapped at .028 inch, but final gap should always be checked against the vehicle service specification before use. Use proper torque procedures for tapered-seat spark plugs to help ensure correct sealing and consistent ignition performance.
Quality Assurance
NGK is a long-established OE supplier and manufacturer with North American and global production and distribution support. Part number 1094 is built to meet original-equipment-style standards for durability and operational consistency in the listed Jaguar applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1990 | Jaguar | XJ12 | 5.3L | V12 | N/A | OE equivalent spark plug with a 0.035" gap; Standard Spark Plug |
| 1990 | Jaguar | XJS | 5.3L | V12 | N/A | OE equivalent spark plug with a 0.035" gap; Standard Spark Plug |
| 1989 | Jaguar | XJ12 | 5.3L | V12 | N/A | OE equivalent spark plug with a 0.035" gap; Standard Spark Plug |
| 1989 | Jaguar | XJS | 5.3L | V12 | N/A | OE equivalent spark plug with a 0.035" gap; Standard Spark Plug |
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