OE Quality
60-Day Returns

NGK 1094 Spark Plug
Reliable Ignition with NGK Standard Spark Plug 1094
The NGK Standard Spark Plug 1094 is engineered to provide consistent ignition performance for Jaguar XJ12 and XJS models. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.
- Resistance: 5000 ohms for stable electrical flow
- Ground Electrode Tip and Configuration: Standard design with nickel core
- Center Electrode: Copper core with nickel tip for durability
- Pre-Gap Size: 0.028 inches for optimal spark gap
- Thread Diameter: 14.00 mm with 5/8 inch hex size
- Insulator Height: 53.00 mm with tapered seat type
- Manufacturer Heat Range: 7 for balanced heat dissipation
- Electrical Terminal: Non-removable nut type
- Reach: 0.708 inches ensuring proper fitment
About the NGK Standard Spark Plug Line
The Standard Spark Plug line by NGK is designed to meet original equipment specifications for a wide range of vehicles, including classic and performance models like the Jaguar XJ12 and XJS. This line focuses on reliable ignition performance using proven materials such as copper and nickel, ensuring compatibility and durability in secondary ignition systems.
Technical Details and Performance
The NGK 1094 spark plug features a single ground electrode with a nickel core, paired with a copper core center electrode tipped with nickel. This combination supports efficient heat transfer and consistent spark generation. The 5000 ohm resistance helps reduce radio frequency interference, protecting your vehicle’s electronic systems. The tapered seat and precise thread diameter ensure a secure fit in the combustion chamber, while the 0.028 inch pre-gap size is optimized for the ignition system of Jaguar XJ12 and XJS engines.
Applications and Problem Solving
- Restores proper ignition timing and spark delivery in Jaguar XJ12 and XJS
- Helps resolve misfires and rough idling caused by worn spark plugs
- Improves fuel efficiency by ensuring complete combustion
- Reduces engine hesitation during acceleration
- Prevents ignition system interference with 5000 ohm resistance
Installation Notes and Tips
- Verify compatibility with Jaguar XJ12 or XJS before installation
- Use a torque wrench to tighten to manufacturer specifications to avoid damage
- Check and adjust the spark plug gap if necessary before installation
- Inspect the ignition system components for wear during replacement
- Apply anti-seize compound on threads if recommended by vehicle manufacturer
Quality Assurance and Warranty
NGK spark plugs, including the Standard Spark Plug 1094, are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, NGK products typically come with a limited warranty against manufacturing defects. Always consult the product documentation or vehicle manufacturer guidelines for warranty coverage and installation instructions.
| Brand | NGK |
|---|---|
| Part Number | 1094 |
| Position | Standard Spark Plug |
| 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 |
This part fits 4 vehicles. Search below:
| 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 |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.