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NGK 97181 Spark Plug
| Brand | NGK 97181 |
|---|---|
| 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 | 0.032 |
| Ground Electrode Quantity | 1 |
| Hex Size | 5/8 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | 0.75 |
| Thread Diameter | 12.00 |
| Part Number | Dcpr8eix solid |
| Stock Number | 97637 |
| Product line | Iridium IX Spark Plug |
| Fits | BMW and Lamborghini · 12 vehicles |
Iridium IX design. Iridium center electrode helps deliver consistent ignition performance.
Taper-cut ground tip. Promotes a focused spark for efficient combustion.
Copper core. Improves heat transfer for stable plug operation.
Cross-references NGK 97181 for the same application. See all 1.
NGK Iridium IX Spark Plug 97181 Overview
The NGK Iridium IX Spark Plug 97181 is a direct-fit ignition component built around an iridium center electrode, copper core, and a 5,000 ohm resistor for stable secondary ignition performance. It is specified for select BMW and Lamborghini applications, including BMW Z4, BMW M3, BMW Z3, and the 1990 Lamborghini Diablo.
The NGK Iridium IX Spark Plug line focuses on precise ignition characteristics and consistent electrode design. For buyers searching for an NGK 97181 spark plug for BMW M3 or an NGK 97181 spark plug for BMW Z4, this part number identifies the Iridium IX configuration with the listed heat range and gap requirements.
Key Features
- Iridium tip center electrode for fine-wire ignition performance
- Copper core center electrode for efficient heat transfer
- Nickel ground electrode with taper cut tip design
- 5,000 ohm resistor for ignition noise suppression
- Flat seat design with 12 mm thread diameter and 5/8 hex size
- Pre-gapped at 0.032 inches; verify against vehicle-specific requirements
- Manufacturer heat range 8
- NGK part number 97181, also identified as DCPR8EIX SOLID
Product Details
This NGK Iridium IX Spark Plug 97181 uses an iridium center electrode tip paired with a nickel ground electrode to support consistent spark delivery in the listed applications. The flat seat, 0.75 reach, and removable nut terminal match the published specifications for compatible BMW and Lamborghini engines. For BMW Z4 and BMW M3 applications, the notes specify adjusting the spark plug gap to 0.032 inches; the 1990 Lamborghini Diablo listing specifies a 0.028-inch gap.
This part cross-references NGK 97181 for the same application.
What It Helps Address
- Misfires caused by worn or eroded spark plug electrodes
- Hard starting related to weak ignition output
- Rough idle from inconsistent spark delivery
- Reduced throttle response from degraded plug performance
- Service replacement needs on BMW M3, BMW Z4, BMW Z3, and Lamborghini Diablo applications
Installation Notes
- Confirm engine application before installation using the vehicle fitment list.
- Set the spark plug gap to the vehicle-specific specification noted in the fitment data.
- Use the correct 5/8-inch spark plug socket for installation and removal.
- Inspect coil boots, plug wires, and threads before installing the new plug.
- Follow the manufacturer’s torque specification for the engine being serviced.
Quality Assurance
NGK is a recognized ignition component manufacturer, and this Iridium IX spark plug is built to the published specifications for thread size, reach, seat type, heat range, and electrode materials. Verify part number 97181 against the vehicle application before ordering.
Compatible Vehicles
- Fits 2006-2008 BMW Z4, N/A. Notes: Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug
- Fits 2001-2006 BMW M3, N/A. Notes: Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug
- Fits 2001-2002 BMW Z3, N/A. Notes: Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug
- Fits 1990 Lamborghini Diablo, N/A. Notes: Set spark plug gap to 0.028 inches.; Iridium IX Spark Plug
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | BMW | Z4 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2007 | BMW | Z4 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2006 | BMW | M3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2006 | BMW | Z4 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2005 | BMW | M3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2004 | BMW | M3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2003 | BMW | M3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2002 | BMW | M3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2002 | BMW | Z3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2001 | BMW | M3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 2001 | BMW | Z3 | 3.2L | L6 | N/A | Adjust spark plug gap to 0.032 inches.; Iridium IX Spark Plug |
| 1990 | Lamborghini | Diablo | 5.7L | V12 | N/A | Set spark plug gap to 0.028 inches.; Iridium IX Spark Plug |
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