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Champion 7972 Spark Plug
| Brand | Champion 7972 |
|---|---|
| Center Electrode Diameter (Inch) | 0.078 |
| Center Electrode Tip Material | Platinum |
| Classification | Champion Premium Small Engine |
| Electrical Terminal Type | Non-Removable Nut |
| Gap Style | J Gap |
| Ground Electrode Core Material | Platinum |
| Ground Electrode Material | Platinum Pad Surface |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | J Gap |
| Hex Size | 0.813 |
| Hex Size | 20.650 |
| Hex Type | Hex |
| Installed Height (Inch) | 1.99 |
| Insulator Height | 0.03 |
| Insulator Projection (Inch) | 0.03 |
| Manufacturer Heat Range | 8 |
| Plug Type | RA8PHP |
| Pre-Gap Size | 0.040 |
| Pre-Gap Size | 1.02 |
| Reach | 0.75 |
| Resistor Type | Yes |
| Seat Type | Flat |
| Taper Diameter (Inch) | 0.2 |
| Thread Diameter | 0.472 |
| Thread Diameter | 12.000 |
| Product line | Double Platinum Power |
| Fits | Harley Davidson, Indian, BMW, Honda, Victory, Ducati, Big Dog, Ski-Doo, American IronHorse, Bimota, Arctic Cat, Buell, and Excelsior-Henderson · 5 vehicles |
Double Platinum Power. Delivers stronger performance with platinum fine-wire electrodes for sharper spark focus.
Platinum construction. Platinum center and ground electrodes help deliver maximum life.
J-gap design. Promotes consistent ignition with a pre-gapped spark plug.
Cross-references 6R12PP, 2873084 and IJR7A9 for the same application. See all 4.
Champion Double Platinum Power Spark Plug 7972
Champion Double Platinum Power spark plug 7972 is built for precise ignition performance in select BMW applications. It uses platinum on both the center and ground electrodes, along with a fine-wire center electrode and Heat-Active alloy for a focused spark and long service life.
This plug is a direct-fit option for 1988-1991 BMW M3 and 1988 BMW M5 applications listed below. If you are searching for a Champion 7972 spark plug for BMW M3 or BMW M5 ignition service, this part matches the specified plug type and gap requirements.
Key Features
- Champion Double Platinum Power line for secondary ignition service
- Platinum fine-wire center electrode for sharper spark focus
- Platinum pad ground electrode for extended electrode durability
- Heat-Active alloy construction for stable performance
- Pre-gapped at 0.040 in (1.02 mm)
- J-gap ground electrode design
- Resistor plug with non-removable nut terminal
- Flat seat, 12 mm thread diameter, 0.75 in reach
- Champion Premium Small Engine classification
Product Details
Champion 7972 is a platinum spark plug with a 0.078 in center electrode diameter, 0.813 in hex size, and RA8PHP plug type. The double-platinum design helps maintain consistent spark characteristics over time, while the resistor construction supports ignition system noise control. For BMW M3 and BMW M5 owners servicing factory-specified ignition components, this plug follows the listed heat range and fitment details.
This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
Vehicle Fitment
- Fits 1988-1991 BMW M3, N/A. Notes: Gap 0.028 in; Plug Type Number RA8PHP; Double Platinum Power.
- Fits 1988 BMW M5, N/A. Notes: Gap 0.028 in; Plug Type Number RA8PHP; Double Platinum Power.
Common Service Issues Addressed
- Misfire caused by worn or eroded spark plug electrodes
- Hard starting from weak or inconsistent spark output
- Rough idle related to aged ignition components
- Reduced throttle response from degraded plug performance
- Maintenance replacement for specified BMW ignition service intervals
Installation Notes and Tips
Verify the plug type number RA8PHP and confirm the required gap before installation. Use the listed seat type, thread diameter, reach, and hex size to match the engine specification, and inspect the ignition system for wear before installing new plugs. For BMW M3 and BMW M5 applications, follow the vehicle service manual for torque and gap verification.
Quality Assurance
Champion’s Double Platinum Power line uses platinum electrode materials and Heat-Active alloy construction to support durable ignition performance in the specified applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1991 | BMW | M3 | 2.3L | L4 | N/A | Gap 0.028 (in); Plug Type Number RA8PHP; Double Platinum Power |
| 1990 | BMW | M3 | 2.3L | L4 | N/A | Gap 0.028 (in); Plug Type Number RA8PHP; Double Platinum Power |
| 1989 | BMW | M3 | 2.3L | L4 | N/A | Gap 0.028 (in); Plug Type Number RA8PHP; Double Platinum Power |
| 1988 | BMW | M3 | 2.3L | L4 | N/A | Gap 0.028 (in); Plug Type Number RA8PHP; Double Platinum Power |
| 1988 | BMW | M5 | 3.5L | L6 | N/A | Gap 0.028 (in); Plug Type Number RA8PHP; Double Platinum Power |
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