Spark Plug
NGK BPR5ES
8 associated model records
The NGK BPR5ES is listed as an aftermarket spark plug in 8 model records across 2 brands. Those records reference OEM part numbers 491055S, 796112S, 98079-55846. Associated equipment records include Briggs & Stratton 450e Series, Briggs & Stratton 500e Series, Briggs & Stratton 550ex Series, Briggs & Stratton 625ex Series, Briggs & Stratton 675ex Series, and 3 more. 2 records include an assigned confidence, source type, and review date.
Amazon Buying Check
Use the Amazon listing to compare kit contents, seller details, shipping, and OEM compatibility notes before ordering.
Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.
Model Records
| Brand | Model | OEM # | Confidence | Source | Reviewed | Evidence | |
|---|---|---|---|---|---|---|---|
| Briggs & Stratton | 450e Series | 491055S | Medium | Aftermarket catalog | 2026-05-21 | 0.030 inch gap | Small Engine |
| Briggs & Stratton | 500e Series | 796112S | Medium | Aftermarket catalog | 2026-05-21 | 0.030" gap | Small Engine |
| Briggs & Stratton | 550ex Series | 796112S | Confidence not assigned | Evidence source not recorded | Not yet independently reviewed | 0.030" gap | Small Engine |
| Briggs & Stratton | 625ex Series | 796112S | Confidence not assigned | Evidence source not recorded | Not yet independently reviewed | 0.030" gap | Small Engine |
| Briggs & Stratton | 675ex Series | 796112S | Confidence not assigned | Evidence source not recorded | Not yet independently reviewed | 0.030" gap | Small Engine |
| Briggs & Stratton | 725EXi Series | 796112S | Confidence not assigned | Evidence source not recorded | Not yet independently reviewed | 0.030" gap | Small Engine |
| Briggs & Stratton | 850EXi Series | 796112S | Confidence not assigned | Evidence source not recorded | Not yet independently reviewed | 0.030" gap | Small Engine |
| Honda | GX120 | 98079-55846 | Confidence not assigned | Evidence source not recorded | Not yet independently reviewed | 0.7-0.8mm gap | Small Engine |
What this part is
NGK BPR5ES is listed here as a spark plug replacement option. Use this page as a fitment cross-reference, then confirm the removed part, model plate, and seller listing details before buying.
OEM numbers it replaces
491055S, 796112S, 98079-55846
Alternate spellings
BPR5ES is the normalized part number used on this site.
Known exclusions
- No specific exclusion is listed in the current data. Still verify serial range, production variant, and removed-part details before ordering.
Dimensions and specs
- 0.030 inch gap
- 0.030" gap
- 0.7-0.8mm gap
Symptoms that suggest replacement
- Won't start
- Hard hot restart
- Rough idle
- Fuel-fouled or carbon-heavy plug
How to verify before buying
- Confirm your equipment is one of the compatible models listed above.
- Match the OEM number, stamped part number, or physical spec against the removed part.
- Read the model-specific evidence, confidence, source, reviewed date, dimensions, notes, and exclusions before opening an Amazon listing.
Common wrong-fit mistakes
- Ordering from a broad model-family listing without checking the exact equipment model.
- Ignoring the old OEM number, stamped part number, or physical dimensions.
- Matching the plug number but missing the required gap, terminal style, or thread reach.
Related model and part pages
Amazon buying cautions
- Check that the Amazon listing includes the exact part number or verified cross-reference shown here.
- Compare kit contents, gaskets, fuel lines, bulbs, plugs, filters, and dimensions against the removed part before checkout.
- A listing title can mention the right model and still include the wrong revision, accessory, or generic substitute.