NGK Iridium IX Spark Plug - BPR5EIX
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The NGK BPR5EIX is an Iridium IX spark plug designed as a premium replacement for engines that specify the BPR5EIX / NGK 95525 plug profile. It uses a fine-wire iridium center electrode for strong ignition performance, improved ignitability, and better resistance to fouling compared with a standard nickel plug in compatible applications.
This plug should be installed only where the engine, vehicle, or equipment manufacturer specifically lists NGK BPR5EIX, NGK 95525, or an approved equivalent.
Key Features
- Genuine NGK Iridium IX spark plug.
- NGK part number: BPR5EIX.
- NGK stock number: 95525.
- Premium fine-wire iridium center electrode design.
- Projected insulator nose.
- Resistor-style spark plug.
- Solid terminal configuration.
- Thread diameter: 14 mm.
- Thread reach: 19 mm / 3/4 in.
- Hex size: 13/16 in. / 21 mm.
- Heat range: 5.
- Factory preset gap: 0.032 in. / 0.8 mm.
- Common upgrade reference for applications that originally specify the standard NGK BPR5ES profile, when confirmed by the engine application chart.
Application Compatibility
Common application context includes select classic automotive, powersports, ATV, utility, and small-engine applications where the factory chart calls for NGK BPR5EIX / 95525, including:
- Select classic automotive engines where specified
- Select powersports and ATV engines where specified
- Select utility vehicle applications where specified
- Select small-engine applications where the manufacturer calls for the BPR5EIX plug profile
- Applications that accept BPR5ES-style plug geometry only when the manufacturer confirms BPR5EIX as an approved iridium replacement
Use this spark plug only where the equipment manufacturer's plug chart specifically calls for BPR5EIX, 95525, or an approved equivalent.
Fitment Notice
Confirm fitment by exact year, make, model, engine, service manual, and factory spark plug chart before ordering. Spark plugs with the same thread diameter can still differ in reach, heat range, terminal style, projected-tip design, resistor specification, electrode material, and required gap. Installing the wrong plug can cause hard starting, misfire, poor idle, overheating, thread damage, piston contact, or ignition-system problems.
When This Part Needs Replacement
Replace spark plugs during scheduled tune-up service or when the plug is fouled, worn, oil-contaminated, fuel-soaked, corroded, cracked, damaged, or causing hard starting, hesitation, rough idle, misfire, poor throttle response, or reduced power. Engines that idle frequently, operate under heavy load, or run in damp environments should have plugs inspected more regularly.
Installation Notes
Check the plug number and gap against the equipment manufacturer's service chart before installation. If gap adjustment is required, use the correct gapping tool and avoid prying directly against the fine iridium center electrode. Install into clean, undamaged cylinder head threads and tighten to the manufacturer's torque specification. Avoid adding anti-seize unless the engine or plug manufacturer specifically calls for it, as lubricant can change the clamping load and increase the risk of over-tightening.
Alternate/Superseded Part Numbers
- NGK BPR5EIX — spark plug part number
- NGK 95525 — NGK stock number
- BPR5EIX 95525 — common catalog reference
- BPR5ES — standard nickel plug profile reference only; verify approved upgrade compatibility before substitution
Parts Desk Insight
The BPR5EIX is not the same profile as long-reach marine plugs such as LFR-series plugs. It uses a shorter 19 mm / 3/4 in. reach and larger 13/16 in. hex, so it should be matched by exact plug number rather than by brand or heat range alone. For marine, powersports, or classic-engine use, always confirm the plug chart before installing an iridium upgrade.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.