Product Overview

Offered as a direct replacement for the original ignition component, produced to the same dimensional and electrical specification so it can be fitted in the original position.

A replacement only works if nothing else has to change: no adapter, no harness modification, no recalibration. The thread, reach, seat and gap on this plug match the original, so the engine behaves exactly as it did before the change.

This spark plug series is widely applied in CHP plants, biogas stations, landfill gas projects and distributed power generation, where stable ignition directly determines electrical efficiency and heat recovery performance.

Storage: keep plugs in the original packaging, dry and free of impact. An insulator crack from careless handling is not a manufacturing defect and will not be covered.

Technical Specifications

Compatibility & Cross Reference

Note: OEM numbers are listed for reference only. Please confirm fitment against your engine model and serial number before ordering — we are happy to check it for you.

Why This Plug Performs

Package Reference

Standard packaging options are shown below. We can also supply neutral (unbranded) packing or fully customized packaging to your own artwork, logo and carton specification.

Bulk carton packing

Palletised packing

Export crate — wrapped & strapped

Packing configuration (pieces per carton, carton dimensions and gross weight) can be adjusted to your handling and warehouse requirements — please advise your preference when ordering.

Packing, Delivery & Customization

Production & Quality Control

Every TAKUMI plug comes off a vertically integrated line: precision grinding, laser welding, ceramic sintering and a full electrical test. Batch numbers are recorded for full traceability.

The stations below are the ones every production batch passes through — pressure and leakage, spark voltage analysis, ceramic high-voltage resistance, and an aging run. A plug only ships once it has cleared all four.

Pressure & leakage test

Spark voltage analysis

Ceramic high-voltage resistance test

Aging test

Quality is checked at the point of manufacture rather than at the point of complaint. That is what keeps behaviour consistent from the first plug of a set to the last.

Our production and quality system:

• Produced in ISO 9001 and IATF 16949 certified facilities.
• 100% tested before shipment — spark gap, resistance and seal checked unit by unit.
• Factory-direct supply chain, so specification consistency is maintained batch to batch.

FAQ

Q: How do I know it fits my engine?
A: Send us your engine model and serial number, or the OEM part number currently in the engine. We will cross-check it against our reference list and confirm before you order.

Q: What if a plug fails?
A: We warrant our spark plugs against manufacturing defects for a limited period from delivery. Spark plugs are consumable items: the warranty does not cover normal wear, damage from incorrect installation, engine faults, fuel or gas quality problems, or use outside the specified application.

Q: Can I fit this without changing engine settings?
A: Yes. The S-R6A12 reproduces the original thread, reach, seat and gap, so it is a drop-in replacement. No ECU or ignition-parameter change is needed.

Q: How long will the plug last in service?
A: Our design life for the S-R6A12 is 6,000–10,000 hours. Actual service life depends on gas quality, load profile and maintenance regime.

Get a Quote

Send us the number currently fitted and we will confirm the equivalence in writing before you order.

TAKUMI JAPAN AUTO PARTS CO., LTD.  |  Takumi, a Symbol of Quality & Reliability!