SKU: 84733041132

NGK Iridium IX Spark Plug for Mazda - TR55IX

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Description

NGK Iridium IX Spark Plug for Mazda - TR55IXVehicle Fitment & Part Details This NGK Iridium IX spark plug (TR55IX) is supplied as an OEM grade replacement. Part of the NGK Iridium IX range. Thread M14 x 1,25. Verify VIN engine before ordering. Key Details SKU TR55IX Component Spark Plug Brand NGK Model Iridium IX Part MPN 7164 GTIN Barcode 087295171646 Trade Numbers TR55IX Product Specifications Thread Size M14 x 1,25 Thread Length [mm] 17,5 Spanner Size 16 mm Spark Position [mm] 4,0 Electrode

Vehicle Fitment & Part Details

This NGK Iridium IX spark plug (TR55IX) is supplied as an OEM-grade replacement. Part of the NGK Iridium IX range. Thread M14 x 1,25. Verify VIN/engine before ordering.

Key Details

SKU
TR55IX
Component
Spark Plug
Brand
NGK
Model
Iridium IX
Part MPN
7164
GTIN / Barcode
087295171646
Trade Numbers
TR55IX

Product Specifications

Thread Size
M14 x 1,25
Thread Length [mm]
17,5
Spanner Size
16 mm
Spark Position [mm]
4,0
Electrode / Construction
Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with taper gasket seat, Fixed SAE connector
Brand Class
Premium

Vehicle Compatibility

Common fitments include Mazda (MX-5). Always confirm the correct heat range and electrode design for your specific engine variant by VIN before ordering.

OEM Reference Numbers

Vehicle OE Numbers

  • Ford: 3333704, 3539125
  • Mazda: LFY3 18 110

Aftermarket Equivalents

  • Borgwarner (Beru): 0002630900, 0 002 630 900, 14KR 8DPUOV, 14 KR 8 DPU0V, Z 148
  • Bosch: HR9DPY, HR 9 DCY, HR8DCV, 0 242 229 737, H8DCX, 26, 79016, 0242225534, +4 more
  • Champion: RS12YC6, RS 14 YC6 T04, RS14YC6
Alternate OEM Search References: LFY318110, 14KR8DPUOV, 14KR8DPU0V, Z148, HR9DCY, 0242229737

Fitment Notes

  • Always match heat range, thread size and electrode design before ordering. Verify VIN/engine.

Important: Spark plugs are not returnable, exchangeable, or refundable once fitted. Confirm you are ordering the correct part for your vehicle. Compare the new spark plug to the removed plug for thread reach, thread diameter, hex size, electrode style, gap specification, and heat range before fitting. Mismatched spark plugs can cause misfires, pre-ignition, detonation, fouling, or engine damage.

Returns Notice: Once a spark plug has been fitted or threaded into a cylinder head, it cannot be returned, exchanged, or refunded under any circumstances.

Installation / Use / Maintenance Tips

  • Allow the engine to cool fully before removal - cylinder heads are easily damaged when warm.
  • Use the correct deep-socket plug spanner (16 mm) and avoid impact tools.
  • Inspect the existing plug for fouling, oil contamination, or worn electrodes - may indicate engine condition issues.
  • Verify the gap if your supplied plug is not factory-set; consult your service manual for the correct value.
  • Apply a small amount of anti-seize to the threads (sparingly) and torque to manufacturer specification.

Common Questions

Will this NGK spark plug fit my Mazda?
This part (TR55IX) is listed for the applications shown on this page. Always confirm the correct heat range, thread size and electrode design against your vehicle's service manual or a parts lookup before ordering. Verify VIN/engine.

What does the NGK part code mean?
The NGK trade number encodes physical and performance characteristics - thread/reach, electrode design, heat rating, and projection. Each digit and letter has meaning in NGK's naming convention. The heat range is usually the standalone digit (e.g. BPR6ES is heat range 6).

What is the difference between this NGK plug and a Bosch / Champion / Denso equivalent?
The cross-references listed under OEM Reference Numbers are functionally equivalent for the same applications, but materials, electrode design and heat dissipation can differ slightly. NGK is OEM-supply quality and most manufacturers specify NGK or Denso as their factory plug.

How do I confirm fitment if my engine variant isn't listed?
Match the supplied thread size, reach, electrode design and heat range against your existing plug. If unsure, request fitment assistance before ordering.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 84733041132

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4.5 ★★★★★
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Sheila
Los Angeles, US
★★★★★ 3
Mostly works, but..........
I use these at night for sleeping with a CPAP. I am a mouth breather, so my CPAP mask is a full face mask, thus there is constant airflow going into my mouth all night long. While these tablets do help with reducing dry mouth, they only last about 4-5 hrs before they fully dissolve - which does not get me through a full night of sleep. Using two tablets instead of one only gives me roughly one additional hour. If you wear a CPAP mask, you also need to be careful of exactly where you place the tablets, because it will be quite uncomfortable if you mask ends up pressing on the tablet. If the tablet does not adhere well upon initial placement, you pretty much need to fully dry the tablet before re-attempting placement. If the brown side is already wet when you place it against your gums, there is a much higher chance of it just sliding off, instead of sticking. Overall, while not completely eliminating the issue, they do at least reduce the dry mouth problem during sleep.
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Reviewed in the United States on January 21, 2025
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Jfaith
Houston, US
★★★★★ 5
Stays put and dissolves slowly. Orange flavor is nice.
If you have to use something overnight for dry mouth definitely get these. I use one nightly with my mouth guard. The orange flavor is very nice and it dissolves slowly overnight. It's small enough to do the trick, but not be overpowering. It stays put. And it works. Definitely notice the improvement inside my mouth.
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Reviewed in the United States on November 13, 2025
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Irina Wen
Houston, US
★★★★★ 5
This is a seminal book on psychotherapy. A must have!
Format: Hardcover
In the age of virtual (dis)connection, concerning high rates of depression and anxiety, and the importance of self-reliance and individualism, this book comes as a lighthouse of hope and direction. Attachment Theory in Practice is a must-have for any therapist who is looking to deepen their work and bring desired transformation and change to their clients’ lives. The book provides a beautiful overview of the current state of the mental health field and the need for focusing on emotion, attachment and connection in psychotherapy. Dr. Johnson reminds us that “in order to shape optimal regulation that allows clients to harness their emotions for growth and aliveness, therapists have to ensure that clients are actively engaged with an emotional reality.” She echoes the findings from research on emotion regulation and suggests that “coregulation, rather than solo self-regulation, is the baseline, normal, and most-efficient strategy for us as social animals.” Dr. Jonson clearly posits that change is an emotional and an interpersonal phenomenon. The book also outlines very practical guidance to working with couples, individuals, and families using the the attachment framework and EFT. As a therapist who is interested in science and empiricism, I am delighted to see the tremendous amount of research support EFT for couples has received over the past decade and I look forward to learning more about the findings in the areas of EFIT and EFFT.
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Reviewed in the United States on July 1, 2019
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CC Tsai
Cuba, US
★★★★★ 5
A Foundational Book in EFT
Format: Hardcover
In a field of books about EFT, Sue Johnson’s new book provides an up-to-date summary of the latest developments in the EFT method, including applications for individual, couple and family therapy. Having been a student of EFT for 12 years or more, this book was more than a repetition of the fundamentals of the method, its stages and steps, which appear in her earlier books and have been elaborated by other authors. Here, I found her efforts to situate EFT conceptually in the field of psychotherapy, not only its attitude toward defining health and distress, but the underlying principles for its attitude toward how change occurs and its unique principles for how therapists help clients (individual, couple or family) foster change in themselves and their lives. She explains and illustrates the use of the EFT Tango moves, which implement the EFT method within the clinical dialogue and actualize the change process. No doubt, this book will become a primary source for future EFT training and is worth both reading and mastering cover-to-cover.
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Reviewed in the United States on June 21, 2019
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Tracy Lewis
Whiting, US
★★★★★ 5
Broadens EFT Couple frame to individual and family work
Format: Hardcover, Format: Hardcover
I am really digging in to this. Even though it is an academic book, I find it highly readable and pragmatic. I am chewing slowly on pieces and am using my attachment TANGO (read the book) with my individual clients to great effect. Previously I would use an attachment frame but it wasn’t as focused and organized. Really an orienting perspective. Of course I am also integrating this precisely written guide with my couples, as I am an EFT couple therapist. And for classroom teaching the first few chapters alone highlight—and back up with research the reliability of attachment as a unifying frame. I call it my “map for human” and it Really is. Thank you Sur for putting all that research in one place.
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Reviewed in the United States on February 15, 2019

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