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NGK 4858 Spark Plug Wire Set
| Brand | NGK 4858 |
|---|---|
| Core Material | Mag (Var. Pitch) |
| Insulation Color | Blue |
| Insulation Material | Silicone |
| Insulation Outside Diameter | 7.00 |
| Noise Suppression Type | Yes |
| Part Number | RC-ZE81 |
| Stock Number | 4858 |
| Universal Or Specific Fit | Specific |
| Product line | NGK Spark Plug Wire Set |
| Fits | Mazda · 5 vehicles |
OE-standard replacement. Built to meet OE durability and performance expectations.
Silicone insulation. Helps resist heat and wear for dependable ignition performance.
Noise suppression. Helps reduce electrical interference in the ignition system.
Cross-references AMS Automotive 4858, Anchor 9864 and AP Exhaust 700087 for the same application. See all 6.
NGK Spark Plug Wire Set for Mazda RX-8
NGK Spark Plug Wire Set 4858 is a specific-fit ignition wire set for the 2004-2008 Mazda RX-8. Built with blue silicone insulation and noise suppression, it supports stable spark delivery while helping reduce electrical interference in the ignition system.
Key Features
- Specific-fit spark plug wire set for the Mazda RX-8
- Blue silicone insulation for heat and durability resistance
- Mag (var. pitch) core material for ignition performance
- Noise suppression type construction
- 7.00 mm insulation outside diameter
- NGK part number 4858 / RC-ZE81
Product Details
NGK Spark Plug Wire Set 4858 is part of the NGK Spark Plug Wire Set line, a product family focused on ignition components for domestic and import vehicles. NGK draws on extensive OE experience and long-term automotive manufacturing expertise to produce replacement ignition parts that meet OE-level durability and operational standards. For drivers searching for a 2004 Mazda RX-8 spark plug wire set, a 2005-2008 Mazda RX-8 ignition wire replacement, or NGK 4858 for Mazda RX-8 service, this wire set provides a direct-fit solution for the listed application.
This part cross-references Anchor 9864 and Dorman - HELP 55134 for the same application.
Common Issues This Part Can Address
- Misfires caused by worn or damaged ignition wires
- Rough idle from inconsistent spark delivery
- Electrical noise affecting ignition performance
- Hard starting related to degraded wire insulation
- Loss of engine smoothness under load
Installation Notes and Tips
Verify the wire routing and cylinder connection points before removal so the replacement follows the original layout. Inspect spark plugs, coil connections, and boots during service, since worn ignition components can affect wire performance. Confirm fitment for 2004-2008 Mazda RX-8 applications before installation.
Quality Assurance
NGK manufactures premium ignition products to OE standards and supports a broad range of domestic and import vehicle applications. Part number 4858 is identified as RC-ZE81 in NGK references.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2008 | Mazda | RX-8 | 1.3L | R2 | N/A | NGK Spark Plug Wire Set |
| 2007 | Mazda | RX-8 | 1.3L | R2 | N/A | NGK Spark Plug Wire Set |
| 2006 | Mazda | RX-8 | 1.3L | R2 | N/A | NGK Spark Plug Wire Set |
| 2005 | Mazda | RX-8 | 1.3L | R2 | N/A | NGK Spark Plug Wire Set |
| 2004 | Mazda | RX-8 | 1.3L | R2 | N/A | NGK Spark Plug Wire Set |
| No rows match your filter. | ||||||