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Denso 671-4220 Spark Plug Wire Set
| Brand | Denso 671-4220 |
|---|---|
| Bushing Material | 4 |
| Distributor Coil End Terminal Type | Male |
| Insulation Outside Diameter | 7.00 |
| Spark Plug Boot Material | Sil PBT Sil |
| Spark Plug End Boot Degree | 120 |
| Spark Plug End Terminal Type | FEMALE |
| Product line | 7mm |
| Fits | Mazda · 10 vehicles |
OE-style replacement. Matches factory form, fit, color, and performance.
7mm wire design. Sized for dependable ignition performance.
Silicone boot material. Helps resist heat and maintain insulation.
Cross-references ACDelco 16-844A, Airtex 2X1489 and Autolite 96807 for the same application. See all 17.
Denso 671-4220 Spark Plug Wire Set
Denso 671-4220 is a 7mm spark plug wire set built to match factory-installed wire sets in form, fit, color, and performance. It is a direct OE-style ignition wire replacement for Mazda Miata models, with fitment for 1990-1997 and 1999-2000 applications.
Key Features
- 7mm insulation outside diameter for OE-style ignition wire routing and fit
- Sil PBT Sil spark plug boot material for durable terminal protection
- 120-degree spark plug end boot angle for the listed Miata applications
- Female spark plug end terminal type with male distributor/coil end terminal type
- Built to meet or exceed OE/OES standards for construction and performance
- Direct replacement part number 671-4220 for Mazda Miata ignition service
Product Details
Denso’s First Time Fit line is engineered as an OE replacement line for drivers who want the same basic fit and performance profile as the original wire set. This Denso 671-4220 spark plug wire set uses a 7mm insulation diameter and OE-style boot and terminal configurations to support proper ignition routing on Mazda Miata models. It is a practical choice when servicing ignition misfires, worn wire insulation, or aging boots on 1990-1997 and 1999-2000 Mazda Miata vehicles. This part cross-references NGK ZE21 for the same application.
Fitment
- Fits 1990-1997 Mazda Miata, N/A
- Fits 1999-2000 Mazda Miata, N/A
Common Replacement Reasons
- Engine misfire caused by worn ignition wires
- Hard starting related to degraded spark delivery
- Rough idle from cracked or aged wire insulation
- Intermittent spark loss from damaged boots or terminals
- Ignition performance issues on Mazda Miata 7mm applications
Installation Notes
Match each wire to the correct cylinder and verify terminal orientation before installation. Inspect the distributor and coil connection points for corrosion or carbon tracking, and route the wires away from hot or moving engine components. Confirm the 120-degree boot angle and terminal style align with the original layout on your Mazda Miata before final fitment.
Quality Assurance
Denso First Time Fit ignition wire sets are built to OE/OES standards and are intended to replicate factory-installed fit and performance characteristics. The 671-4220 part number is a direct reference for the listed Mazda Miata applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2000 | Mazda | Miata | N/A | 7mm |
| 1999 | Mazda | Miata | N/A | 7mm |
| 1997 | Mazda | Miata | N/A | 7mm |
| 1996 | Mazda | Miata | N/A | 7mm |
| 1995 | Mazda | Miata | N/A | 7mm |
| 1994 | Mazda | Miata | N/A | 7mm |
| 1993 | Mazda | Miata | N/A | 7mm |
| 1992 | Mazda | Miata | N/A | 7mm |
| 1991 | Mazda | Miata | N/A | 7mm |
| 1990 | Mazda | Miata | N/A | 7mm |
| No rows match your filter. | ||||