Vehicle Compatibility
The AutoPart T ST-4239 fits a wide variety of Hyundai and Kia vehicles equipped with compatible 1.8L and 2.0L inline-four engines.
Hyundai Elantra
- 1996–1997 1.8L
- 1998 1.8L
- 1999–2012 2.0L
Hyundai Tiburon
- 1997 1.8L
- 1997–2001 2.0L
- 2003–2008 2.0L
Hyundai Tucson
- 2005–2008 2.0L
Kia Soul
- 2010–2011 2.0L
Kia Spectra
- 2004–2009 2.0L
Kia Spectra5
- 2005–2009 2.0L
Kia Sportage
- 2005 2.0L
Always verify compatibility using your VIN, engine code, or OEM part number before purchasing.
Key Features
OEM-Style Direct Replacement
The ST-4239 is manufactured to match factory specifications for proper routing, wire length, and electrical performance.
Benefits include:
- Direct installation
- Factory-style fit
- No modifications required
- Plug-and-play replacement
7mm Ignition Wires
Each ignition wire features a 7mm diameter engineered to provide dependable spark delivery while maintaining durability in everyday driving conditions.
Advantages include:
- Stable ignition performance
- Efficient voltage transfer
- Reliable engine operation
- Consistent combustion
High-Temperature Silicone Boots
The spark plug and distributor boots are manufactured from premium silicone to withstand the harsh environment inside the engine compartment.
Silicone construction helps resist:
- High temperatures
- Moisture
- Oil contamination
- Cracking
- Abrasion
This helps extend service life while maintaining dependable ignition performance.
Corrosion-Resistant Snap-Lock Terminals
Each terminal features a positive snap-lock design that securely clicks into place during installation.
Benefits include:
- Secure electrical connection
- Easy installation and removal
- Improved vibration resistance
- Long-lasting conductivity
Built to Meet OE Standards
The ST-4239 ignition wire set is engineered to meet original equipment performance standards, including:
- Proper conductor design
- Factory-spec wire lengths
- Correct wire diameter
- Reliable insulation
- OEM-style terminal fitment
This helps ensure consistent ignition performance comparable to the original factory components.
Installation Tips
Replacing spark plug wires is a straightforward maintenance task.
For best results:
- Replace one wire at a time.
- Match each replacement wire to the original length.
- Ensure every boot fully seats on the spark plug and ignition component.
- Route wires through factory retainers.
- Replace spark plugs if they are due for service.
Replacing both spark plugs and ignition wires together often provides the greatest improvement in ignition performance.
Warranty Coverage
AutoPart T includes a one-year limited warranty, providing coverage against manufacturing defects while offering additional peace of mind for routine maintenance.
Final Verdict
The AutoPart T ST-4239 Ignition Spark Plug Wire Set offers an affordable, OEM-style solution for restoring ignition performance in a broad range of Hyundai and Kia vehicles. Its 7mm wire construction, silicone insulation, corrosion-resistant terminals, and direct-fit design make it a practical choice for DIY mechanics and professional technicians alike.
If your vehicle is showing signs of worn ignition wires or you’re completing a scheduled tune-up, this replacement set provides dependable spark delivery, straightforward installation, and solid value.
Frequently Asked Questions
How often should spark plug wires be replaced?
Most ignition wires should be inspected during every tune-up and replaced between 60,000 and 100,000 miles, depending on operating conditions and manufacturer recommendations.
Can worn spark plug wires reduce fuel economy?
Yes. Weak spark caused by deteriorated ignition wires can reduce combustion efficiency, leading to lower fuel economy and increased emissions.
Is this a direct replacement?
Yes. The ST-4239 is designed as a direct-fit replacement for compatible Hyundai and Kia applications without requiring modifications.
Should spark plugs be replaced at the same time?
Replacing spark plugs and ignition wires together is recommended because both components wear over time and work together as part of the ignition system.
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