How long do Subaru spark plug wires last?
Subaru vehicles are known for their reliability and performance, but like all cars, they require regular maintenance to keep them running smoothly. One critical component of your Subaru's ignition system is the spark plug wires. These wires play a vital role in delivering the electrical current from the ignition coil to the spark plugs, ensuring your engine fires properly. But how long do these spark plug wires typically last? Let’s dive into the details.
Understanding the Lifespan of Spark Plug Wires
The lifespan of spark plug wires can vary depending on several factors, including the quality of the wires, driving conditions, and how well the vehicle is maintained. For most Subaru models, spark plug wires are designed to last between 60,000 and 100,000 miles. However, this is a general guideline, and some wires may last longer or need replacement sooner based on specific circumstances.
Signs That Your Spark Plug Wires Need Replacement
It’s essential to recognize the signs of worn-out spark plug wires to avoid engine performance issues. Here are some common indicators that it might be time to replace them:
- Engine Misfires: If your engine is misfiring or running rough, it could be due to faulty spark plug wires failing to deliver a consistent electrical current.
- Decreased Fuel Efficiency: Worn-out wires can cause incomplete combustion, leading to reduced fuel efficiency.
- Visible Damage: Cracks, burns, or corrosion on the wires are clear signs they need to be replaced.
- Check Engine Light: A malfunctioning ignition system can trigger the check engine light on your dashboard.
Tips for Maintaining Spark Plug Wires
To extend the life of your Subaru’s spark plug wires and ensure optimal performance, follow these maintenance tips:
- Regular Inspections: Check the wires periodically for any visible signs of wear or damage.
- Replace Alongside Spark Plugs: When replacing spark plugs, consider replacing the wires at the same time to maintain a balanced ignition system.
- Use OEM Parts: Always opt for high-quality, original equipment manufacturer (OEM) spark plug wires for the best performance and longevity.
- Avoid Harsh Conditions: Minimize exposure to extreme heat, oil leaks, or other conditions that can degrade the wires over time.
When to Consult a Professional
If you’re unsure about the condition of your spark plug wires or are experiencing engine performance issues, it’s always a good idea to consult a professional mechanic. At Kevin’s Autos, we specialize in Subaru maintenance and repair, ensuring your vehicle gets the care it deserves. Our experienced technicians can inspect your ignition system and replace spark plug wires if necessary, helping you avoid costly repairs down the road.
Remember, regular maintenance is key to keeping your Subaru running smoothly. If you have any questions or need assistance, don’t hesitate to reach out to us at Kevin’s Autos!
Frequently Asked Questions
How long do Subaru OEM spark plugs last?
Experts generally recommend replacing spark plugs every 30,000 miles for the best results. If one of your Subaru spark plugs gets out of whack, it can cause a reduction in gas mileage and engine problems later on.
Do new spark plug wires make a difference?
Benefits of Replacing Spark Plugs & Wires
New spark plugs help to ensure that each cylinder is firing correctly, while new wires help to prevent interference from other electrical components. Fully operational spark plugs will provide a completely operational combustion process.
How do I know if my Subaru spark plugs are bad?
One of the first signs of spark plug wear is trouble starting your Subaru. If the engine cranks longer than usual before starting or if you experience intermittent starting issues, it's time to inspect your spark plugs.
How long do OEM spark plug wires last?
Wires made today can go 50 -100K miles without any problem. The first sign that its time is some ignition noise in the radio, or a slightly rough idle in the morning. If I'm replacing plugs, I replace wires.
How often should spark plug wires be replaced?
Spark plug wires should be changed every 30000 to 50000 miles or when your owners manual recommends. A visual inspection should be performed at each oil change. I have seen wires chewed by mice, rats and squirrels, often times it's obvious and o...
Should you replace all spark plug wires at once?
You can replace as many as you want at the same time. The reason people say that you should replace one at a time is to make sure you don't run the wrong wire to a spark plug. If you do cross wires, the engine won't run very well.
What are the symptoms of a bad spark plug wire?
The most obvious sign of faulty spark plug wires is your vehicle just feels a little 'off. ' It would probably start slowly with reduced gas mileage but could progress to no acceleration. Faulty spark plug wires or spark plug misfires can also cause problems starting your engine, a rough idle, and loss of power.
How do I know when my spark plug wires need replacing?
With the engine running, move the test light along the length of each spark plug wire. If a spark jumps from a plug wire to the test light at any point, this is an indication that the insulation has broken down, and the spark plug wire should be replaced.
How often should spark plugs be changed on a Subaru?
Maintenance Tips for Subaru Spark Plugs
This includes following Subaru's recommended service intervals—typically every 60,000 miles for standard replacements. However, this can vary based on your driving habits and the specific Subaru model.
What is the life expectancy of spark plug wires?
There's no set period of time. They work until they don't. And even then, they don't all fail at the same time. I've heard of individual plug wires failing after just a few years, and I've personally seen 50 year old wires that were still on the job and working fine.
