What are the problems with the alternator in a Subaru?

Problems with the Alternator in a Subaru
The alternator in a Subaru can experience several problems, leading to various symptoms and issues. Here are some common problems associated with Subaru alternators:
1. ECU Modification for Subaru Alternators:
– Some Subaru models with C/S/L Mitsubishi and Hitachi 3-pin alternators, such as Forester 2001 to 2008, Impreza 2001 to 2007, and Legacy & Outback 2001 to 2008, may experience issues related to the ECU’s alternator charge cut-out function. The ECU has a function that reduces the alternator charge output if it detects a no-load situation, which can lead to reduced charge output.
2. Symptoms of a Failing Alternator:
– Symptoms of a failing Subaru alternator can include loss of power, warning lights illuminating, dashboard lights getting dimmer, and various warning lights illuminating.
3. Charging System Issues:
– A common indicator of a problem with the charging system, including the alternator, is the appearance of the charge warning light on the dashboard. This light resembles a car battery and may indicate that the charging system is not functioning as it should.
4. Electrical System Problems:
– A failing alternator can cause problems for the vehicle’s electrical systems, potentially leading to issues with powering various components while the vehicle is running.
5. Difficulty in Diagnosis:
– Diagnosing alternator problems can be challenging, as the symptoms of a failing alternator can mimic those of a dead or dying battery, making it tricky to pinpoint the exact issue.
6. Impact on Battery and Electrical Components:
– A failing alternator can give the same symptoms as a dead or dying battery, making it crucial to differentiate between the two issues.
It’s important to note that the alternator is a critical component of the vehicle’s charging system, and addressing any issues promptly is essential to ensure the proper functioning of the vehicle’s electrical and charging systems.
If you have further questions or need assistance with troubleshooting a Subaru alternator, it’s advisable to consult with a factory-trained technician or a Subaru service center for expert guidance and support.

When should I replace my Subaru alternator?

Weak Or Flickering Headlights
Any problem that involves electrical components like lights, audio equipment or climate controls could ultimately be traced to a bad alternator. One of the most common you’ll see first is headlights that are dim and may even flicker or fade as you drive.

How much does it cost to fix an alternator on a Subaru?

Our best estimate of the cost to replace an alternator is between $600 and $1,500. We can cite one recent example. A 2016 Subaru Forester in our vehicle fleet had an alternator fail. The local Subaru Dealer quoted us a replacement cost of almost exactly $1,000.

What kills alternators?

Factors such as heat, vibration, and electrical spikes can eventually cause the alternator to fail. According to Repair Smith, your car’s alternator may fail because of: Age and use-related wear. Engine oil of power steering fluid leaking onto the alternator.

What is the most common engine problem in Subaru?

What kind of engine problems does Subaru have? The most common problem you will hear about is blown head gaskets on the 2.5 ej motor.

How long do Subaru alternators last?

While a well-maintained alternator can last between 80,000 and 150,000 miles, being vigilant about maintenance, driving habits, and the electrical load on the system can contribute to surpassing these milestones.

What is the most common problem with an alternator?

One of the most common problems you’re likely to experience with an alternator is a failure in the bearings. There are needle bearings in the alternator that allow the rotor to freely spin inside the housing, and those bearings can break down over time as a result of exposure to heat and dirt.

Do alternators fail suddenly?

When your alternator begins to fail it can cause a variety of different electrical problems in your car, and eventually cause a breakdown. Alternators can go bad suddenly, or slowly over time. If your alternator is slowly going bad over time there are some warning signs you can look out for.

What is the main symptom of a bad alternator?

Dim Lights. An early warning sign that your alternator is going bad could be dim, flickering lights. This symptom could show up on any or all of your dashboard lights, reading lights, headlights or other lights. The alternator is supposed to provide the electricity for your car’s lights.

What is killing my alternator?

Factors such as heat, vibration, and electrical spikes can eventually cause the alternator to fail. According to Repair Smith, your car’s alternator may fail because of: Age and use-related wear. Engine oil of power steering fluid leaking onto the alternator.

Do Subarus have alternator problems?

Your Subaru has numerous systems that require electricity, and the alternator’s job is to produce this electricity. If the alternator is damaged or broken, your car will rapidly develop problems. These are a few of the signs that it’s time to visit your Subaru dealer for an alternator repair.