Thursday, July 25, 2024

Unraveling the Steps: Detailed Guide to Subaru Impreza Starter Motor

You’re not alone if you’re experiencing issues with your Subaru Impreza’s starter motor. This essential component is responsible for getting your car’s engine running, and when it fails, it can be frustrating. But fear not; we’ve covered you with a detailed guide on tackling this problem. In this step-by-step tutorial, we’ll walk you through replacing your Subaru Impreza Starter Motor, ensuring you have all the necessary tools and knowledge to complete the job. So, let’s unravel the steps and get your Impreza back on the road in no time!

Understanding Your Subaru Impreza’s Starter Motor

A Subaru Impreza’s starter motor is essential in getting your engine up and running. It operates by engaging with the vehicle’s engine flywheel to rotate the engine at a speed sufficient for ignition, thereby starting your car. In newer models, this component is electrically powered and activated when you turn the ignition key or press the start button. Its operation is integral to the ignition system, initiating the process that leads to engine combustion.

A deeper comprehension of the starter motor’s functionality can help identify when it may be malfunctioning due to wear and tear or electrical issues. Understanding this component’s operation and significance in your vehicle’s ignition system is the first step towards diagnosing potential problems and determining the need for maintenance or replacement.

Knowing its mechanism and role within the broader system of your Subaru Impreza ensures that you are better equipped to recognise early signs of failure and address them promptly, thus preventing possible stranded situations or further damage to your vehicle’s engine system.

Symptoms of a Failing Starter Motor

Identifying the early signs of a failing starter motor is crucial for preventing further damage to your Subaru Impreza’s engine system. One of the most telling signs is a distinctive clicking sound when you attempt to start the engine, which often signifies that the starter motor is not engaging correctly.

Additionally, if you notice that the engine cranks over more slowly than usual, this can indicate that the starter motor is struggling to turn the engine at the necessary speed for ignition, in more severe cases, the engine may not turn over at all, suggesting a complete failure of the starter motor.

Other symptoms may include intermittent starting issues, where the engine sometimes starts without issue but fails at different times, pointing towards an inconsistent starter motor operation. These signs should prompt a thorough inspection and potential starter motor replacement to ensure your vehicle remains reliable and ready to start when needed.

Tools and Preparations for Installing Ej25 Starter Motor

Installing a starter motor on an Ej25 Starter Motor engine involves essential tools and preparations to ensure the job goes smoothly. Refer to your Subaru’s specific service manual for detailed instructions and torque specifications, as they vary slightly between different models and years. Here’s what you’ll typically need:

Tools Needed

  1. Socket Set and Wrenches: You’ll need various socket sizes (typically 8mm, 10mm, 12mm, 14mm) and wrenches to access and remove bolts and nuts.
  2. Screwdrivers: Flathead and Phillips screwdrivers for various fasteners.
  3. Torque Wrench: To tighten bolts to the manufacturer’s specifications.
  4. Jack and Jack Stands: These are for safely raising and supporting the vehicle.
  5. Safety Gear: Gloves and safety glasses to protect yourself during the installation.
  6. Starter Motor: Ensure you have the replacement starter motor ready.


  1. Disconnect Battery: Before starting any work, disconnect the battery’s negative terminal to prevent any electrical mishaps.
  2. Access the Starter: Depending on your Subaru model, the starter motor is typically located near the transmission bell housing on the backside of the engine.
  3. Inspect and Clean: Before installing the new starter motor, inspect the mounting area for debris or corrosion. Clean as necessary to ensure a good connection.
  4. Installation: Follow these general steps for installation:
    • Remove any components obstructing access to the starter motor.
    • Disconnect the wiring harness connected to the starter motor.
    • Remove the bolts securing the starter motor to the engine block or transmission bell housing.
    • Carefully maneuver the old starter motor out of its position.
    • Install the new starter motor in the reverse order, ensuring all bolts are tightened securely.
    • Reconnect the wiring harness.
    • Double-check all connections before reconnecting the battery.
  5. Testing: After installation, reconnect the battery and test the starter motor to ensure it engages properly.

Locating the Starter Motor in Your Subaru Impreza

To accurately locate the starter motor in your Subaru Impreza, you’ll primarily focus on the area near the bottom of the engine, adjacent to the gearbox. The exact position can vary depending on the model and year of your Impreza, so it’s highly recommended that you consult the vehicle’s manual for precise location details.

In most cases, it’s on the engine’s side facing the gearbox, possibly hidden under other components or shielded by a protective cover. Given its location, visibility might be somewhat limited, especially from above, necessitating a look underneath the vehicle.

Hence, safely elevating your Subaru on a set of axle stands will provide you with the necessary access and visibility. Remember to ensure that the vehicle is securely supported before attempting to locate or work on the starter motor to avoid any risk of injury. Locating the starter motor is a crucial step in the process of its replacement, as understanding its position will guide you in efficiently removing the old unit and fitting the new one with minimal complications.

Removing the Old Starter Motor

Begin the removal process by ensuring the Subaru Impreza is safely elevated and securely positioned on axle stands, providing sufficient access to the starter motor near the gearbox. With the vehicle’s battery disconnected to eliminate the risk of electrical shocks or shorts, detach the electrical connectors linked to the starter motor. These connectors are typically secured by nuts or clips, which must be carefully removed using the appropriate tools. Pay attention to how these connectors are arranged to facilitate an accurate reconnection with the new starter motor.

Following the disconnection of the electrical components, the next step involves loosening and extracting the mounting bolts that anchor the starter motor to the engine block. Depending on their size and the space available around the starter motor, these bolts may require different tools, such as ratchets and sockets. Please exercise caution when handling these bolts, as they are integral to keeping the starter motor firmly in place.

Once the mounting bolts are removed, gently manoeuvre the starter motor away from its position. This step may require some adjustments to angles and positions, as the space can be restrictive. It’s essential to care for the starter motor to avoid damage to surrounding components. Upon successfully removing the old starter motor, it’s prudent to compare it with the replacement unit to ensure compatibility before proceeding with installing the new starter motor. This comparison should include checking the mounting points, electrical connector configurations, and dimensions.

Choosing the Right Replacement Subaru Forester Starter Motor

Selecting the correct replacement starter motor for your Subaru Forester involves carefully considering several factors. Ensure the starter motor matches your Forester’s specific model, year, and engine type.

Compatibility is crucial to guarantee the new Subaru Forester Starter Motor fits perfectly and operates efficiently without causing electrical or mechanical issues. It’s advisable to consult the vehicle’s service manual or seek advice from a professional to ascertain the correct specifications required for your car. Additionally, opting for a starter motor from reputable manufacturers or suppliers can significantly influence the component’s durability and reliability.

Whilst aftermarket parts might offer a cost-effective alternative, ensure they meet OEM (Original Equipment Manufacturer) standards to avoid compromising performance. Checking for any warranties or guarantees provided with the starter motor can also offer peace of mind, ensuring your investment is protected. When selecting your replacement starter motor, these steps will ensure a harmonious match with your Subaru Forester, resulting in optimal starting performance and long-term reliability.

Wiring the New Subaru’s Impreza Starter Motor

Once the new starter motor is positioned correctly near the gearbox, the critical step is to reattach the electrical connections meticulously. Begin by locating the main power lead detached from the old unit and securely connecting it to the terminal on the new starter motor. It’s imperative to ensure this connection is tight and secure to prevent potential electrical issues.

Next, reattach any smaller wires or connectors that power other components or sensors related to the starter system. These might include the solenoid trigger wire, which is crucial for the starter’s operation. Use the notes or photographs you took while removing the old starter motor as a guide to ensure accurate reconnection. Care should be taken to route the wires away from any moving parts or sources of heat that could damage the insulation or connectors over time.

Once all electrical connections have been reestablished, proceed with bolting the starter motor to the engine block, referring to the specific torque settings recommended by Subaru. This precision ensures the motor is adequately secured without over-tightening, which could damage the mounting points or the starter motor itself. Reconnecting the battery should be the final step, as well as completing the electrical circuit and preparing your Subaru Impreza for a successful start.

Avoiding Common Installation Mistakes

Ensuring a flawless installation of your Subaru’s Impreza starter motor hinges on meticulously adhering to the manufacturer’s guidelines and carefully re-examining all connections before initiating the engine. A common pitfall to sidestep is the improper alignment of the starter motor, which can lead to ineffective engagement with the engine flywheel, manifesting as grinding noises or failure to start.

Additionally, overtightening the mounting bolts can damage the starter motor housing, while insufficient torque may result in a loose connection, causing erratic starting behaviour. Equally important is the correct reattachment of all electrical connectors, including the main power lead and solenoid trigger wire, ensuring they are snug and secure.

Neglecting to do so could lead to electrical malfunctions or starting inconsistencies. It’s also prudent to safeguard the wiring against potential abrasions or heat damage by securing them away from moving parts and heat sources. By circumventing these common oversights, you can considerably enhance the likelihood of a successful installation and reliable starter motor performance.

Troubleshooting Common Issues

Should you face challenges during or subsequent to fitting your Subaru Impreza’s starter motor. There atre several steps that can be undertaken to diagnose and rectify these difficulties. Begin by meticulously checking all electrical connections, ensuring they are secure and correctly matched to their respective terminals. A common issue stems from loose or improperly attached connectors, which can inhibit the starter motor’s function.

Additionally, assess the condition of the wiring for any signs of wear or damage that could impede electrical flow. It’s also worthwhile to verify the compatibility of the replacement starter motor again. As discrepancies in model or specifications can lead to operational failures. If the engine still refuses to start or exhibits unusual sounds upon attempting to do so. Consulting the vehicle’s manual may offer specific guidance tailored to your model.

Alternatively, seeking the assistance of a professional mechanic can provide a more in-depth analysis, particularly if the problem persists. This approach ensures a comprehensive examination beyond the scope of initial checks and adjustments. Aiming to identify and resolve more complex issues that may take time to be apparent.

Maintaining Your Ej20 Starter Motor for Longevity

Regular maintenance is paramount to ensure the prolonged performance and reliability of your Ej20 Starter Motor.

  • Firstly, keeping the battery in good condition is advisable, as a failing battery can exert undue strain on the starter motor, leading to premature wear.
  • Secondly, periodic inspections of the starter motor and its connections can help identify signs of corrosion or wear early on. If necessary, ensure that the electrical connections remain tight and free from corrosion by applying a suitable anti-corrosion spray.
  • Additionally, listening for any unusual noises during engine start can be an early warning sign of potential issues. Prompt inspection and rectification can prevent more significant problems if you detect any irregularities.
  • Finally, consulting your vehicle’s service manual for specific maintenance recommendations tailored to your Subaru Impreza. It can help maintain the optimal performance of your Ej20 starter-motor over its lifespan.


In summary, replacing the starter motor in your Subaru Impreza, whether an Ej25 or Ej20 model. It is manageable when approached with the proper knowledge and tools. By following the outlined steps, from identifying symptoms of a failing starter motor to installing and maintaining the new unit. You can ensure your vehicle remains reliable and ready to start. Remember, paying close attention to the installation process and avoiding common mistakes is vital to a successful replacement. With your new starter motor, your Subaru Impreza is set for many more miles of dependable service.


Q: How do I know if my starter motor is the cause of my starting issues?

A: If you’re experiencing slow cranking, a clicking sound with no engine start. Or intermittent starting problems, these may indicate a failing starter motor. A diagnostic test is recommended for a more precise identification.

Q: Can I replace the Subaru Impreza Starter Motor by myself?

A: Yes, with the right tools, knowledge, and this guide, replacing the starter motor is a manageable task. However, seeking professional assistance is advisable if you need clarification on the process.

Q: How long does a starter motor last?

A: The lifespan of a starter motor can vary based on usage and maintenance but typically lasts between 100,000 and 150,000 miles. Regular inspections and maintenance can help extend its lifespan.

Q: What should I do if the new starter motor doesn’t solve the starting issues?

A: Ensure all connections are secure and correctly attached. If problems persist, the issue may lie elsewhere in the electrical system or with the battery. Consulting a professional mechanic for a comprehensive diagnosis is recommended

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