Accessory Drive Belt Guide for the 2007-2012 Mitsubishi Eclipse
Everything you need to know before replacing the accessory drive belt on your 4th Generation Eclipse.
- The 2.4L engine uses one belt, while the 3.8L V6 uses two; you must order the correct part for your engine.
- Aftermarket brands Bando and Mitsuboshi are OEM suppliers and offer the same quality as a dealer part for a lower price.
- If the belt breaks, the car will overheat and lose power steering, leaving you stranded.
- Always inspect the belt tensioner when replacing the belt, as faulty tensioners are a known issue on other Mitsubishi models from this era.
Understanding Your Eclipse's Accessory Belt System
Your 2007-2012 Mitsubishi Eclipse has one of two engine types, and they use different accessory belt setups. It is critical to know which engine you have before buying a new belt.
- 2.4L 4-Cylinder Engine: Uses a single, long serpentine belt for all accessories.
- 3.8L V6 Engine: Uses two separate belts. One main accessory belt and a second, smaller belt just for the power steering pump.
The most common mistake when ordering this part is buying a belt for the wrong engine. The belts for the 2.4L and 3.8L engines are different lengths and are not interchangeable. Always confirm your engine size before purchasing.
Symptoms of a Worn Accessory Drive Belt
A failing belt will almost always give you a warning sign. Ignoring it can leave you stranded. Look out for these common symptoms:
- Squealing Noises: A high-pitched squeal or chirp from the engine bay is the most common sign. This noise might be worse when you first start the car or turn on the air conditioning. 🎬 See how to diagnose the specific cause of your belt squeal.
- Visible Wear: Look at the belt itself. If you see cracks, frayed edges, missing pieces of the ribs, or a shiny, glazed surface, it's time for a replacement.
- Accessory Problems: If your power steering feels heavy, the A/C isn't blowing cold, or the red battery light comes on your dash, the belt may be slipping and failing to power those components properly.
- Overheating: The belt turns the water pump that circulates coolant through your engine. If the belt slips or breaks, the engine temperature will rise quickly, which can cause serious damage.
Choosing the Right Aftermarket Belt: Bando vs. Mitsuboshi
When it comes to aftermarket belts for a Mitsubishi, you are in a good position. The most commonly available premium brands, Bando and Mitsuboshi, are the same companies that likely made the original belt that came on your Eclipse from the factory.
- OEM vs. Aftermarket Quality: For this specific part, there is little to no quality difference between an OEM belt from a Mitsubishi dealer and a new aftermarket belt from Bando or Mitsuboshi. Both are considered top-tier, OE-equivalent brands known for durability and quiet operation. You can confidently choose either brand and expect excellent performance.
- Bando: A leading OE supplier for many Japanese car brands, including Mitsubishi. They are known for using high-quality EPDM rubber compounds that last a long time.
- Mitsuboshi: Another major OE supplier trusted by Honda, Subaru, and Mitsubishi. Their belts are manufactured to meet or exceed the strict standards required by automakers.
While replacing the belt, it's a smart idea to inspect the belt tensioner and any idler pulleys. If your Eclipse has over 100,000 miles, consider replacing the tensioner at the same time as the belt to prevent future problems. 🎬 Watch a complete walkthrough of the drive belt and tensioner replacement. A faulty tensioner can cause a new belt to wear out quickly or fall off.
Cost of Replacing the Accessory Drive Belt
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Belt (Bando, Mitsuboshi) | $16.15 - $45.14 |
| Shop Labor | $100 - $150 |
| Total Estimated Cost | $116 - $195 |
Cost estimates are for the belt only and do not include replacing the tensioner or pulleys. Prices can vary by location and repair shop.
Frequently Asked Questions
Are there any recalls for the accessory belt on my Eclipse?
No, there are no specific recalls for the accessory drive belt on the 2007-2012 Mitsubishi Eclipse. However, other Mitsubishi models from the same period were recalled for a faulty drive belt tensioner that could cause the belt to come off. This makes it extra important to inspect your tensioner during a belt change.
Is this a difficult job to do myself?
For many owners, yes. The 2.4L engine is considered very DIY-friendly and can often be done in under an hour with basic hand tools. 🎬 Watch this quick 5-minute serpentine belt replacement for 4-cylinder models. The 3.8L V6 is a bit more difficult because it has two belts and access can be tighter, but it is still a manageable job for an experienced home mechanic. Numerous video guides are available online for both engines.
How often should I replace the accessory belt?
Most modern accessory belts last between 60,000 and 100,000 miles. However, you should inspect the belt for cracks or wear during every oil change. If you hear any squealing or see visible damage, it should be replaced immediately, regardless of mileage.
Should I buy a belt and tensioner kit?
If your Eclipse has high mileage (over 100,000 miles) or if the tensioner pulley is noisy or wobbly, buying a kit that includes the belt, tensioner, and idler pulley is a great value. Replacing all the components at once is good preventative maintenance and ensures the entire system is reliable.
Helpful Videos
Technical Specifications
The 2007-2012 Eclipse uses two different accessory drive belt configurations depending on the engine. The 2.4L 4-cylinder uses a single serpentine belt (approx. 1890mm length, 6 ribs). The 3.8L V6 uses two belts: a main drive belt and a separate power steering belt (approx. 910mm length, 4 ribs).
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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