MAZDA AJ03-11-SG0 Upper Bearings

( Part Type: Bearing ), ( Manufacturer Part Number: AJ03-11-SG0 ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Year: 2000 2001 2002 2003 2004 2005 2006 2007 2008 ), ( Parts Included: Only Part Reference 28 On The Diagram Is Included ), ( Replaces Part Number: Many Parts. See Description Details Below )

Review MAZDA Genuine Upper Bearings fits 2000–2008

Introducing the Mazda AJ03-11-SG0 Upper Bearings, a crucial component for maintaining the smooth operation of your Mazda engine. These bearings are specifically designed for the Mazda AJ series engines, ensuring a perfect fit and optimal performance.

The Mazda AJ03-11-SG0 Upper Bearings are engineered using high-quality materials that provide exceptional durability and resistance to wear and tear. The outer race of these bearings is made from a strong steel alloy, while the inner race and rolling elements are made from heat-treated steel for enhanced strength and durability. The bearing surfaces are precision machined and polished to ensure a perfect fit and minimize friction.

These bearings are designed to support the crankshaft in the engine, allowing it to rotate freely while withstanding the immense forces generated during engine operation. The Mazda AJ03-11-SG0 Upper Bearings are also engineered to provide excellent load-carrying capacity, ensuring that they can handle the weight and pressure of the engine without fail.

The Mazda AJ03-11-SG0 Upper Bearings are easy to install and require no special tools or expertise. However, it is always recommended to replace them as a pair, along with the lower bearings, to ensure even wear and optimal performance.

In summary, the Mazda AJ03-11-SG0 Upper Bearings are a must-have for Mazda AJ series engine owners who want to ensure the longevity and optimal performance of their engines. These high-quality bearings are designed to provide exceptional durability, resistance to wear and tear, and easy installation, making them a smart investment for any Mazda enthusiast.

Mazda AJ03-11-SG0 upper bearings are an essential component of the engine's crankshaft bearing assembly. Replacing these bearings can help improve engine performance, prevent potential damage, and ensure smooth operation. However, like any automotive part, there are pros and cons to consider before making a purchase.

1. Improved Engine Performance: Worn-out upper bearings can cause crankshaft vibration and reduced engine power. Replacing them can help restore engine performance and improve overall drivability.

2. Preventing Potential Damage: Worn-out upper bearings can lead to more significant problems, such as crankshaft damage or even engine failure. Replacing them proactively can help prevent these costly repairs.

3. Smooth Engine Operation: Upper bearings help reduce friction and ensure that the crankshaft rotates smoothly. Replacing worn-out bearings can help reduce engine noise and vibration, leading to a more comfortable driving experience.

1. Cost: Replacing upper bearings can be a costly repair, especially if it's a part of a larger engine rebuild or overhaul. The labor and part costs can add up quickly.

2. Time: Replacing upper bearings can be a time-consuming process, especially if you're doing it yourself. It requires specialized tools and knowledge to remove the crankshaft and replace the bearings.

3. Risk of Damage: Removing and installing the crankshaft carries some risk of damage, especially if you're not experienced in performing this repair. Dropping the crankshaft or damaging the journals can lead to costly repairs or even engine replacement.

Replacing Mazda AJ03-11-SG0 upper bearings can help improve engine performance, prevent potential damage, and ensure smooth operation. However, the cost and time involved can be significant, and there is some risk of damage during the repair process. If you're experiencing engine vibration or noise or if you're performing a larger engine rebuild, it may be worth the investment to replace the upper bearings. However, if your engine is running smoothly and you're not experiencing any issues, it may be best to hold off on this repair until it's absolutely necessary.

If you're experiencing engine vibration or noise and suspect that the upper bearings may be worn out, it's worth considering replacing them. However, if your engine is running smoothly and you're not experiencing any issues, it may be best to hold off on this repair until it's absolutely necessary. If you do decide to replace the upper bearings, consider using a reputable mechanic or engine shop to ensure that the repair is done correctly and efficiently.

Details:

Main bearings. Electrical parts are not returnable. Parts must be resalable and in the original packaging. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.

Subaru, Ram, Dodge, Chrysler, Jeep, Toyota, Scion, Mazda, Volkswagen, or sprout recommended parts are an important part of maintaining your vehicles optimum performance.

part #: aj0311sg0 prices

• $64.95-$69.50

specifications engibearing:

• for makes: Mazda
• for years: 2000-2008
• part type: Bearing
• manufacturer part number: AJ03-11-SG0
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• year: 2000 2001 2002 2003 2004 2005 2006 2007 2008
• parts included: Only Part Reference 28 On The Diagram Is Included
• replaces part number: Many Parts. See Description Details Below

shipping engibearing:

• transit: 5-11 Days
• type: Fixed
• class: Standard
• cost: $0.00
• service: Standard

seller engibearing:

• # reviews: 25525
• city: Brunswick, Ohio
• rating: 98.9%

offer engibearing:

• options: Ship-to-home
• availability: In Stock
• quantity: 4
• started: November 28, 2025
• sold: 0

general engibearing:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Engine Bearings

payments engibearing:

• credit card: Visa
• other
• wallet: Google-pay

returns engibearing:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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