OE QUALITY 1117921 Alternator Cw 1117917 Medium/ 21SI 12V 160A

( Brand: Oe Quality ), ( Manufacturer Part Number: 1117921 ), ( Type: Alternator ), ( Amperage: 160 A ), ( Features: Clockwise Rotation ), ( Oe/oem Part Number: 1117917, 1117919, 1117920, 1117921, 1117922, 1117934, 1117964, 19010125, 19010126, 19010127, 19010145, 19010168, 19010192, 19010202, 1214134, 3604668rx, 3675158rx, 3920616, 10459037, 10459050, 10459051, 10459336, 10459462, 321-688, 321688, 321-689, 321689, 101-21107, 101-21108, 90-01-4109n, 90014109n, Ca5175, Ca7679n, Ca7685n, Ca7686n, Ca8020n, Ca8021n, Ca8022n, Ca8023n, Ca8024n, Ca9175, 7679, 7685, 7686, 8020, 8021, 8022, 8023, 8024, M20154 ), ( Voltage: 12 V ), ( Manufacturer Warranty: 2 Years ), ( Performance Part: No ), ( Finish: Yes ), ( Note: 21si Ir/ef 160a 12v Cw Pulley Not Included ), ( Fitment Type: Direct Replacement )

Review OE QUALITY Alternator Freightliner Medium/ Heavy Duty Trucks Cw 12v 160a fits CUMMINS

The 1117921 alternator is a crucial component in the electrical system of Freightliner medium-duty trucks equipped with the Cummins CW 21SI 12V engine and a 160-amp output. This alternator is meticulously designed to ensure reliable and efficient power generation for various electrical systems in the vehicle.

This alternator boasts a robust construction, with a durable cast aluminum housing that effectively dissipates heat to maintain optimal operating temperatures. The pulley is designed with a heavy-duty, ribbed construction to handle the demands of heavy-duty applications. Additionally, the alternator features a high-output stator that can generate a maximum output of 160 amps at 2,000 RPM, providing ample power to keep the battery charged and electrical systems running smoothly.

The alternator also incorporates a diode rectifier system, which converts the alternating current (AC) generated by the alternator into direct current (DC) that can be used by the truck's electrical systems. This diode rectifier system ensures efficient power transfer and minimizes power loss.

Furthermore, the alternator is designed with a convenient automatic voltage regulator (AVR) that maintains the battery voltage at the optimal level, ensuring that the battery is neither overcharged nor undercharged. This feature helps prolong the life of the battery and ensures consistent performance.

The 1117921 alternator is also designed with a smooth-running, double-bearing system that reduces vibration and wear, ensuring a long service life. The alternator belt drive system features a serpentine belt design, which simplifies the belt routing and eliminates the need for multiple belts, reducing maintenance requirements.

In summary, the 1117921 alternator is a high-performance and reliable component that is essential for the electrical system of Freightliner medium-duty trucks with the Cummins CW 21SI 12V engine and a 160-amp output. With its robust construction, efficient power generation, and convenient design features, this alternator is an excellent choice for heavy-duty applications that require consistent and reliable electrical power.

The 1117921 alternator is a 12V, 160A component designed for Freightliner medium trucks with Cummins CW 21SI engines. Here are some potential pros and cons that might help you make an informed decision about purchasing this alternator:

1. OEM (Original Equipment Manufacturer) fit: This alternator is manufactured by Cummins, ensuring that it is specifically designed to fit and function properly in Freightliner trucks with Cummins CW 21SI engines.

2. High output: With a 160A rating, this alternator can efficiently charge the battery and power the electrical system of your truck, even under heavy load conditions.

3. Durable construction: Cummins is known for its robust and reliable components, which should translate to a long service life for this alternator.

1. Cost: As an OEM part, the 1117921 alternator may be more expensive than aftermarket alternatives. However, the increased cost can be justified by its specific fit and durability.

2. Availability: Depending on your location and the availability of parts suppliers, it might be more challenging to find this alternator compared to aftermarket options.

3. Installation: Installing an OEM alternator may require additional steps and tools compared to aftermarket alternatives due to its specific design and fit.

In conclusion, the 1117921 alternator offers the benefits of a reliable OEM part with a high output and durable construction. However, it may come at a higher cost and be less readily available than aftermarket alternatives. Ultimately, the decision to purchase this alternator depends on your priorities, such as the importance of a specific fit, the desired level of reliability, and your budget.

If you prioritize a reliable and specific fit, the 1117921 alternator is a recommended choice for your Freightliner medium truck with a Cummins CW 21SI engine. If budget is a concern, you may consider exploring aftermarket alternatives, but be aware that they might not provide the same level of fit and reliability.

Details:

Please compare carefully with Photos or OE number before purchasing the part. For Volvo Medium/Heavy Truck. Number of Pieces: With these parts you can replace your defective simply plug and play.

voltage : 12 V. For Mack Heavy Duty. Pulley Class: w/o. For Western Star HD Heavy Duty.

Fit For the Following model's. For Ken worth Medium/Heavy Truck.: Alternator. Regulator/Fan: IR/EF.

OEM Part Number. Condition: New. Unit Finish: Same as pictures. Product View Vehicle Information: Specifications.

Design / Type: 21SI. Rotation: CW. Amperage: 160. Mounting Hardware Included: No.

For Potability Heavy Duty.

part #: 1117921 prices

• $117.95-$156.69

specifications altnagen:

• for models: Cummins
• for makes: Freightliner
• brand: Oe Quality
• mpn: 1117921
• type: Alternator
• amperage: 160 A
• features: Clockwise Rotation
• oe/oem part number: 1117917, 1117919, 1117920, 1117921, 1117922, 1117934, 1117964, 19010125, 19010126, 19010127, 19010145, 19010168, 19010192, 19010202, 1214134, 3604668rx, 3675158rx, 3920616, 10459037, 10459050, 10459051, 10459336, 10459462, 321-688, 321688, 321-689, 321689, 101-21107, 101-21108, 90-01-4109n, 90014109n, Ca5175, Ca7679n, Ca7685n, Ca7686n, Ca8020n, Ca8021n, Ca8022n, Ca8023n, Ca8024n, Ca9175, 7679, 7685, 7686, 8020, 8021, 8022, 8023, 8024, M20154
• voltage: 12 V
• manufacturer warranty: 2 Years
• performance part: No
• finish: Yes
• note: 21si Ir/ef 160a 12v Cw Pulley Not Included
• fitment type: Direct Replacement

offer altnagen:

• started: September 16, 2025
• availability: In Stock
• quantity: 5
• sold: 0
• options: Ship-to-home
• best offers: True

shipping altnagen:

• class: Standard
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• type: Fixed
• transit: 3-7 Days

seller altnagen:

• city: Chino, California
• rating: 98.4%
• # reviews: 5284

payments altnagen:

• wallet: Paypal
• credit card: Mastercard
• other

general altnagen:

• condition: New
• Car Truck Parts Accessories > Starters, Alternators, ECUs Wiring > Alternators Generators

returns altnagen:

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

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