DORMAN 977-564 Throttle Body TB1117

( Brand: Dorman ), ( Manufacturer Part Number: 977-564 ), ( Part Type: Throttle ), ( Ipn: Tb1117 ), ( Compatibility: 2005 Bmw 330ci Base Convertible 2-door 3.0l 2979cc L6 Gas Dohc Na ), ( Epid: 25038213050 )

Review DORMAN Electronic Throttle Body Assembly

The **Dorman 977-564 Throttle Body** is a high-quality, direct-fit replacement designed to restore optimal performance and reliability to engines equipped with the original GM 977-series throttle body, commonly found in a variety of General Motors vehicles, including select Chevrolet, GMC, and Pontiac models from the late 1990s through the early 2000s. Engineered to meet or exceed OEM specifications, this throttle body is crafted from durable materials, ensuring long-lasting durability under demanding driving conditions. The unit features a precision-machined throttle plate assembly, which operates smoothly to regulate airflow into the engine, promoting efficient combustion and improved throttle response. Its robust construction includes a sturdy throttle cable bracket and a reliable idle control valve system, both of which contribute to consistent engine idling and seamless acceleration. Whether you're restoring a classic vehicle or maintaining a modern performance application, this throttle body is built to deliver dependable performance, helping to eliminate issues like rough idling, stalling, or erratic throttle behavior. With its direct-fit design, it installs easily without the need for modifications, making it an ideal choice for DIY enthusiasts and professional mechanics alike. Trusted for its compatibility and performance, the Dorman 977-564 Throttle Body is a reliable upgrade for anyone seeking to enhance or restore the functionality of their engine s intake system.

### Pros and Cons of buying a Dorman 977-564 Throttle Body

1. **Compatibility and Fitment** The Dorman 977-564 is designed as an exact replacement for the stock throttle body found in many General Motors vehicles, particularly those from the late 1990s and early 2000s (e.g., some Chevrolet, Pontiac, and Saturn models). This ensures a direct fit without the need for modifications.

2. **Reliability and Durability** Dorman is a well-known brand under the Carter brand, which has a long history of producing high-quality aftermarket automotive parts. This throttle body is built to last, with sturdy materials and a robust construction that can withstand regular use.

3. **Performance Benefits** While not a high-performance part, this throttle body is designed to function efficiently, reducing issues like stalling, rough idling, or hesitation that can occur with worn or failing stock throttle bodies. It also helps maintain proper airflow, which can improve overall engine responsiveness.

4. **Ease of Installation** Since it is a direct replacement, installation is straightforward for most mechanics or even DIY enthusiasts with basic tools. No major modifications to the intake or wiring are typically required, making it a convenient upgrade.

5. **Cost-Effective Solution** Compared to rebuilding or replacing a severely worn stock throttle body, the Dorman 977-564 is often a more affordable option. It provides a fresh, reliable component without the hassle of sourcing rare OEM parts.

6. **Warranty Coverage** Dorman parts usually come with a warranty, offering some level of protection against defects in materials or workmanship. This can provide peace of mind, especially if the throttle body fails prematurely.

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1. **Limited Performance Gains** This throttle body is not a performance part. It is designed to replace a failing stock unit rather than enhance engine power or throttle response. If you're looking for a high-flow throttle body for forced induction or significant power gains, this is not the right choice.

2. **Potential Compatibility Issues** While the Dorman 977-564 fits many GM vehicles, there may be slight variations in wiring harnesses, mounting brackets, or throttle position sensor (TPS) compatibility depending on the specific year and model. Always verify fitment before purchasing, as incorrect installation could lead to further issues.

3. **No Upgrades to Modern Features** Unlike some newer throttle bodies, this part may not include modern features such as drive-by-wire compatibility or advanced calibration options. If your vehicle requires a more advanced throttle body for electronic throttle control (ETC), this may not be suitable.

4. **Quality Variations** While Dorman is generally reliable, there have been occasional reports of inconsistent quality in some batches. This is rare but worth noting, especially if purchasing from a third-party seller. Buying from a reputable auto parts store or directly from Dorman s website can mitigate this risk.

5. **No Throttle Body Deletion (TBD) Compatibility** If you're considering a throttle body deletion for a more aggressive setup (e.g., with a standalone ECU or fuel injection system), this part is not designed for that purpose. It will not work in a TBD setup without additional modifications.

6. **Potential for Throttle Sticking** As with any throttle body, carbon buildup or debris can cause the throttle plates to stick over time. While this part is durable, regular maintenance (such as cleaning the throttle body) is necessary to prevent issues, especially in high-mileage vehicles.

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The Dorman 977-564 throttle body is a solid, cost-effective replacement for a failing stock throttle body in compatible GM vehicles. It offers reliability, ease of installation, and improved engine performance in terms of smooth operation and reduced stalling. However, it is not a performance part and lacks advanced features found in newer throttle bodies. It is best suited for drivers looking to restore their vehicle s stock functionality rather than modify or enhance performance.

If your primary goal is to replace a worn throttle body and you ve confirmed fitment for your specific vehicle, this part is a practical and affordable choice. However, if you re pursuing performance modifications, forced induction, or a throttle body deletion, you may need to explore other options.

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- Your vehicle s stock throttle body is failing (e.g., stalling, rough idling, or hesitation).

- You ve verified that it is the correct part for your specific year, make, and model.

- You want a direct replacement that is easy to install and reliable.

- You re not pursuing aggressive performance modifications.

- You re looking for a high-performance throttle body (consider aftermarket parts like Holley, Edelbrock, or Weber).

- Your vehicle requires a throttle body deletion or a more advanced electronic throttle control system.

- You suspect compatibility issues (double-check wiring, mounting, and sensor fitment).

- You re purchasing from an unverified seller, as quality may vary.

For the best results, pair this purchase with regular maintenance, such as cleaning the throttle body periodically to prevent carbon buildup. If in doubt about fitment, consult a mechanic or refer to the vehicle s service manual.

Details:

Engineered with a factory-like design for effortless installation, ensuring perfect match your vehicle. Made of high-quality components for durability, reliability, and performance. Designed specifically for trucks, trailers, and buses. Dorman 977-564 Electronic Throttle Body Assembly: Part Number: Manufacturer.

Manufactured following strict OE standards to work like the original component. Engineered using the latest technology to ensure product lasts longer in service.

part #: 977564 prices

• $341.66-$414.32

specifications carfuelinjector:

• brand: Dorman
• mpn: 977-564
• part type: Throttle
• ipn: Tb1117
• compatibility: 2005 Bmw 330ci Base Convertible 2-door 3.0l 2979cc L6 Gas Dohc Na
• epid: 25038213050

general carfuelinjector:

• condition: New
• Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors

seller carfuelinjector:

• rating: 99.4%
• city: Los Angeles, California
• # reviews: 70026

payments carfuelinjector:

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

returns carfuelinjector:

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

offer carfuelinjector:

• quantity: 4
• availability: In Stock
• started: May 9, 2026
• sold: 0
• best offers: True
• options: Ship-to-home

shipping carfuelinjector:

• type: Fixed
• service: Standard
• class: Standard
• transit: 5-8 Days
• cost: $0.00

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