SATURN 400-00551 Automatic Transmission Kwifj 158K

( Part Type: Transmission ), ( Ipn: 400-00551 ), ( Fitment Type: Direct Replacement ), ( Modified Item: No ), ( Manufacturer Warranty: Unspecified Length )

Review SATURN Automatic Transmission Assembly 158k Kwifj fits VUE 2008

The **Saturn 400-00551 2008-2008 Vue Automatic Transmission Control Module (TCM), also known as the KWIFJ unit**, is a critical electronic component designed to regulate and optimize the performance of the vehicle s automatic transmission system. This high-quality, factory-original transmission control module is engineered specifically for Saturn Vue models produced in the 2008 model year, ensuring seamless compatibility with the vehicle s powertrain architecture. The TCM serves as the brain of the transmission, interfacing with various sensors such as the vehicle speed sensor, throttle position sensor, and transmission fluid temperature sensor to calculate optimal shift points, torque conversion, and overall drivetrain efficiency. Built with robust circuitry and precision calibration, this module supports the **4T65E automatic transmission**, a four-speed unit known for its smooth shifting and durability, which was standard in the 2008 Vue lineup. Whether addressing transmission hesitation, erratic shifting, or diagnostic trouble codes (DTCs) like P0700, P0740, or P0750, this TCM provides the reliability needed to restore proper transmission function. Its compact yet sophisticated design ensures compatibility with the vehicle s OBD-II system, allowing for seamless integration with modern diagnostic tools while maintaining the original performance characteristics intended by Saturn s engineering team. For enthusiasts and mechanics alike, this transmission control module represents a direct replacement solution, offering the same level of precision and reliability as the original equipment, thereby extending the lifespan of the transmission and enhancing the driving experience.

### **Pros and Cons of Buying a 2008 Saturn Vue (400-00551) with a 6-Speed Automatic Transmission (KWIFJ)**

#### **Pros**

1. **Affordability** The 2008 Saturn Vue is a budget-friendly compact SUV, making it an attractive option for buyers looking for reliable transportation without a high price tag.

2. **Fuel Efficiency** The 2.5L 4-cylinder engine paired with the 6-speed automatic transmission offers decent fuel economy, averaging around **19-22 MPG in the city and 26-29 MPG on the highway**, depending on the trim.

3. **Basic Reliability** Saturn vehicles from this era were designed to be practical and durable for everyday use. Many owners report that with proper maintenance, the transmission and engine hold up well for moderate mileage.

4. **Simple Maintenance** The automatic transmission is a standard **6-speed GM 6T30/6T40**, which is relatively straightforward to service compared to more complex modern transmissions. Fluid changes and basic upkeep are manageable for DIYers.

5. **Compact Size** The Vue is smaller than many SUVs, making it easier to park and maneuver in urban areas. It also has decent cargo space for its class.

6. **Available Safety Features** Some trims include **stability control, anti-lock brakes, and side curtain airbags**, which were standard or optional in 2008, providing better safety than older models.

7. **Parts Availability** As a GM product, parts for the Vue are widely available, and labor costs are generally reasonable compared to luxury or specialty brands.

8. **Potential for Modifications** The Vue s simplicity allows for easy modifications, such as engine swaps (e.g., LS engines), suspension upgrades, or performance tuning for better handling.

---

#### **Cons**

1. **Poor Resale Value** Saturn s brand reputation suffered in the late 2000s, and the Vue does not hold its value well. Buyers should expect a low resale price if they decide to sell later.

2. **Transmission Issues (Potential)** While the **6T30/6T40 transmission** is generally reliable, some owners report **rough shifting, delayed engagement, or failure** especially if maintenance was neglected. A pre-purchase inspection is crucial.

3. **Rust Concerns** Many 2008 Saturns (and GM vehicles from this era) suffer from **frame and undercarriage rust**, particularly in snowy or salted regions. A thorough inspection of the chassis is essential.

4. **Outdated Tech & Comfort** The Vue lacks modern features like **Apple CarPlay, Android Auto, or advanced driver aids**. The interior materials are basic, and the ride can be stiff compared to newer SUVs.

5. **Reliability of the 2.5L Engine** The **2.5L 4-cylinder (L61)** is known for **oil consumption issues, timing chain wear, and potential head gasket problems** especially if the vehicle has high mileage. Regular oil changes and maintenance are a must.

6. **Discontinued Support** Saturn was discontinued in 2010, meaning **official dealer support is limited**. Buyers may need to rely on independent mechanics or GM dealers for repairs.

7. **Infotainment Limitations** The radio system is basic, with no Bluetooth, USB ports, or modern connectivity options. Navigation, if available, is often outdated.

8. **Recall & Safety History** The 2008 Vue has had **recalls for airbag, brake, and transmission issues**. Checking the **NHTSA recall database** is important before purchasing.

---

### **Ending Conclusion**

The **2008 Saturn Vue (400-00551) with a 6-speed automatic transmission** can be a **good budget-friendly SUV** for buyers who prioritize **affordability, simplicity, and basic reliability**. However, it comes with **significant drawbacks**, particularly regarding **rust, transmission longevity, outdated tech, and poor resale value**.

- **Budget-conscious buyers** who need a reliable daily driver.

- **DIY mechanics** comfortable with maintenance and potential repairs.

- **Owners in mild climates** where rust is less of a concern.

- **Those who plan to keep the vehicle for a short term** (3-5 years) and don t rely on high resale value.

If you find a **well-maintained example with low miles (under 100,000), no rust, and a clean service history**, it could be a **decent purchase**. However, if you can afford a **newer used SUV (2010 ) or a different brand with better reliability**, those options may be more worthwhile long-term.

---

### **Final Recommendation**

You ve **inspected the vehicle thoroughly** (check for rust, transmission smoothness, engine condition).

You re **prepared for potential repairs** (transmission, engine, or rust-related).

You **don t need modern tech** and are okay with a basic interior.

You **plan to keep it for a short period** and aren t concerned about resale value.

You **need a long-term vehicle** with strong reliability.

You **live in a harsh climate** (snow, salt, or heavy rain increases rust risk).

You **expect high fuel efficiency or low maintenance costs** without proper upkeep.

You **prioritize safety features** beyond basic airbags and stability control.

- **2010 Chevrolet HHR or Equinox** (better reliability, slightly improved tech).

- **2009 Ford Escape or Mazda Tribute** (more durable, better resale).

- **2011 Toyota RAV4 or Honda CR-V** (if budget allows, far superior long-term value).

If you proceed with the Saturn Vue, **get a pre-purchase inspection, check maintenance records, and budget for potential repairs** to ensure a smooth ownership experience.

Details:

Please also use the pictures to ensure a proper fit. Most electronic parts are not plug and play. To aid in installation, you get to keep your current transmission and all attached accessories. VUE 08 AT; Red Line, FWD opt MH2, from 10/08/08.

Compatible with: VUE 08 AT; XR, FWD opt MH2, from 10/08/08. This 2008 Saturn VUE Automatic Transmission 158K Miles is in overall good condition.

specifications autotransmissionsgo:

• for models: Vue
• for makes: Saturn
• for years: 2008
• part type: Transmission
• ipn: 400-00551
• fitment type: Direct Replacement
• modified item: No
• manufacturer warranty: Unspecified Length

payments autotransmissionsgo:

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

seller autotransmissionsgo:

• city: Las Vegas, Nevada
• # reviews: 76167
• rating: 99.1%

offer autotransmissionsgo:

• quantity: 1
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 17, 2026

returns autotransmissionsgo:

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

shipping autotransmissionsgo:

• class: Freight
• service: Flat Rate Freight
• type: Fixed
• cost: $0.00

general autotransmissionsgo:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

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