1. Sway Bars Suspension Steering For Sale
  2. sku: 14739577622327751
  3. INFINITI 477-58744

INFINITI 477-58744 Crossmember Frame Rear Crossmember/k Q45

fits make: Infiniti. year: 1997–2001.

477-58744 Infiniti Crossmember/k-frame Rear Fits 97-01 Q45 280627

( Part Type: Frame ), ( Conditions Options: Rear ), ( Genuine Oem: Yes ), ( Ipn: 477-58744 ), ( Manufacturer Warranty: 90 Day )

Review INFINITI Crossmember/k-frame Rear Q45 fits 1997–2001

The **Infiniti Q45 (1997 2001) Rear Crossmember/K-Frame Assembly (Part # 477-58744)** is a critical structural component designed to reinforce the rear suspension and chassis integrity of this iconic luxury sedan. Manufactured to Infiniti s exacting standards, this crossmember serves as the backbone of the rear axle assembly, ensuring precise alignment of the rear subframe, differential housing, and suspension linkages while absorbing road-induced stresses. Crafted from high-strength steel, it is engineered to withstand the demands of daily driving, high-speed stability, and the vehicle s sport-tuned handling characteristics, which were hallmarks of the Q45 s performance-oriented design. The crossmember features precision-machined mounting points for the rear suspension arms, sway bar, and differential carrier, allowing for optimal clearance and alignment with the surrounding components. Its robust construction minimizes flex and torsional deformation, contributing to the Q45 s balanced ride quality and responsive steering feedback. Whether replacing a damaged or worn part due to an accident, excessive wear, or routine maintenance, this genuine OEM component ensures a seamless fit and the same level of durability as the original, making it an essential upgrade for enthusiasts seeking to restore or enhance their vehicle s structural integrity and performance. Proper installation requires careful alignment with the rear subframe and suspension components, often necessitating the use of specialized tools and torque specifications to maintain the Q45 s precise engineering tolerances.

### **Pros and Cons of Buying an Infiniti I30 (Q45) Crossmember/K-Frame Rear (1997 2001) Part #58744**

#### **Pros**

1. **Reliability and Durability** The Infiniti I30 (Q45) is a well-built vehicle with a robust frame and suspension components. The crossmember/k-frame rear assembly is a critical structural part, and replacing it with an OEM or high-quality aftermarket part ensures long-term stability, especially if the original was damaged in an accident.

2. **Improved Safety** A damaged or worn crossmember/k-frame can compromise the structural integrity of the vehicle, increasing the risk of further damage in a collision. Replacing it restores the car s safety cage, protecting passengers in future impacts.

3. **Prevents Further Damage** If the original part was bent or cracked (common in rear-end collisions), leaving it unrepaired can lead to misalignment, suspension issues, or even frame distortion over time. Replacing it prevents secondary damage to other components like the rear subframe, exhaust, or brake lines.

4. **OEM Quality (If Purchasing New)** If you opt for an **OEM Infiniti part (58744)**, you re getting a factory-spec component designed for the Q45 s specific frame rails and mounting points. This ensures a perfect fit and long-lasting performance.

5. **Aftermarket Options Available** If OEM is unavailable or too expensive, high-quality aftermarket brands (such as **EcuRevs, ACDelco, or Mann Filter**) offer compatible replacements that meet or exceed OEM standards in terms of strength and fit.

6. **Potential for Increased Resale Value** If the vehicle has a clean title and the repair is documented, it may be more appealing to buyers who prioritize structural integrity.

7. **DIY Feasibility** While the job requires some mechanical skill, the replacement is manageable for experienced DIYers with the right tools (torque wrench, jack stands, frame alignment equipment). Many online guides and videos can assist.

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#### **Cons**

1. **Cost**

- **OEM Part (58744)**: Typically ranges from **$300 $600**, depending on availability and supplier.

- **Aftermarket Part**: Usually **$150 $350**, but quality varies.

- **Labor**: If not doing it yourself, labor costs (especially in a shop specializing in frame work) can add **$500 $1,200 **, depending on location and complexity.

- **Additional Work**: If the frame is misaligned or rusted, extra labor may be needed for **frame straightening or welding**, increasing costs.

2. **Time and Effort**

- The job requires **disassembling the rear suspension, exhaust, and possibly the fuel tank** (if applicable).

- **Torque specifications must be strictly followed** to avoid over-tightening and damaging threads.

- **Frame alignment** may be necessary post-installation to ensure proper wheel alignment and handling.

3. **Rust and Frame Condition**

- Many older Q45s (especially those from snowy climates) suffer from **frame rust**. If the crossmember/k-frame has significant corrosion, it may require **welding or replacement of adjacent sections**, adding to the cost.

- A **frame inspection by a professional** is recommended before purchasing the part to assess overall structural health.

4. **Limited Availability of OEM Parts**

- Infiniti has **discontinued production** of many Q45 parts, making OEM replacements harder to find. Some suppliers may charge premium prices for rare items.

- **Check with multiple sources** (eBay, JATCO, Infiniti dealers, or part specialists like **RockAuto, 1A Auto**) before committing.

5. **Potential for Counterfeit Parts**

- If buying from unverified sellers, there s a risk of receiving **fake or low-quality aftermarket parts**. Always verify the seller s reputation and request **pictures/videos of the part before purchase**.

6. **Alignment and Handling Issues Post-Repair**

- Even with a new part, **proper alignment is critical**. If not done correctly, the vehicle may pull to one side, have uneven tire wear, or exhibit poor handling.

- Some owners report **minor rattles or misalignment** after DIY installation, requiring adjustments.

7. **Warranty and Recalls**

- If the vehicle is **not in your name**, some shops may hesitate to provide labor warranties.

- **Check for open recalls** on the Q45, as some frame-related issues were addressed in service campaigns.

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### **Conclusion**

Buying and installing a **new crossmember/k-frame rear (58744) for your 1997 2001 Infiniti I30 (Q45)** is a **necessary repair for safety and structural integrity**, especially if the original was damaged. The decision hinges on **budget, DIY skill level, and the overall condition of the frame**.

- **If the frame is otherwise sound and you re confident in your mechanical abilities**, an aftermarket or OEM replacement is a **wise investment** to prevent further damage and ensure safety.

- **If the frame has extensive rust or misalignment**, factor in additional costs for **welding, straightening, or professional alignment**.

- **If labor costs are prohibitive**, consider **learning the process** or seeking a **trusted mechanic** who specializes in frame work.

### **Recommendation**

1. **Inspect the Frame Thoroughly** Before purchasing the part, have a **frame inspection** done by a **collision repair specialist** to check for rust, bends, or distortion. If the frame is compromised beyond the crossmember, a **full frame repair may be needed**.

2. **Prioritize OEM or High-Quality Aftermarket**

- If possible, **buy the OEM part (58744)** from a reputable supplier (e.g., **JATCO, Infiniti Parts Direct, or a trusted online dealer**).

- If OEM is unavailable, **choose a well-reviewed aftermarket brand** (e.g., **EcuRevs, ACDelco, or Mann Filter**) that specifies compatibility with the Q45.

3. **Budget for Additional Costs**

- Account for **labor (if outsourcing)**, **alignment**, and **potential rust repairs**.

- Set aside **$800 $2,000** for a full, professional repair if the frame is in poor condition.

4. **DIY with Caution**

- If attempting the repair yourself, **follow torque specs strictly**, **use proper jacking points**, and **consider renting a frame alignment machine** if needed.

- **Document the process** and **verify alignment post-installation** to avoid handling issues.

5. **Consider Professional Help for Complex Cases**

- If the frame has **significant rust or misalignment**, a **specialized frame shop** may be worth the cost for a **long-term, safe repair**.

### **Final Verdict**

**Worth it if:**

The original part is **damaged or worn**.

You **prioritize safety and structural integrity**.

You re **prepared for the cost and effort** (either DIY or professional).

**Not worth it if:**

The frame is **beyond repair** (extensive rust, major distortion).

You **can t afford the full repair scope** (including alignment and potential welding).

You **lack the mechanical skill** to install it correctly.

**Best Approach:**

- **Get a professional frame inspection first.**

- **Buy the part from a trusted source.**

- **Proceed with repair (DIY or professional) based on your assessment.**

This repair will **extend the life of your Q45**, improve safety, and prevent future mechanical issues tied to frame instability.

Details:

Crossmember/K-Frame Rear Fits 97-01 INFINITI Q45 280627 This is in overall good condition. This part attaches to the suspension of vehicle. The crossmember will come complete without accessories. No expedited shipping options are available at this time.

217 Speedway Rd, Geffen, SC 29340. All mounting brackets are in good condition and usable.

part #: 477-58744 prices

  • $90.00-$474.90

specifications swabasus:

  • for makes: Infiniti
  • for years: 1997-2001
  • part type: Frame
  • conditions options: Rear
  • genuine oem: Yes
  • ipn: 477-58744
  • manufacturer warranty: 90 Day

offer swabasus:

  • started: March 3, 2026
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • best offers: True
  • quantity: 1

shipping swabasus:

  • class: Standard, One-day, Expedited
  • type: Fixed
  • service: Standard, Overnight, UPS 2nd Day Air
  • cost: $0.00
  • transit: 3-7 Days
  • carrier: UPS

seller swabasus:

  • rating: 98.9%
  • city: Gaffney, South Carolina
  • # reviews: 4548

payments swabasus:

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

general swabasus:

  • Car Truck Parts Accessories > Steering Suspension > Control Arms, Ball Joints Assemblies
  • condition: Used

returns swabasus:

  • paid by: Buyer
  • time: 30 Days
  • policy: Returns Accepted
for makes: infiniti, for years: 1997-2001, part type: frame, conditions options: rear, genuine oem: yes, manufacturer warranty: 90 day,
manufacturer: infiniti, category: auto parts > car truck parts accessories > steering suspension > control arms, ball joints assemblies, sku: 14739577622327751,
Infiniti 280627 Is Similar To:
swabasus logo
3 offers $90.00–$474.90 USD
  • Used. Offer #1 priced at $469.19 + $0.00 shipping estimate = $469.19* total. All mounting brackets are in good condition and usable This part attaches to the suspension of the vehicle.FREE SHIPPING
  • Used. Offer #2 priced at $474.90 + $0.00 shipping estimate = $474.90* total. INFINITI Q45 01 Rear; INFINITI Q45 97-99 Rear;.FREE SHIPPING
  • Used. Offer #3 priced at $90.00 + $Calculated shipping estimate = $90.00* total. +$Calculated shipping

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