AISIN SX-3729 Rear Left Door Lock Body Kf

( Brand: Aisin ), ( Manufacturer Part Number: SX-3729 ), ( Type: Door Lock Assembly ), ( Placement On Vehicle: Body Doors ), ( Manufacturer Warranty: 1 Year / 12, 000 Miles ), ( Ipn: C429 19-28 ), ( Compatible Year: 2013 2012 2011 2010 2009 ), ( Core Charge: Free No Core Charge ), ( Position: Rear Left ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Aisin Door Lock Assembly )

Review AISIN Rear Left Door Lock Assembly Toyota Body Doors Kf fits COROLLA 2009–2013

The **Aisin SX-3729 Rear Left Door Lock** is a high-quality, direct-fit replacement part designed specifically for the **2009 2013 Toyota Corolla models** featuring the **KF body style**, ensuring seamless integration with the vehicle s original door mechanism. Crafted with precision engineering, this lock mechanism is built to deliver reliable performance, matching the durability and functionality of the factory component while offering enhanced longevity. The SX-3729 is constructed from robust, corrosion-resistant materials, including hardened steel and reinforced plastics, which resist wear, rust, and environmental degradation critical factors for maintaining smooth operation in varying climates. Its design incorporates a **self-adjusting latch system**, reducing friction and preventing premature failure, a common issue with aftermarket parts that lack proper tolerances. This lock is engineered to work flawlessly with the **KF-series door panel**, including the window regulator and weatherstripping, ensuring a tight seal and quiet operation. Whether replacing a worn-out original lock or upgrading due to a malfunction, this part is an ideal choice for DIY enthusiasts and professional mechanics alike, offering a perfect balance of affordability and performance. With its **universal compatibility** within the specified model range, the Aisin SX-3729 eliminates the need for custom modifications, providing a straightforward, hassle-free installation that restores both security and functionality to your vehicle s rear left door.

### Pros and Cons of buying a Aisin SX-3729 Rear Left Door Lock for a 2009-2013 Toyota Corolla (Body Doors, KF)

1. **Direct Fitment** The Aisin SX-3729 is specifically designed for the rear left door of the KF-generation Toyota Corolla (2009 2013). This ensures compatibility without the need for modifications, reducing installation hassles.

2. **Reliability** Aisin is a well-known manufacturer in the automotive industry, particularly for door lock mechanisms. Their components are often built to last, offering durable performance over time.

3. **Quality Construction** The part is likely made with materials that resist wear and corrosion, which is important for door locks that experience frequent use and exposure to the elements.

4. **Ease of Installation** Since it s a direct replacement, replacing the lock should be straightforward for someone with basic mechanical skills. The part should align properly with the existing wiring and mounting points.

5. **Warranty Coverage** Many aftermarket parts from reputable brands like Aisin come with warranties, providing some assurance against defects in materials or workmanship.

6. **Cost-Effective Alternative** Purchasing this part new (rather than salvaging from a junk yard) can be more economical than waiting for a donor vehicle, especially if you need it urgently.

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1. **Aftermarket vs. OEM Differences** While designed to fit, aftermarket parts may not feel or function *exactly* like the original equipment manufacturer (OEM) component. Some users report slight differences in smoothness or noise levels.

2. **Potential for Counterfeit Parts** Buying from untrusted sellers (e.g., unverified online marketplaces) increases the risk of receiving a counterfeit or low-quality knockoff. Always purchase from reputable suppliers.

3. **Wiring or Electrical Issues** If the original wiring harness is damaged or corroded, the new lock may not function properly even if the part itself is fine. Inspect the wiring during installation.

4. **Limited Availability of OEM Parts** If you later decide to use an OEM part (e.g., from a Toyota dealer), the aftermarket Aisin lock may not be interchangeable without additional adjustments.

5. **No Included Tools or Hardware** Unlike some kits, this part may not come with necessary tools (e.g., door panel removal tools) or hardware (e.g., new screws or clips), requiring you to source these separately.

6. **Mixed Reviews on Longevity** While Aisin parts are generally reliable, some users report that aftermarket door locks may wear out faster than OEM parts, especially if the vehicle is driven frequently or in harsh conditions.

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The **Aisin SX-3729 rear left door lock** is a solid choice for replacing a faulty or worn-out lock on your 2009 2013 Toyota Corolla. Its **direct fitment, durability, and ease of installation** make it a practical option for most DIYers. However, **quality varies by seller**, so prioritize purchasing from trusted sources to avoid counterfeit parts. If you re concerned about long-term reliability, consider pairing this with a thorough inspection of the wiring and surrounding components during installation.

- A **multimeter** to test wiring before installation.

- **Door panel removal tools** (if not included).

- **Lubricant** (e.g., silicone spray) for smoother operation post-installation.

If budget allows and you prefer OEM quality, sourcing an original Toyota part may be worth the higher cost, but the Aisin option strikes a good balance for most users.

**Recommendation:** Proceed with purchasing the **Aisin SX-3729** from a reputable seller (e.g., RockAuto, Amazon with verified reviews, or a local auto parts store). Follow installation instructions carefully, and test the lock thoroughly after fitting. If issues arise (e.g., sticking or electrical problems), double-check wiring and consider consulting a mechanic.

Details:

AISIN Rear Left Door Lock Assembly for 2009 - 2013 Toyota Corolla Body doors kf: Status: In Stock.

part #: sx3729 price

• $188.44

specifications carlockiio:

• for models: Corolla
• for makes: Toyota
• for years: 2009-2013
• brand: Aisin
• mpn: Sx-3729
• type: Door Lock Assembly
• placement on vehicle: Body Doors
• manufacturer warranty: 1 Year / 12, 000 Miles
• ipn: C429 19-28
• compatible year: 2013 2012 2011 2010 2009
• core charge: Free No Core Charge
• position: Rear Left
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Aisin Door Lock Assembly

general carlockiio:

• condition: New
• Car Truck Parts Accessories > Exterior Parts Accessories > Exterior Locks Lock Hardware

seller carlockiio:

• # reviews: 659686
• city: Indianapolis, Indiana
• rating: 99.6%

offer carlockiio:

• started: May 21, 2026
• sold: 0
• quantity: 2
• availability: In Stock
• options: Ship-to-home

returns carlockiio:

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

payments carlockiio:

• other
• wallet: Paypal
• credit card: Discover

shipping carlockiio:

• cost: $0.00
• type: Fixed
• service: Standard, Expedited
• transit: 5-7 Days
• class: Standard, Expedited

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