1. Lock Hardware Deals
  2. sku: 29608477946502853
  3. MAZDA CX-9

MAZDA 643.MZ1809 Left Rear Lock Actuator Wrnty 1YR

fits model: Cx-9. make: Mazda. year: 2009.

643.mz1809 Mazda Left Rear Lock Actuator Oem 2009 Cx-9 1yr Wrnty

( Part Type: Actuator Lock ), ( Conditions Options: Lh Rear Door Lock Actuator ), ( Genuine Oem: Yes ), ( Ipn: 643.mz1809 ), ( Manufacturer Warranty: 1 Year )

Review MAZDA Left Rear Lock Actuator Oem 1yr Wrnty fits CX-9 2009

The **Mazda 643.MZ1809 Left Rear Lock Actuator** is a precision-engineered component designed exclusively for the **2009 Mazda CX-9**, ensuring seamless operation of the rear door locking mechanism with reliability and durability. This high-quality actuator is part of Mazda s **MZ1809 series**, a specialized line of electrical components tailored to meet the exacting standards of the CX-9 s advanced keyless entry and remote locking system. Crafted from robust, corrosion-resistant materials, the actuator is built to withstand the rigors of daily use while maintaining smooth, silent engagement whether activated manually, via the remote, or through the vehicle s integrated keyless system. The design incorporates a **direct-drive motor** paired with a durable plastic or metal gear assembly, delivering consistent torque and precise positioning for both locking and unlocking functions. Compatible with the **2009 model year** and backed by a **one-year warranty**, this actuator is a direct-fit replacement for OEM failures, ensuring compatibility with the original wiring harness and mounting bracket without the need for additional modifications. Ideal for mechanics, DIY enthusiasts, or fleet operators seeking long-term reliability, this actuator eliminates common issues like slow response, intermittent locking, or complete failure, restoring full functionality to the rear doors with minimal effort. Its compact yet sturdy construction also aligns with Mazda s engineering philosophy, balancing performance with longevity to keep the CX-9 s security features operating at peak efficiency.

Buying a used **Mazda 643.mz1809 left rear lock actuator (2009 CX-9, 1-year warranty)** has both advantages and disadvantages. Below is a detailed breakdown:

### **Pros:**

1. **Cost-Effective Replacement** Purchasing a used or refurbished actuator is significantly cheaper than buying a new OEM part, saving you money upfront.

2. **Warranty Coverage** The inclusion of a **1-year warranty** provides some reassurance that the part will function as expected for at least a year, reducing long-term risk.

3. **Compatibility** The part is specifically listed for a **2009 Mazda CX-9**, ensuring a direct fit without modification.

4. **Quick Fix for Common Issue** Rear door lock actuators frequently fail due to wear, corrosion, or electrical issues, and replacing it can restore proper door function without needing a full door assembly swap.

5. **Potential for Resale Value** If the part is in good condition, it may retain some value if you decide to sell it later.

### **Cons:**

1. **Unknown Service History** Since the part is used, you cannot be certain about its prior usage, wear, or any past repairs. It may have hidden damage or reduced lifespan.

2. **Potential for Early Failure** Even with a warranty, a used part may fail sooner than a new one, leading to additional repair costs.

3. **No Original Manufacturer Support** Unlike a new OEM part, you won t have Mazda s full warranty or technical support if issues arise beyond the 1-year coverage.

4. **Risk of Incompatibility Issues** While the part is listed for your vehicle, slight variations in wiring, mounting, or electrical connections could cause problems if the seller did not properly test it.

5. **Limited Availability of Spare Parts** If the part fails again soon after purchase, sourcing a replacement may be more difficult than if you had bought new from the start.

### **Conclusion:**

Buying a used **Mazda 643.mz1809 rear lock actuator with a 1-year warranty** is a **cost-effective solution** for a quick fix, especially if you are on a tight budget. The warranty provides some protection, but the part s reliability depends on its prior condition. If you prioritize long-term durability and manufacturer-backed support, a new OEM or high-quality aftermarket part may be worth the higher cost.

### **Recommendation:**

- **Proceed with purchase** if you are confident in the seller s reputation, the part has been tested, and you are comfortable with the risk of early failure.

- **Consider a new OEM or aftermarket part** if budget allows, as it eliminates uncertainty and may last longer.

- **Inspect the part thoroughly** before installation check for corrosion, proper wiring, and smooth operation.

- **Document the purchase** and keep records in case warranty claims are needed.

Ultimately, the decision depends on your budget, risk tolerance, and how critical the door lock function is to your vehicle s usability. If this is a minor inconvenience, the used part with warranty may be a practical choice. If the door locks are essential for safety or security, a new part could be the safer option.

Details:

Very happy customer, excellent value and service. Warranty HASSLE-FREE 1 YEAR WARRANTY: All parts are warrantied for a period of 12 months or year from the purchase date. Easy to find parts that don't require a mechanics knowledge. Free shipping only applies to items you keep.

Shipping Damage:: Damages and evidence of tampering on the outer packaging must be noted delivery receipt by driver. Please compare part numbers BEFORE purchasing. More Parts: 1 Year Warranty. If something is wrong with an order, we certainly do want to help you.

Image shown may be the vehicle from which part was pulled, or a generic image representing typical stock, rather than unique item being sold. Please disregard other fitment charts they may not be correct. Quality, Assured Parts All are Quality Tested Inspected. Original is 8709090 Included: Hassle-free 1 Year Warranty Our Part #: 8709224.

LEFT REAR LOCK ACTUATOR OEM 2009 CX-9 1YR WRNTY: LH DOOR Unload at zone A 1 Dummy.

specifications carlockiio:

  • for models: Cx-9
  • for makes: Mazda
  • for years: 2009
  • part type: Actuator Lock
  • conditions options: Lh Rear Door Lock Actuator
  • genuine oem: Yes
  • ipn: 643.mz1809
  • manufacturer warranty: 1 Year

general carlockiio:

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

seller carlockiio:

  • city: Rancho Cordova, California
  • rating: 97.0%
  • # reviews: 22902

payments carlockiio:

  • wallet: Apple-pay
  • credit card: Diners-club
  • other

returns carlockiio:

  • time: 60 Days
  • paid by: Buyer
  • policy: Returns Accepted

shipping carlockiio:

  • class: Freight
  • cost: $20.00
  • service: Flat Rate Freight
  • type: Fixed

offer carlockiio:

  • availability: In Stock
  • started: February 10, 2026
  • sold: 0
  • best offers: True
  • quantity: 1
  • options: Ship-to-home
for models: cx-9, for makes: mazda, for years: 2009, part type: actuator lock, conditions options: lh rear door lock actuator, genuine oem: yes, manufacturer warranty: 1 year,
manufacturer: mazda, category: auto parts > car truck parts accessories > exterior parts accessories > exterior locks lock hardware, sku: 29608477946502853,
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