ACURA 643.AC1416 Lock Actuator

( Part Type: Actuator Lock ), ( Conditions Options: Lh Front Door Lock Actuator ), ( Genuine Oem: Yes ), ( Ipn: 643.ac1416 ), ( Manufacturer Warranty: 1 Year )

Review ACURA Lock Actuator fits MDX 2016

The **Acura MDX (2016) Lock Actuator (Part Number: 643.AC1416)** is a precision-engineered component designed to ensure seamless and reliable operation of the vehicle s central locking system. This high-quality actuator is specifically tailored to fit the 2016 Acura MDX, a luxury SUV known for its blend of performance, comfort, and advanced technology. The lock actuator functions as the mechanical interface between the driver s key fob or manual door lock lever and the door s locking mechanism, delivering smooth, silent engagement and disengagement of the door latches. Crafted from durable materials, including reinforced plastics and corrosion-resistant metals, this actuator is built to withstand the demands of daily use while maintaining long-term reliability. Its robust construction minimizes wear and tear, reducing the risk of premature failure, which is particularly important in vehicles that see frequent use or operate in varying environmental conditions. The actuator s design incorporates a precise gearing system that ensures consistent and repeatable performance, allowing for effortless locking and unlocking with minimal resistance. Whether activated via the key fob s remote control, the interior door handle, or the smart key system, this component delivers the responsiveness and precision drivers expect from an Acura. For owners or mechanics seeking to restore or upgrade their 2016 MDX s locking functionality, this actuator serves as an essential replacement part, ensuring that the vehicle s security and convenience features remain fully operational. Its compatibility with the MDX s integrated door lock system makes it a straightforward and effective solution for addressing issues related to malfunctioning locks, such as sticking mechanisms, delayed responses, or complete failure of the locking mechanism. By maintaining the integrity of the vehicle s locking system, this actuator contributes to the overall safety, security, and user experience of the Acura MDX.

### Pros and Cons of Buying a 2016 Acura MDX (VIN: 643AC1416) with a Lock Actuator Issue

#### **Pros**

1. **Reliable Base Platform** The Acura MDX is built on a solid foundation with a V6 engine (3.5L J35) and a proven 9-speed automatic transmission. The 2016 model is generally well-engineered, with fewer major reliability issues compared to some competitors.

2. **Comfortable and Spacious Interior** The MDX offers a comfortable ride, good sound insulation, and ample seating for five passengers. The cabin materials are decent for the price, and the layout is practical for both daily driving and family use.

3. **Good Safety Features** The 2016 MDX comes standard with Acura s **Vehicle Dynamic Control (VDC)**, **Traction Control**, **Stability Assist**, and **multiple airbags**. Optional safety tech like **Acura Watch** (backup camera) and **Adaptive Cruise Control** (on higher trims) adds value.

4. **Moderate Fuel Efficiency** The 3.5L V6 provides a balance between power and efficiency, averaging around **18-20 MPG in the city** and **24-26 MPG on the highway**, which is reasonable for a midsize SUV.

5. **Resale Value** Acura vehicles hold their value relatively well, and the MDX, in particular, retains a strong resale price compared to some domestic and luxury SUVs.

6. **Available Tech and Comfort Features** Depending on the trim, the 2016 MDX may include features like **Bluetooth, USB ports, leather seats, heated/ventilated front seats, a premium sound system, and a user-friendly infotainment system** (though some users report minor software glitches).

7. **AWD Capability** The MDX comes standard with **Acura s Super Handling All-Wheel Drive (SH-AWD)**, which provides good traction in various conditions, though it s not as advanced as some luxury AWD systems.

8. **Lower Maintenance Costs Than Luxury Brands** Compared to German or Japanese luxury SUVs, Acura s maintenance costs are typically more affordable, though they can still add up over time.

---

#### **Cons**

1. **Lock Actuator Issue (Primary Concern)**

- The **lock actuator failure** in this MDX is a known problem, particularly in models around this era. The actuator controls the central locking system, and if it fails, you may experience **intermittent locking/unlocking, remote key not working, or the doors refusing to lock/unlock**.

- While not a safety hazard in all cases, it can be **inconvenient and frustrating**, especially if it happens frequently.

- **Repair Cost:** Replacing the lock actuator typically ranges from **$150 $300** (parts labor), depending on the dealer or shop. Some owners report that the issue persists even after replacement, suggesting a potential design flaw.

2. **Infotainment System Limitations**

- The **touchscreen interface** can be slow and unresponsive at times, and the **navigation system** is basic compared to competitors.

- Apple CarPlay and Android Auto were not available in 2016 (they were introduced in later models), which may be a drawback if you rely on smartphone integration.

3. **Ride Quality Trade-offs**

- While the MDX is comfortable, it s not as plush as some luxury SUVs. The suspension can feel **stiff over rough roads**, and road noise is noticeable at higher speeds.

- The **tires and wheel setup** are adequate but not premium, leading to slightly less refined handling.

4. **Engine and Transmission Reliability**

- The **3.5L J35 V6** is generally reliable but can develop **oil leaks** (valve cover gasket, oil filter housing gasket) over time, requiring **preventative maintenance**.

- Some owners report **transmission hesitation or rough shifting**, particularly in the 9-speed automatic, though major failures are rare.

5. **Interior Build Quality Variances**

- While the MDX has a solid cabin, **plastic trim pieces can feel cheap** in some areas, and the **seats are comfortable but not as supportive as in higher-end SUVs**.

- The **sunroof (if equipped)** is functional but not as smooth or quiet as in some competitors.

6. **Fuel Economy Not Exceptional**

- The V6 s **MPG ratings are average for a midsize SUV**, and the **AWD system** can slightly reduce efficiency compared to FWD models.

7. **Depreciation Over Time**

- While Acura holds value well, the MDX has seen **strong competition from Toyota, Honda, and Lexus**, meaning its resale value may not appreciate as much as some luxury brands.

8. **Potential Hidden Issues**

- **Exhaust leaks** (common in some J35 engines).

- **Suspension wear** (struts, bushings).

- **Electrical gremlins** (window regulators, door locks).

- **Transmission fluid condition** (should be fresh and clean).

---

### **Conclusion**

The **2016 Acura MDX with a lock actuator issue** is a **mixed bag**. On one hand, it offers a **reliable engine, decent fuel economy, and a comfortable ride** all at a reasonable price compared to newer models. The **interior is functional, and safety features are solid**, making it a practical choice for daily driving.

However, the **lock actuator problem is a significant drawback**, especially if it s a recurring issue. While the repair itself is manageable, **frequent failures could be annoying**, and if the problem persists after replacement, it may indicate a broader electrical or mechanical flaw.

### **Recommendation**

- **Proceed with caution.** Get a **detailed inspection** to ensure no other hidden issues exist (e.g., exhaust leaks, transmission concerns).

- **Budget for the repair** ( $200 $300) and consider whether the convenience of a working lock system is worth the cost.

- If the vehicle has **low mileage (under 60,000 miles) and good maintenance records**, it could be a **solid buy**.

- **Look for another MDX with a clean service history** or consider a **different year** (e.g., 2017 2019, which may have fewer actuator issues).

- **Negotiate the price** based on the known issue, aiming for **$1,500 $2,500 below market value** depending on severity.

- If you re open to similar SUVs, consider a **2016 2017 Honda Pilot, Toyota Highlander, or Lexus RX** these may have better long-term reliability and fewer electrical quirks.

- If you **must have an Acura**, look for a **2017 MDX**, as later models improved on some of the earlier issues.

- The issue is **isolated and repairable** without major underlying problems.

- You **prioritize value, space, and reliability** over luxury features.

- You re **willing to budget for the repair** and have it inspected thoroughly.

- The lock actuator has **failed repeatedly** or is part of a larger electrical system issue.

- You find a **better-priced alternative** with a cleaner history.

- You re uncomfortable with **potential future repairs** (e.g., oil leaks, transmission concerns).

- **Get a PPI** from a trusted mechanic.

- **Test drive the vehicle** to confirm the lock actuator works properly.

- **Compare with similar SUVs** to ensure you re getting the best deal.

- **Factor in the repair cost** into your budget before purchasing.

Would you like guidance on where to find a reputable mechanic for inspection or how to negotiate the price?

Details:

Very happy customer, excellent value and service. Quality, Assured Parts All are Quality Tested Inspected. Image shown may be the vehicle from which part was pulled, or a generic image representing typical stock, rather than unique item being sold. Easy to find parts that don't require a mechanics knowledge.

Warranty HASSLE-FREE 1 YEAR WARRANTY: All parts are warrantied for a period of 12 months or year from the purchase date. Shipping Damage:: Damages and evidence of tampering on the outer packaging must be noted delivery receipt by driver. Please compare part numbers BEFORE purchasing. Free shipping only applies to items you keep.

Please disregard other fitment charts they may not be correct. If something is wrong with an order, we certainly do want to help you. More Parts: 1 Year Warranty. MDX 2016 Lock Actuator 12114463: LH FRONT DOOR LOCK ACTUATOR Included: Hassle-free 1 Year Warranty Our Part #: 12114463.

part #: 643.ac1416 prices

• $59.49-$125.00

specifications carlockiio:

• for models: Mdx
• for makes: Acura
• for years: 2016
• part type: Actuator Lock
• conditions options: Lh Front Door Lock Actuator
• genuine oem: Yes
• ipn: 643.ac1416
• manufacturer warranty: 1 Year

seller carlockiio:

• city: Rancho Cordova, California
• # reviews: 23653
• rating: 97.4%

shipping carlockiio:

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

payments carlockiio:

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

returns carlockiio:

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

offer carlockiio:

• options: Ship-to-home
• availability: In Stock
• best offers: True
• quantity: 1
• sold: 0
• started: May 28, 2026

general carlockiio:

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

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