A Lexus Owner's Guide to the 2006-2016 IS350 Door Lock Actuator
If your IS350 door locks are acting up, you're not alone—here's what you need to know before you buy a replacement.
- This is a very common failure; when one actuator fails, the others often follow.
- Verify you are buying the correct part for your specific door (e.g., Front Left, Rear Right), as they are not interchangeable.
- A DIY replacement is very achievable and can save you hundreds of dollars compared to a dealer repair.
- There is no recall for this issue, so repair costs will be out-of-pocket unless covered by a warranty.
Is Your Lexus IS350 Door Lock Actuator Failing?
Failure of the door lock actuator is a very common problem for 2006-2016 Lexus IS350 owners. The issue usually isn't if it will fail, but when. Often, once one door actuator fails, the others will follow in a similar timeframe. The symptoms are hard to miss and can range from a minor annoyance to a security concern.
Common Symptoms of a Bad Actuator:
- Doors Won't Lock or Unlock Electronically: The most obvious sign is when one or more doors don't respond to the key fob or the interior power lock switch. You may have to use the physical key or manually flip the lock.
- Grinding or Buzzing Noises: You might hear a distinct buzzing or grinding sound from inside the door when you try to use the power locks. This is the sound of the small internal motor trying to work but failing.
- Intermittent Operation: The locks might work sometimes but not others. This can be affected by temperature, often failing in the cold and working again when it's warmer.
- "Door Ajar" Light Stays On: The sensor in the latch assembly can fail, making the car think a door is open when it's shut. This can prevent the doors from locking and may drain your battery by keeping interior lights on.
- Random Car Alarm: A faulty actuator can sometimes trigger the car's security alarm randomly.
No Official Recall, But It's a Known Issue
As of early 2026, there are no official safety recalls or Technical Service Bulletins (TSBs) from Lexus or the NHTSA for failing door lock actuators on the IS350. The problem is generally considered a standard wear-and-tear repair. However, the issue is so widespread across many Lexus models that a class-action lawsuit has been organized to address the defect, which includes the 2014-2016 IS models.
Choosing the Right Aftermarket Door Lock Actuator
When your actuator fails, you have a few options. Going to a Lexus dealer is the most expensive route, with costs potentially exceeding $600 for a single door. Aftermarket parts offer a much more affordable solution.
Brand Quality & Cost Tiers
- Premium Aftermarket (e.g., AISIN): Brands like AISIN are often original equipment (OE) suppliers for Toyota and Lexus. Choosing a part from an OE supplier is the closest you can get to dealer quality without the dealer price tag. These are highly recommended by owners in forums for their reliability.
- Standard Aftermarket (e.g., Standard Ignition, URO Parts): Brands like Standard Ignition (SMP) and URO Parts provide a balance of cost and quality. They are designed to be direct-fit replacements and often come with a good warranty, like URO's 24-month warranty. These are solid choices for a reliable repair without the premium cost.
- Value-Priced Options (e.g., Replacement): These are the most budget-friendly parts. While they meet fitment and function requirements, their long-term durability can sometimes be a concern compared to more established brands. They can be a good option if minimizing cost is your top priority.
Pro Tip: Replacing the Motor Only
For the advanced DIYer, it's possible to open the sealed actuator assembly and replace only the small electric motor inside. These motors can be found online for under $20. This is the cheapest fix but requires carefully cutting the plastic housing open and then sealing it back up.
🎬 See how to repair the internal motor for under $10.Cost to Replace a Lexus IS350 Door Lock Actuator
| Part/Service | Estimated Cost |
|---|---|
| New OEM Part | $380 - $526 |
| New Aftermarket Part | $52 - $323 |
| Shop Labor | $110 - $161 |
| Total Dealer Replacement | $600 - $1,100+ |
| Total Independent Shop (Aftermarket Part) | $162 - $484 |
Frequently Asked Questions
Is it hard to replace the door lock actuator myself?
It is a manageable DIY job for someone with basic tools, but it requires patience. The process involves removing the interior door panel, peeling back the weather barrier, and working in a tight space to unbolt the actuator and disconnect its cables and rods. 🎬 Check out these expert tips for handling tricky door cables. Several video guides are available online that walk through the process.
🎬 Watch this step-by-step guide for replacing the IS350 actuator.Do I need to replace all the actuators at once?
You only need to replace the one that has failed. However, it is very common for the other door actuators to fail soon after the first one does. If you're already taking one door apart, you might consider doing others that are acting up intermittently.
Could a blown fuse be the problem?
It's unlikely. The power door lock system typically uses one fuse for all the doors. If a fuse were blown, all of your power locks would stop working at the same time, not just one.
How do I make sure I order the correct part?
Each door on the car—front driver, front passenger, rear driver, and rear passenger—uses a different, unique part number. It is critical to verify you are ordering the actuator for the specific door position you need to repair.
Helpful Videos
Technical Specifications
OEM Part Numbers: 69040-53130 69030-53120
The part is a complete door latch and lock actuator assembly. Each door position (Front Right, Front Left, Rear Right, Rear Left) uses a unique part number. The assembly is secured with three T30 Torx bolts.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Lexus IS350:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Lexus IS350 Door Lock Actuator Failing?
- Common Symptoms of a Bad Actuator:
- No Official Recall, But It's a Known Issue
- Choosing the Right Aftermarket Door Lock Actuator
- Brand Quality & Cost Tiers
- Pro Tip: Replacing the Motor Only
- Cost to Replace a Lexus IS350 Door Lock Actuator
- Frequently Asked Questions
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