When it comes to maintaining the functionality of a BMW’s rear tailgate, the lock actuator plays a pivotal role in ensuring smooth operation. The A-Premium Rear Trunk Latch Tailgate Door Lock Actuator (part numbers 51247269543 and V20850136) has garnered attention among owners of various BMW models, including the 328d xDrive, 328i xDrive, 5 Series variants, 7 Series, and X5, for its compatibility and performance. This component is designed to address common wear-and-tear issues, such as intermittent locking failures or unresponsive boot mechanisms, which can frustrate owners accustomed to the precision engineering of their vehicles.
Compatibility and Design
The actuator’s broad compatibility is a standout feature, catering to over a dozen BMW models produced between 2010 and 2017. This includes petrol, diesel, hybrid, and high-performance M variants, ensuring that owners of vehicles like the 535i, 750Li, or ActiveHybrid 5 can find a direct-fit solution. The component mirrors the OEM design, with dimensions and mounting points engineered to align seamlessly with factory specifications. Constructed from durable ABS plastic and reinforced metal internals, the unit balances lightweight construction with resilience against daily stress. One BMW X5 owner noted, “The fit was spot-on – no modifications needed, and it clicked into place like the original part,” highlighting the precision of its design.
Installation and Usability
Ease of installation is frequently praised by those who have opted for this aftermarket actuator. The process typically requires basic hand tools, such as a Torx set and trim removal tools, with most users reporting completion within an hour. A common observation among DIY enthusiasts is the clarity of the component’s wiring harness connections, which are colour-coded to match the vehicle’s existing loom. “Even with limited mechanical experience, I managed to replace it by following a tutorial online. The connectors were intuitive, and there was no guesswork,” shared a 528i owner. However, some recommend inspecting the tailgate’s wiring for corrosion during installation, as pre-existing electrical issues could affect performance.
Performance and Durability
In terms of functionality, users report a noticeable improvement in locking speed and consistency post-installation. The actuator’s motor operates with a subdued hum, aligning with BMW’s reputation for refined operation. A 550i owner remarked, “The boot now locks instantly with a solid thunk, just like when the car was new.” The unit’s resistance to temperature fluctuations is another plus, with no reported lag during cold winters or humid summers. While long-term durability data is limited, the two-year warranty offered by A-Premium provides reassurance, and early adopters have yet to report issues after 12–18 months of use.
User Feedback and Practical Considerations
Feedback consistently underscores the actuator’s value proposition. Many appreciate the elimination of intermittent faults, such as warning messages on the iDrive system or the need to manually reposition the latch. One 740i driver stated, “It fixed the recurring ‘trunk open’ alert that my dealership couldn’t resolve permanently.” Critics of aftermarket parts might question whether a non-OEM component can match BMW’s engineering standards, but users argue that the A-Premium unit operates indistinguishably from the original. A minor gripe mentioned by a handful of users involves the packaging – while adequately protected, some suggest including a spare set of trim clips for reinstallation, as older vehicles’ clips may become brittle over time.
Conclusion
For BMW owners facing tailgate lock issues, the A-Premium actuator presents a compelling solution that balances precision engineering with user-friendly installation. Its adherence to OEM specifications ensures compatibility across a wide range of models, while the robust construction addresses common failure points in high-mileage vehicles. The positive consensus among users – particularly regarding fitment accuracy and restored functionality – positions this component as a pragmatic choice for those seeking reliable performance without compromising on quality. As with any replacement part, pairing it with a thorough inspection of the tailgate’s electrical system will yield optimal results, ensuring the actuator operates within its intended parameters for years to come.
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