BMW Central Door Lock Actuator / System Lock – 51227281939

Check part compatibility by using our vehicle filter options below. If you find your car, this part is compatible.

Ensure dependable locking control for your BMW with this aftermarket central door lock actuator (part 51227281939). Designed for rear-left (system lock) use, this component restores smooth, reliable central locking operation and fixes common faults such as intermittent locking, unresponsive doors, or central locking failure. Manufactured to OEM standards, it ensures a perfect fit and long-lasting performance, helping you maintain the original locking behaviour of your vehicle.

OEM Number: 7362785/7281939/7473147/7488003/51227488003, 51227281939/51227362785/51227473147/51227488003

Direct replacement – High-Quality Aftermarket

Part Condition - Brand New

Operating Mode - Electric

Number of pins - 4 -pin connector

Vehicle Equipment - For vehicles without door pull assist

Fitting Position - Rear Left - Passenger Side

Lock System - with central locking, without double sealing

Our SKU: TB51227281939_313

All our Central Door Lock Actuator Mechansim 51227281939 For Bmw X1 X2 X5 X6 are OEM quality and reliable after market car parts. This Central Door Lock Actuator Mechansim 51227281939 For Bmw X1 X2 X5 X6 is specifically compatible with BMW: 2 Series, 5 Series, 7 Series, 8 Series, i3, iX3, X1, X2, X3, X4, X5, X6, X7, Mini: Mini, Mini Clubman, Mini Countryman, .

Please use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.

If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

FAQs 

1. What does the part 51227281939 do?
This is a system lock (actuator + latch) for the rear-left door, integrating with the central locking system to control locking/unlocking of that specific door.

2. What BMW models is this actuator compatible with?
this part is used in BMW X2 (F39) models from around 2018–2020.
If you're unsure about compatibility with your car, provide your VIN or registration, and we can check fitment for you.

3. What are the symptoms of a failing central door lock actuator?

• Central locking doesn't operate for one door

• The door doesn’t lock/unlock with the key fob

• You hear clicking or humming when you try to lock/unlock

• Sometimes the car thinks the door is open when it's not — this can cause warning lights or prevent locking.

4. Is this a genuine BMW OEM part?
this is aftermarket car part.

5. How difficult is the installation?
Installation typically involves removing the rear-left door panel, unplugging the old actuator/latch, and fitting the new unit. For non-expert users, we recommend a professional install to avoid damaging the door internals.

6. Will replacing this fix my central locking issue?
If your problem is caused by a faulty actuator or latch in the rear-left door, replacing this part usually resolves it. However, if the issue is electrical (e.g. wiring, control module), further diagnostics may be needed. Reddit users have reported replacing the actuator fixed central locking problems.

7. Is there a warranty on this part?
All products are protected by a upto 10 year worry-free warranty depending on Part.

8. Can I drive with a faulty actuator?
While your car may still drive, a bad actuator can prevent that door from locking properly, which is a security risk and could also trigger warning lights.

9. Why should I choose this part from D2P AutoParts (or a trusted OEM supplier)?

• OEM-grade quality for peace of mind

• Ensures reliable, long-term locking performance

• Helps restore proper central lock function

• Compatible replacement — designed to match factory parts

1. Standard Shipping (Free) - Please allow 1-3 days for your order to be delivered 
2. DPD Next Day (£4.99) - Please place orders between Monday - Thursday before 4 PM UK time. This service applies to UK Mainland orders only.
3. Royal Mail Special Special Saturday Delivery (£19) - Please place orders between Monday - Friday before 3 PM UK time. 
4. International - Rates vary based on product size. Please enquire for further details. 

We do not provide any guarantees on shipping times, as we are reliant on 3rd parties. However, we strive to ensure that our customers are always satisfied.

All products are protected by a upto 10 year worry-free warranty depending on Part 

Warranty Coverage: Eligibility: To be eligible for 10-year warranty coverage, the car part must be fitted by a certified professional mechanic. Proof of fitment, including the mechanic's certification, must be submitted to Amesplan LTD within 30 days of the part's purchase date. Please send supporting documentation to us via email.In case a purchased product becomes faulty during its warranty period, for reasons unrelated to your acts, omissions or misuse of the goods, you must promptly notify us and fill out a warranty claim form. 

Warranty Non-Coverage: We do not have any liability for any defect arising from normal wear & tear, wilful damage, negligence, tampering of the goods, incorrect fitting of the goods by you and/or a third party. We are also not liable for any abnormal working conditions, alteration or repair of the goods or a failure to follow goods manufacturers' instructions (whether oral or in writing) 

We have a 180-day return policy, which means you have 180 days after receiving your item to request a return. 

To be eligible for a return, your item must be in the same condition that you received it, unused, and in its original packaging. You will also need the receipt or proof of purchase. 

For All Return buyers pay Return Postage.Returns will only be processed after we receive the approved part and a member of our team fully inspects the returned item & successfully matches the returned part to the return reason. 

For All UK orders, we offer free return. We do not offer any reimbursement of shipping costs for Any orders on original sale like Next Day Postage. 

For All Outside UK order  We do not offer any reimbursement of shipping costs for Any orders on either the original sale or the return. 

Please direct all questions to sales@d2pautoparts.com. 

Damages and issues 
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exchanges 

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds 
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund.