Volvo V50 2004-2012 Roof Alarm Movement Sensor Module
Factory original Volvo roof alarm / movement sensor control module. Built for the Volvo V50 Mk1/P1 5-door estate when the factory alarm movement sensor is fitted. Match the printed part number and connector before ordering.
Buy the correct part first time
This listing is for a used Volvo V50 roof alarm movement sensor module. It is the electronic alarm sensor fitted in the roof/headlining area and used by the alarm system to detect movement inside the vehicle when the alarm is armed.
Reference photos - correct Volvo V50 5-door estate and roof-console area
These photos are reference images to show the correct V50 estate body style and the roof/headliner area where this type of alarm sensor/roof module is located. They are not photos of the exact sale item; please use the eBay gallery for the exact item condition.
Where the part fits and what it controls
The roof alarm movement sensor sits in the upper roof/headliner area, around the interior light/roof console area and, on V50 estate applications, alarm sensor locations can include a front roof sensor and rear roof/load-area monitoring sensor depending on specification. It communicates with the vehicle alarm system so the car can monitor cabin/load-area movement after the doors are locked and the alarm is armed.
Compatibility fitment table
The safest match is Volvo V50 Mk1/P1 5-door estate with the same printed part number and connector. Cross-platform cars are shown only to help buyers check part numbers; they are not a reason to buy without matching the label and plug.
| Make / model | Body | Years | Status | Compatibility notes |
|---|---|---|---|---|
| Volvo V50 Mk1 / P1 | 5-door estate | 2004-2012 | Primary fit | Buy only if your vehicle has the factory alarm movement sensor and the old unit shows 5644A-3MS23 / 5644A3MS23 or matching cross-reference 31268870 / 30659265 family. Compare connector and pin layout. |
| Volvo V50 late registration | 5-door estate | 2013 registration only | Verify first | Some V50 cars may be registered after production. Do not buy by plate year alone. Check the old unit label, VIN/equipment and connector before ordering. |
| Volvo S40 Mk2 / P1 | 4-door saloon | 2004-2012 approx. | Part-number check only | Same alarm sensor family appears in S40/V50 catalogues, but roof/sunroof/chassis variants differ. Only suitable if the exact part code, connector and alarm equipment match. |
| Volvo C30 / P1 | 3-door hatchback | 2008-2013 approx. | Part-number check only | Some used-parts cross references show 31268870 / 5644A-3MS23 on C30 applications. Verify by the old module label and plug before purchase. |
| Volvo V70 / S60 / S80 / XC70 / XC90 | Various | Various | Cross-reference only | 30659265 and related numbers can appear in wider Volvo alarm catalogues, but this listing is for a V50 roof alarm sensor. Only buy if the exact physical module and number match. |
| Any non-Volvo or aftermarket alarm | Any | Any | Will not fit | This is not a universal sensor and is not for aftermarket alarm systems. |
Will not fit / do not buy if
- Your V50 does not have the factory alarm movement sensor option fitted.
- Your old part has a different printed number, different plug shape or different pin count.
- Your car uses a different sunroof/roof-hatch sensor version or ultrasonic sensor version.
- You are trying to fit it to a 3-door, saloon, hatchback or other Volvo model without confirming the exact part number.
- You are buying only because the registration year appears similar. Registration dates can overlap production dates.
Symptoms of a faulty roof alarm movement sensor
Common alarm issues
- Alarm going off randomly after locking the vehicle.
- False alarm triggers when nobody is inside the car.
- Interior movement detection not working correctly.
- Alarm system warning or stored alarm/movement sensor fault code.
- Intermittent communication fault from roof sensor module.
Why replace with a factory original Volvo part?
- Correct plug shape, casing and roof-panel fit.
- Designed to communicate with Volvo alarm electronics.
- Reduces risk of coding, trim fit or false-trigger problems caused by cheap copy parts.
- Used factory parts can save up to 70% compared with buying new from a dealer.
- Reusing working parts keeps good components out of waste streams.
Fitting instructions, tools and estimated repair time
Estimated time: 20-45 minutes for a straightforward swap, plus diagnostic time if fault codes need clearing or software/configuration needs checking.
Required tools
- Plastic trim removal tools to avoid marking the headlining/console.
- 10mm spanner/socket to disconnect the battery if required.
- Small torch or inspection light.
- Small flat trim pick for electrical connector lock tabs.
- Torx T20/T25 driver only if your roof console version uses screws.
- Diagnostic scanner for alarm/CEM fault-code reading and clearing.
Safety notes
- Work with ignition off and key removed.
- Do not pull hard on headlining or curtain airbag areas.
- Use trim tools, not screwdrivers, on visible trim surfaces.
- Professional fitting is recommended if you are unsure.
- We offer fitting service subject to availability.
Basic fitting procedure
- Confirm your old sensor label and connector match this listing before removing anything.
- Park safely, switch ignition off and remove the key. Disconnect the battery negative terminal if required by your workshop procedure.
- Carefully release the roof/interior light console or sensor trim using plastic trim tools.
- Unplug the old module by releasing the connector lock tab; do not pull the wiring.
- Fit the replacement module, ensuring the connector locks fully and the module sits flat in the trim.
- Refit the trim, reconnect the battery if disconnected, then lock/unlock and test the alarm system.
- Clear stored fault codes if needed. If faults remain, further diagnosis of wiring, alarm siren, CEM or software may be required.
Garage labour cost estimator - no active content
eBay blocks active JavaScript calculators, so this listing uses a clear static calculator table. Formula: garage hourly rate x estimated hours = labour cost. Parts, diagnostics, VAT, coding and additional faults can change the final price.
| Repair scenario | Estimated time | At £50/hr | At £70/hr | At £90/hr | At £120/hr |
|---|---|---|---|---|---|
| Quick sensor swap only | 0.5 hour | £25 | £35 | £45 | £60 |
| Careful trim removal + basic alarm test | 0.75 hour | £37.50 | £52.50 | £67.50 | £90 |
| Swap + diagnostic scan / fault code clear | 1.0 hour | £50 | £70 | £90 | £120 |
| Complex fault tracing if alarm still triggers | 1.5 hours | £75 | £105 | £135 | £180 |
ThePartPilot stock, service and dispatch
We hold more than 25,000 used vehicle parts on the shelf at any one time, ready for fast picking, careful packing and dispatch.
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Postage, VAT and worldwide delivery via eBay GSP
UK and international postage
We offer worldwide postage through eBay Global Shipping Programme where the item and destination are eligible. International buyers pay the international postage/import charges shown by eBay at checkout. We send the parcel to eBay's UK Shipping Centre and eBay handles the international leg.
VAT
Global VAT margin scheme: no VAT is charged or separately itemised on this used part. eBay may collect import VAT/duties for international buyers depending on destination rules.
eBay GSP eligible destination list
Non-EU countries: Antigua and Barbuda, Aruba, Australia, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Bermuda, Bolivia, Brazil, Brunei Darussalam, Cambodia, Canada, Cayman Islands, Chile, China, Colombia, Costa Rica, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, French Guiana, Grenada, Guadeloupe, Guatemala, Guernsey, Honduras, Hong Kong, Iceland, Indonesia, Israel, Jamaica, Japan, Jersey, Jordan, Kuwait, Liechtenstein, Macau, Malaysia, Maldives, Martinique, Mexico, Monaco, Montserrat, New Zealand, Nicaragua, Norway, Oman, Pakistan, Panama, Paraguay, Peru, Philippines, Qatar, Reunion, Saint Kitts and Nevis, Saint Lucia, Saudi Arabia, Singapore, South Africa, South Korea, Sri Lanka, Switzerland, Taiwan, Thailand, Trinidad and Tobago, Turks & Caicos Island, UAE, Ukraine, Uruguay, USA, Vietnam.
Delivery availability can still depend on eBay GSP item eligibility, restricted categories, parcel size/weight and destination rules.
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Return reduction and fitment support
Our goal is to help you order the correct part first time and avoid unnecessary returns, fitting delays and diagnostic frustration.
Before you buy
- Compare your old unit's printed part number with 5644A-3MS23 / 5644A3MS23.
- Check connector shape, pin count, mounting points and roof trim type.
- Use the eBay photos as the main evidence of the part supplied.
- Ask us through eBay messages if you are unsure before ordering.
Incorrectly ordered parts
Where a buyer orders incorrectly despite the fitment chart, part-number guidance and photo checks, returns/deductions are handled in line with eBay rules and applicable UK consumer law. A restocking or value deduction may be applied where permitted, especially if the item has been fitted, marked, damaged, or returned because the buyer did not verify compatibility.
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🚗By buying from ThePartPilot, you support a local independent parts business, skilled dismantling, careful stock control, proper packaging and affordable repairs for drivers worldwide.
💷You can save as much as 70% compared with buying new while still getting a part designed for the vehicle.