{"product_id":"discovery-4-interior-ultrasonic-alarm-sensor-ah42-15k609-ac-land-rover","title":"Discovery 4 Interior Ultrasonic Alarm Sensor AH42-15K609-AC Land Rover","description":"\u003cp\u003e#72\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e♻️ GENUINE LAND ROVER DISCOVERY 4 L319 INTERIOR ULTRASONIC MOTION ALARM SENSOR – AH42-15K609-AC\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eGenuine used Land Rover Discovery 4 L319 interior ultrasonic \/ motion alarm sensor module, designed for the factory vehicle security and interior monitoring system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis sensor monitors movement within the passenger compartment when the vehicle alarm system is armed and helps detect unauthorised entry or movement inside the vehicle.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePart Number: AH42-15K609-AC\u003c\/p\u003e\u003cp\u003eAlternative Format: AH4215K609AC\u003c\/p\u003e\u003cp\u003eOE \/ Cross Reference: LR019354\u003c\/p\u003e\u003cp\u003eRelated Engineering Reference: AH42-15K609-A\u003c\/p\u003e\u003cp\u003ePart Type: Interior Ultrasonic Alarm Sensor \/ Motion Sensor\u003c\/p\u003e\u003cp\u003eSystem: Vehicle Security \/ Interior Alarm Monitoring\u003c\/p\u003e\u003cp\u003ePosition: Interior \/ Roof Area\u003c\/p\u003e\u003cp\u003eManufacturer: Land Rover \/ OEM\u003c\/p\u003e\u003cp\u003eCondition: Genuine Used\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCompatibility\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eConfirmed applications include:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Land Rover Discovery 4 L319 – 2009–2016\u003c\/p\u003e\u003cp\u003e• Discovery 4 2.7 TDV6 applications where matching equipment is fitted\u003c\/p\u003e\u003cp\u003e• Discovery 4 3.0 TDV6 \/ SDV6 applications where matching equipment is fitted\u003c\/p\u003e\u003cp\u003e• Vehicles equipped with the factory interior alarm \/ volumetric monitoring system\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe exact AH42-15K609-AC number is specifically documented as a Discovery 4 L319 interior ultrasonic alarm sensor. Used-parts references also show it on both 2.7 TDV6 and 3.0 TDV6 Discovery 4 applications.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAdditional Applications\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe same AH42-15K609-AC engineering number is also documented on selected:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Range Rover Sport L320\u003c\/p\u003e\u003cp\u003e• Range Rover L322\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ewhere the same factory interior alarm sensor system is installed.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCompatibility with these vehicles should be confirmed by matching the complete engineering number and electrical connector.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eTechnical Information\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis module forms part of the Land Rover factory anti-theft alarm system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe ultrasonic \/ motion monitoring system is designed to detect movement inside the passenger compartment after the vehicle has been locked and the alarm system has been armed.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe sensor communicates with the vehicle security system so that detected interior movement can contribute to an alarm activation.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eVehicle Security System Information\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe sensor works together with components including:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Vehicle alarm system\u003c\/p\u003e\u003cp\u003e• Body Control Module \/ security electronics\u003c\/p\u003e\u003cp\u003e• Door and tailgate monitoring\u003c\/p\u003e\u003cp\u003e• Bonnet monitoring\u003c\/p\u003e\u003cp\u003e• Central locking system\u003c\/p\u003e\u003cp\u003e• Alarm siren\u003c\/p\u003e\u003cp\u003e• Interior volumetric \/ ultrasonic monitoring system\u003c\/p\u003e\u003cp\u003e• Associated wiring and electrical connectors\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis allows the vehicle to monitor not only the doors and other entry points but also movement inside the cabin when interior monitoring is active.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCommon Symptoms \/ Reasons for Replacement\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Alarm triggering unexpectedly\u003c\/p\u003e\u003cp\u003e• False alarm activations\u003c\/p\u003e\u003cp\u003e• Interior monitoring not operating\u003c\/p\u003e\u003cp\u003e• Alarm system fault\u003c\/p\u003e\u003cp\u003e• Diagnostic fault relating to interior monitoring\u003c\/p\u003e\u003cp\u003e• Sensor damaged during headlining removal\u003c\/p\u003e\u003cp\u003e• Electrical connector damaged\u003c\/p\u003e\u003cp\u003e• Water or moisture damage\u003c\/p\u003e\u003cp\u003e• Internal sensor failure\u003c\/p\u003e\u003cp\u003e• Original sensor missing\u003c\/p\u003e\u003cp\u003e• Replacement following interior or roof repairs\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eImportant Diagnostic Information\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eFalse alarms do not automatically mean that the ultrasonic sensor is faulty.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBefore replacement, check:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Alarm system fault codes\u003c\/p\u003e\u003cp\u003e• Sensor electrical connector\u003c\/p\u003e\u003cp\u003e• Wiring and power supply\u003c\/p\u003e\u003cp\u003e• Door and tailgate switches\u003c\/p\u003e\u003cp\u003e• Bonnet switch\u003c\/p\u003e\u003cp\u003e• Alarm siren system\u003c\/p\u003e\u003cp\u003e• Interior monitoring configuration\u003c\/p\u003e\u003cp\u003e• Evidence of moisture or water ingress\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMovement inside the vehicle, open windows or other security-system faults may also affect alarm operation.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCorrect diagnostic testing is recommended before replacing electronic security components.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eInstallation\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe module is installed within the vehicle interior \/ roof area as part of the factory alarm monitoring system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eWhen replacing:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Disconnect the electrical connector carefully\u003c\/p\u003e\u003cp\u003e• Avoid pulling on the wiring\u003c\/p\u003e\u003cp\u003e• Check terminals for corrosion or damage\u003c\/p\u003e\u003cp\u003e• Ensure the sensor is securely mounted\u003c\/p\u003e\u003cp\u003e• Refit surrounding interior trim correctly\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCare should be taken when removing roof\/headlining trim because plastic retaining clips can become brittle with age.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eProgramming \/ Coding\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eFor a like-for-like replacement using the identical AH42-15K609-AC specification, separate programming may not always be necessary.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eHowever, because this component operates as part of the vehicle security system, the alarm system should be checked with suitable diagnostics after installation if faults remain.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAny stored fault codes may need to be cleared after the underlying problem has been repaired.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eImportant Compatibility Note\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e⚠️ Please match the complete part number before purchasing.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCheck:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• AH42-15K609-AC\u003c\/p\u003e\u003cp\u003e• AH4215K609AC\u003c\/p\u003e\u003cp\u003e• LR019354 where applicable\u003c\/p\u003e\u003cp\u003e• Electrical connector\u003c\/p\u003e\u003cp\u003e• Sensor housing\u003c\/p\u003e\u003cp\u003e• Mounting arrangement\u003c\/p\u003e\u003cp\u003e• Factory alarm specification\u003c\/p\u003e\u003cp\u003e• Listing photographs\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAlthough the same sensor is documented across several Land Rover applications, do not purchase solely by vehicle model and year.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMatching the original part number is the safest way to confirm compatibility.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCondition\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eGenuine used Land Rover part.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMay show normal signs of previous use, removal and storage, including light cosmetic marks.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePlease inspect all supplied photographs carefully for the exact condition, connector and mounting points of the item supplied.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e♻️ Genuine Land Rover Discovery 4 L319 interior ultrasonic \/ motion alarm sensor AH42-15K609-AC – ideal replacement for a damaged or faulty factory interior alarm monitoring sensor.\u003c\/p\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Land Rover\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCustom Bundle:\u003c\/strong\u003e No\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e AH42-15K609-AC\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e Alarm Sensor\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMPN:\u003c\/strong\u003e AH42-15K609-AC\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnit Quantity:\u003c\/strong\u003e 1\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e DM-200522-1037\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eModified Item:\u003c\/strong\u003e No\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United Kingdom\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eColour:\u003c\/strong\u003e Beige\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Land Rover","offers":[{"title":"Default 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