{"product_id":"rear-view-mirror-auto-dim-top-sensor-land-rover-discovery-4-range-rover-sport","title":"Rear View Mirror Auto Dim Top Sensor Land Rover Discovery 4 Range Rover Sport","description":"\u003cp\u003e#72\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e♻️ GENUINE LAND ROVER DISCOVERY 4 L319 AUTO-DIMMING INTERIOR REAR VIEW MIRROR – AH42-17E678-AC \/ LR019913\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eGenuine used Land Rover Discovery 4 L319 interior rear-view mirror with automatic dimming \/ auto-dip function.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe electrochromic mirror automatically reduces reflected glare from headlights behind the vehicle when driving at night, improving rear visibility and driver comfort.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eEngineering Part Number: AH42-17E678-AC\u003c\/p\u003e\u003cp\u003eAlternative Number: AH4217E678AC\u003c\/p\u003e\u003cp\u003eOE \/ Cross Reference: LR019913\u003c\/p\u003e\u003cp\u003ePart Type: Interior Rear View Mirror\u003c\/p\u003e\u003cp\u003eFunction: Automatic Dimming \/ Auto Dip\u003c\/p\u003e\u003cp\u003ePosition: Front Centre Interior \/ Windscreen\u003c\/p\u003e\u003cp\u003eSystem: Interior Visibility \/ Auto-Dimming Mirror System\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 application:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Land Rover Discovery 4 L319\u003c\/p\u003e\u003cp\u003e• Discovery 4 models equipped with the matching electrically operated auto-dimming interior mirror\u003c\/p\u003e\u003cp\u003e• 2.7 TDV6 applications where matching equipment is fitted\u003c\/p\u003e\u003cp\u003e• 3.0 TDV6 \/ SDV6 applications where matching equipment is fitted\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe exact AH42-17E678-AC engineering number is specifically catalogued as a Discovery 4 L319 Interior Rear View Mirror Auto Dip, with LR019913 given as a substitute\/OE reference. (GlobalParts)\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eRelated Land Rover Applications\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eSimilar 17E678 mirrors were used across other Land Rover and Range Rover models, including:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Range Rover Sport L320\u003c\/p\u003e\u003cp\u003e• Freelander 2 \/ L538 applications with certain mirror versions\u003c\/p\u003e\u003cp\u003e• Later Range Rover Sport applications using different CPLA\/GPLA 17E678 variants\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eHowever, AH42-17E678-AC should not automatically be advertised as fitting every Range Rover Sport.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eFor example, later L494 Range Rover Sport vehicles are documented with different engineering numbers such as CPLA-17E678-AA and GPLA-17E678-GC, particularly where additional driver-assistance equipment is fitted. (RRSport)\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eTechnical Information\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis mirror uses electrochromic automatic-dimming technology.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eWhen bright headlights from a following vehicle are detected, the mirror darkens automatically to reduce reflected glare.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eWhen the glare decreases, the mirror returns towards its normal reflective state.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis provides:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Reduced glare from vehicles behind\u003c\/p\u003e\u003cp\u003e• Improved comfort during night driving\u003c\/p\u003e\u003cp\u003e• Less need for manual mirror adjustment\u003c\/p\u003e\u003cp\u003e• Factory Land Rover interior appearance\u003c\/p\u003e\u003cp\u003e• Automatic response to changing lighting conditions\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAuto-Dimming System Information\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe mirror incorporates light-sensing technology used to determine when dimming is required.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe system relies on the correct:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Mirror electronics\u003c\/p\u003e\u003cp\u003e• Light sensing elements\u003c\/p\u003e\u003cp\u003e• Electrical power supply\u003c\/p\u003e\u003cp\u003e• Wiring and connector\u003c\/p\u003e\u003cp\u003e• Vehicle specification\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eFor correct operation, the sensor areas should not be obstructed.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCommon Symptoms \/ Reasons for Replacement\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Mirror no longer automatically dims\u003c\/p\u003e\u003cp\u003e• Mirror remains permanently dark\u003c\/p\u003e\u003cp\u003e• Intermittent auto-dimming operation\u003c\/p\u003e\u003cp\u003e• Mirror glass damaged\u003c\/p\u003e\u003cp\u003e• Internal electrochromic layer deteriorated\u003c\/p\u003e\u003cp\u003e• Mirror housing damaged\u003c\/p\u003e\u003cp\u003e• Electrical connector damaged\u003c\/p\u003e\u003cp\u003e• Mounting point damaged\u003c\/p\u003e\u003cp\u003e• Sensor fault\u003c\/p\u003e\u003cp\u003e• Replacement required following windscreen work\u003c\/p\u003e\u003cp\u003e• Original mirror missing\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eImportant Diagnostic Information\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eA non-functioning auto-dimming mirror does not automatically mean the complete mirror is faulty.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBefore replacement, check:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Electrical connector\u003c\/p\u003e\u003cp\u003e• Wiring\u003c\/p\u003e\u003cp\u003e• Power and ground supply\u003c\/p\u003e\u003cp\u003e• Sensor areas for obstruction\u003c\/p\u003e\u003cp\u003e• Mirror mounting\u003c\/p\u003e\u003cp\u003e• Vehicle specification\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIf replacing with a used unit, matching the complete engineering number is strongly recommended.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eInstallation\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe mirror mounts to the factory interior windscreen mounting arrangement.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eDuring installation:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Compare the mounting bracket with your original\u003c\/p\u003e\u003cp\u003e• Disconnect\/connect the electrical plug carefully\u003c\/p\u003e\u003cp\u003e• Avoid damaging the windscreen mounting point\u003c\/p\u003e\u003cp\u003e• Ensure wiring is correctly routed\u003c\/p\u003e\u003cp\u003e• Do not obstruct the light sensors\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eExtra care should be taken when removing a mirror from the windscreen mounting point to avoid damaging the windscreen.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eProgramming \/ Coding\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eFor a straightforward like-for-like AH42-17E678-AC replacement, separate programming is not normally expected for the basic auto-dimming function.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eHowever, mirrors with additional equipment can have different electrical and vehicle configuration requirements.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis is particularly important when comparing the Discovery 4 mirror with later Range Rover Sport mirrors incorporating features such as Auto High Beam Assist or driver-assistance cameras. (RRSport)\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eImportant Compatibility Note\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e⚠️ Please match the complete mirror specification before purchasing.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCheck:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• AH42-17E678-AC\u003c\/p\u003e\u003cp\u003e• AH4217E678AC\u003c\/p\u003e\u003cp\u003e• LR019913 where applicable\u003c\/p\u003e\u003cp\u003e• Electrical connector\u003c\/p\u003e\u003cp\u003e• Number of pins\u003c\/p\u003e\u003cp\u003e• Windscreen mounting arrangement\u003c\/p\u003e\u003cp\u003e• Sensor configuration\u003c\/p\u003e\u003cp\u003e• Mirror housing shape\u003c\/p\u003e\u003cp\u003e• Additional driver-assistance equipment\u003c\/p\u003e\u003cp\u003e• Listing photographs\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eLand Rover used numerous 17E678 mirror variants depending on model, year and vehicle equipment.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eDo not assume that another 17E678 mirror is interchangeable simply because the base engineering number is similar.\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, including light scratches, marks or cosmetic wear to the housing.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePlease inspect all listing photographs carefully for the condition of the mirror glass, housing, connector and mounting point.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e♻️ Genuine Land Rover Discovery 4 L319 electrochromic auto-dimming interior rear-view mirror AH42-17E678-AC \/ LR019913 – ideal replacement for a damaged or faulty original auto-dip mirror.\u003c\/p\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e Rear View Mirror\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e Glass\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade:\u003c\/strong\u003e Good\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuperseded Part Number:\u003c\/strong\u003e Range Rover Sport\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlacement on Vehicle:\u003c\/strong\u003e Windscreen\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference OE\/OEM Number:\u003c\/strong\u003e Discovery 3\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eColour:\u003c\/strong\u003e Black\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Land Rover\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Rear View Mirror\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInterchange Part Number:\u003c\/strong\u003e Land Rover\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAttachment Type:\u003c\/strong\u003e Clip-On\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClassic Part:\u003c\/strong\u003e No\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e Automatic Dimming\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUniversal Fitment:\u003c\/strong\u003e No\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e DM-130722-0934\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFinish:\u003c\/strong\u003e Textured\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e United Kingdom\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Part:\u003c\/strong\u003e No\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Land Rover","offers":[{"title":"Default Title","offer_id":55045722898759,"sku":"158298615535","price":21.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/1528\/3527\/files\/10_659a1e50-8484-4e16-a74d-5555a9744293.jpg?v=1789576315","url":"https:\/\/spares4repairs.store\/products\/rear-view-mirror-auto-dim-top-sensor-land-rover-discovery-4-range-rover-sport","provider":"Spares 4 Repairs","version":"1.0","type":"link"}