{"product_id":"standard-ignition-als3509-abs-wheel-speed-sensor-rear","title":"Standard Ignition ALS3509 ABS Wheel Speed Sensor - Rear","description":"\u003ch2\u003eStandard Ignition ALS3509 Rear ABS Sensor\u003c\/h2\u003e\u003cp\u003eStandard Ignition ALS3509 is a rear ABS wheel speed sensor for BMW applications that rely on accurate wheel-speed input for anti-lock braking system operation. It features a bolt-mount design, a female oval connector, and a 31-inch wiring harness for a direct-style replacement on the spindle location.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eABS wheel speed sensor for rear wheel applications\u003c\/li\u003e\n\u003cli\u003eBolt mount attachment with 1 mounting hole\u003c\/li\u003e\n\u003cli\u003eFemale oval connector with 2 terminals and male pin terminals\u003c\/li\u003e\n\u003cli\u003e31-inch (787.4 mm) wiring harness included\u003c\/li\u003e\n\u003cli\u003eBlack finish\u003c\/li\u003e\n\u003cli\u003eMounts at the spindle location\u003c\/li\u003e\n\u003cli\u003eCross-references Bosch 0986594629 and Delphi SS20784 for the same application\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eALS3509 is built for BMW rear ABS sensor service where the original sensor has failed, the harness is damaged, or the wheel-speed signal has become inconsistent. This part number, ALS3509, is listed for a wide range of BMW 2 Series, 3 Series, 4 Series, M models, and related GT and xDrive applications, including rear fitments on the BMW 320i, 328i, 330i, 430i, M2, M3, M4, and others. Standard Ignition ALS3509 uses a bolt-mount design with a single mounting point and an integrated harness to match the original routing at the spindle.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Fix\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eABS warning light caused by a failed rear wheel speed sensor\u003c\/li\u003e\n\u003cli\u003eIntermittent or missing wheel-speed signal\u003c\/li\u003e\n\u003cli\u003eTraction control or stability control faults tied to rear sensor input\u003c\/li\u003e\n\u003cli\u003eBrake system fault codes related to the rear spindle sensor circuit\u003c\/li\u003e\n\u003cli\u003eHarsh or inconsistent ABS activation during braking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify connector shape, terminal count, mounting style, and harness length before installation. This rear sensor mounts at the spindle with a bolt-mount attachment and one mounting hole, so the original routing and connector orientation should be checked against the vehicle harness. Confirm exact BMW year, model, and rear position before ordering; this part is listed for applications such as 2012-2016 BMW 328i, rear, 2017-2021 BMW 230i, rear, and 2015-2020 BMW M4, rear.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eStandard Ignition supplies this ABS wheel speed sensor as an OE-style replacement part for BMW rear wheel applications. The ALS3509 part number is cataloged against multiple interchange references, including Bosch and Delphi equivalents, to support accurate parts matching during brake sensor service.\u003c\/p\u003e","brand":"Standard Ignition","offers":[{"title":"Default Title","offer_id":52816432398517,"sku":"FBHK-ALS3509","price":176.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SI_ALS3509_Fro.jpg?v=1784356697","url":"https:\/\/www.partcatalog.com\/products\/standard-ignition-als3509-abs-wheel-speed-sensor-rear","provider":"PartCatalog","version":"1.0","type":"link"}