{"product_id":"walker-350-34421-oxygen-sensor-upstream","title":"Walker 350-34421 Oxygen Sensor - Upstream","description":"\u003ch2\u003eWalker OE Replacement Oxygen Sensor for BMW 320i\u003c\/h2\u003e\u003cp\u003eWalker OE Replacement oxygen sensor part number 350-34421 is a direct-fit heated sensor for the 1995 BMW 320i, upstream position. It is built around the listed OE-style dimensions and connector layout to support accurate exhaust feedback in the original sensor location.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 1995 BMW 320i, upstream\u003c\/li\u003e\n\u003cli\u003eHeated oxygen sensor design for faster operating temperature\u003c\/li\u003e\n\u003cli\u003eSpecific-fit application for direct vehicle matching\u003c\/li\u003e\n\u003cli\u003e4-wire configuration with female connector\u003c\/li\u003e\n\u003cli\u003e18.00 mm thread diameter for the specified exhaust bung\u003c\/li\u003e\n\u003cli\u003eWiring harness length: 6.22\u003c\/li\u003e\n\u003cli\u003eOverall length: 9.76\u003c\/li\u003e\n\u003cli\u003eWire gauge measurement: 20\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eWalker OE Replacement 350-34421 is an oxygen sensor for the 1995 BMW 320i in the upstream location. As an OE Replacement line part, it follows the vehicle-specific fitment profile needed for a direct replacement in the exhaust stream, with a heated sensing element, 4-wire layout, and female connector. The 18.00 mm thread diameter and listed harness dimensions help match the original mounting and electrical connection requirements on the BMW 320i.\u003c\/p\u003e\u003cp\u003eThis part number, 350-34421, is focused on restoring proper upstream exhaust monitoring on the BMW 320i without changing the factory-style sensor location. Walker 350-34421 is a practical choice when replacing a worn or slow-responding oxygen sensor in the 1995 BMW 320i.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCheck engine light related to upstream oxygen sensor performance\u003c\/li\u003e\n\u003cli\u003eIncorrect air-fuel feedback from a degraded sensor\u003c\/li\u003e\n\u003cli\u003eRough idle or drivability issues tied to exhaust mixture control\u003c\/li\u003e\n\u003cli\u003eFailed emissions inspection caused by sensor response problems\u003c\/li\u003e\n\u003cli\u003eSlow sensor warm-up in the exhaust system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eConfirm the upstream sensor location before installation and verify the connector style, thread diameter, and harness length against the original part. Because this is a specific-fit oxygen sensor for the 1995 BMW 320i, matching the connector and mounting thread is important for proper installation. Inspect the exhaust bung threads and surrounding wiring before fitting the new sensor.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker OE Replacement parts are positioned as direct-fit service components for vehicle-specific repair work. This oxygen sensor is built to match the listed application details for the 1995 BMW 320i upstream location, supporting a straightforward OE-style replacement process.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":51870212128949,"sku":"DKHD-350-34421","price":105.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_35034421_Fro.jpg?v=1774892077","url":"https:\/\/www.partcatalog.com\/products\/walker-350-34421-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}