{"product_id":"o2-oxygen-sensor-upstream-downstream-for-volkswagen-jetta-2005-2014-2-5l","title":"O2 Oxygen Sensor Upstream Downstream for Volkswagen Jetta (2005-2014) 2.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream O2 Oxygen Sensor Kit for 2005-2014 Volkswagen Jetta (Mk5\/Mk6)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This matched upstream and downstream oxygen sensor kit monitors exhaust oxygen levels on the 2005-2014 Volkswagen Jetta (\u003cstrong\u003eMk5\/Mk6\u003c\/strong\u003e) \u003cstrong\u003e2.5L 5-Cylinder\u003c\/strong\u003e to regulate closed-loop fuel trims and catalyst efficiency.\u003c\/p\u003e\u003ch3\u003eThe Stock Volkswagen Jetta Oxygen Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eMk5\/Mk6 (1K\/5C)\u003c\/strong\u003e Jetta equipped with the \u003cstrong\u003e2.5L 5-Cylinder (BGP\/BGQ\/CBT\/CBUA)\u003c\/strong\u003e endure extreme thermal cycling, carbon soot buildup, and exhaust condensation. Over time, thermal shock fractures the zirconia ceramic element while internal heater circuits burn out from continuous duty. Once fouled or open-circuited, the ECM loses accurate lambda feedback and catalyst monitoring, triggering faults like \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, and \u003cstrong\u003eP0141\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Oxygen Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Triggers \u003cstrong\u003eP0130\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e, or \u003cstrong\u003eP0171\u003c\/strong\u003e from heater burnout or delayed voltage switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSluggish Sensor Feedback:\u003c\/strong\u003e Soot-fouled ceramic elements flatten lambda oscillation and prevent OBD-II readiness monitors from setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Economy \u0026amp; Emissions Drop:\u003c\/strong\u003e Uncorrected rich fuel-trim drift wastes fuel and causes emissions inspection failure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Matched O2 Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing both sensors as a matched set—upstream \u003cstrong\u003e234-5102\u003c\/strong\u003e and downstream \u003cstrong\u003e234-4754\u003c\/strong\u003e—restores balanced signal response across the catalytic converter. Each unit utilizes a laser-welded stainless steel body, a fast-light-off ceramic heater core, and a double-layered shield to resist exhaust poisoning and moisture shock. Factory-length wiring harnesses and weather-sealed OE connectors ensure direct thread-in installation without splicing, restoring closed-loop fuel trim precision.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1x Upstream Oxygen Sensor (\u003cstrong\u003e234-5102\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e1x Downstream Oxygen Sensor (\u003cstrong\u003e234-4754\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2005-2014 Volkswagen Jetta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2.5L 5-Cylinder (BGP\/BGQ\/CBT\/CBUA) \/ Mk5 \u0026amp; Mk6 (1K\/5C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eSensor Architecture\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eHeated Zirconia Upstream \u0026amp; Downstream Direct-Fit OE Plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Thread-In OEM Replacement (No Cutting or Splicing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e234-5102, 234-4754\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2005-2014 Volkswagen Jetta 2.5L (Confirm engine before ordering)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the Mk5\/Mk6 Jetta?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for the 2005-2014 Volkswagen Jetta with the \u003cstrong\u003e2.5L 5-Cylinder (BGP\/BGQ\/CBT\/CBUA)\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 1.8T, 2.0L, 2.0T, and TDI models; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135, P0141, or P0420 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when caused by faulty sensors.\u003c\/strong\u003e Replacing \u003cstrong\u003e234-5102\u003c\/strong\u003e and \u003cstrong\u003e234-4754\u003c\/strong\u003e resolves heater and response codes (\u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e); persistent \u003cstrong\u003eP0420\u003c\/strong\u003e indicates catalyst failure.\u003c\/p\u003e\u003ch4\u003eAre OE-style connectors included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Both sensors include factory-terminated plugs—thread into clean bungs, torque to 30–35 lb-ft, and clear ECU codes.\u003c\/p\u003e\u003ch3\u003eThe Volkswagen Precision Standard\u003c\/h3\u003e\u003cp\u003eEngineered for Bosch Motronic accuracy on the \u003cstrong\u003eMk5\/Mk6\u003c\/strong\u003e \u003cstrong\u003e2.5L\u003c\/strong\u003e, this sensor set restores closed-loop lambda control and CEL-free compliance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68094268866808,"sku":"DS-E454POHTW","price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-volkswagen-jetta-2005-2014-2-5l-1.jpg?v=1794618859","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-volkswagen-jetta-2005-2014-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}