{"product_id":"oxygen-sensors-for-volkswagen-jetta-2005-2014-2-5l-downstream","title":"Oxygen Sensors for Volkswagen Jetta (2005-2014) 2.5L Downstream","description":"\u003ch2\u003eDirect-Fit Downstream Oxygen Sensor for 2005-2014 Volkswagen Jetta\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Downstream Oxygen Sensor monitors catalytic converter efficiency on the 2005-2014 Volkswagen Jetta 2.5L to ensure precise fuel trim monitoring, clear diagnostic trouble codes, and maintain closed-loop emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Volkswagen Jetta Catalyst Monitoring Degradation\u003c\/h3\u003e\n\u003cp\u003eOver extended service life, the factory downstream oxygen sensor on the \u003cstrong\u003eVolkswagen Jetta Mk5\u003c\/strong\u003e and \u003cstrong\u003eMk6\u003c\/strong\u003e platforms suffers from thermal fatigue, silica glazing, and carbon soot contamination. Positioned post-catalytic converter on the \u003cstrong\u003eEA855\u003c\/strong\u003e 2.5L inline-5 exhaust system, the OEM sensing element endures extreme exhaust gas temperature swings and condensation during cold starts. As the internal zirconia ceramic element ages, heater circuit resistance drifts and voltage response times slow down. This sensor latency triggers false catalyst efficiency fault codes (such as P0420), prevents the engine control module from completing emissions monitors, and leads to failed emissions testing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement downstream heated O2 sensor features a robust ceramic electrolyte core housed inside a corrosion-resistant 304 stainless steel body to withstand thermal cycling and road grime. A porous protective layer shields the planar sensing cell from exhaust particulate contamination, ensuring stable millivolt feedback to the factory ECU. Built to OE specifications, the assembly includes a heat-shielded wiring harness and direct-fit weather-pack connector for plug-and-play installation without wire splicing. Rapid-fire internal heating elements reach operating temperature quickly, eliminating cold-start diagnostic errors and restoring reliable secondary oxygen feedback on your \u003cstrong\u003eCBTA \/ CBUA\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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 EA855 I5 \/ Mk5, Mk6 (Typ 1K\/16)\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;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e150-170 hp \/ 170-177 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\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;\"\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2005-2010 Volkswagen Jetta Mk5 2.5L (Engine Codes: BGP, BGQ, CBTA, CBUA)\u003c\/li\u003e\n  \u003cli\u003e2011-2014 Volkswagen Jetta Mk6 2.5L (Engine Codes: CBTA, CBUA)\u003c\/li\u003e\n  \u003cli\u003ePosition: Downstream (Post-Catalyst \/ Sensor 2)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the Mk5 and Mk6 Jetta?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2005-2014 Volkswagen Jetta equipped with the EA855 2.5L 5-cylinder engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill replacing a worn downstream sensor clear a P0420 trouble code?\u003c\/strong\u003e\u003cbr\u003e Yes, if the diagnostic code is triggered by sensor element contamination or heater circuit failure rather than a physically damaged catalytic converter.\u003c\/p\u003e\n\n\u003ch3\u003eThe Volkswagen Precision Standard\u003c\/h3\u003e\n\u003cp\u003eVolkswagen engine management requires exact signal fidelity and electrical resistance curves. This downstream sensor delivers OE-matching feedback to maintain emission readiness monitors and keep your instrument cluster free of check engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50511224111352,"sku":"DS-ETZN3STHG","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/oxygen-sensors-for-volkswagen-jetta-2005-2014-2-5l-downstream-1.jpg?v=1789411559","url":"https:\/\/performancechiptuning.com\/es\/products\/oxygen-sensors-for-volkswagen-jetta-2005-2014-2-5l-downstream","provider":"Performance Chip Tuning","version":"1.0","type":"link"}