FOR SALE IS ONE (1) NEW PREMIUM OXYGEN (O2) SENSOR BY BOSCH BRAND BY ROBERT BOSCH LLC MPN 13444 aka 02580057384UG UPC# 028851134446. THIS IS A POST (downstream or after) CATALYTIC CONVERTER OXYGEN SENSOR (aka downstream O2 sensor) WHICH IS LOCATED UNDER VEHICLE, ATTACHED TO THE VEHICLE EXHAUST SYSTEM (after or post catalytic converter). THIS SENSOR COMMUNICATES WITH YOUR VEHICLE COMPUTER WHICH DETERMINES THE BEST FUEL RATIO (rich or lean), FOR OPTIMAL ENGINE PERFORMANCE. IF YOUR SERVICE ENGINE SOON or CHECK ENGINE LIGHT HAS ILLUMINATED AND YOUR TROUBLE CODE REVEALS DOWNSTREAM OXYGEN SENSOR TROUBLE CODE(s), REPLACEMENT OF THE SENSOR(s) IS A RECOMMENDED FIRST STEP. AS LONG AS YOUR DASHBOARD SES (service engine soon) OR TROUBLE LIGHT IS ILLUMINATED, DUE TO DOWNSTREAM O2 SENSOR ISSUES, YOUR VEHICLE WILL RUN A RICHER FUEL MIXTURE WHICH WILL CREATE ADDITIONAL ISSUES LIKE POOR GAS MILEAGE, POSSIBLE CATALYTIC CONVERTER DAMAGE, ETC..... FIX IT NOW. AFTER YOUR NEW O2 SENSOR INSTALL, EITHER CLEAR YOUR TROUBLE CODE(s) OR, (i prefer to...) ALLOW ONE OR TWO HUNDRED MILES FOR YOUR COMPUTER TO RECOGNIZE YOUR NEW SENSOR AND TURN OFF THE TROUBLE LIGHT. BOSCH PREMIUM OXYGEN SENSORS ARE PRODUCED ON THE SAME PRODUCTION LINE AS ORIGINAL EQUIPMENT OXYGEN SENSORS. DO NOT USE SENSORS THAT ARE COMPATIBLE, SUBSTITUTES OR CHEAPEST CHINA IMPORTS, ALWAYS TRY TO USE "EXACT FIT" OR OEM. THIS NEW BOSCH O2 SENSOR FEATURES ORIGINAL EQUIPMENT CONNECTORS, ORIGINAL EQUIPMENT STYLE HARNESS. THAT MEANS A CONTINUOUS WIRE FROM CONNECTOR TO SENSOR. REQUIRES NO CUTTING, CRIMPING OR SPLICING. AUTHENTIC HIGHEST QUALITY BOSH IN FACTORY PACKAGING WITH ENGRAVED BOSCH MARKINGS ON THE SENSOR TO VERIFY GENUINE BOSCH AUTHENTICITY. THIS IS A RATHER EASY JOB FOR THE DO IT YOURSELFER WITH PATIENCE. I HAVE USED MANY DIFFERENT SENSORS ON MY 2001 CHEVY S10, 2.2L, MANUAL 5-SPEED PICKUP TRUCK, AND THIS BOSCH IS THE ONLY ONE THAT DELIVERS CONSISTENT AND RELIABLE PERFORMANCE. I BELIEVE BOSCH OXYGEN SENSORS TO BE THE BEST YOU CAN BUY. YOU WILL RECEIVE ONE NEW GENUINE BOSCH BRAND 13444 PREMIUM DOWNSTREAM OXYGEN SENSOR SHIPPED IN FACTORY PACKAGING BY USPS FIRST CLASS MAIL.....

Height--5.8268 inches
Length--2.2047 inches
Width--1.9685 inches
Weight--.2998 pounds

note..... your service engine soon light or check engine light may re-illuminate following installation of a factory fresh oxygen sensor and clearing of trouble code(s).
your vehicle computer requires some mileage history to determine the o2 status after installation of a new sensor and clearing of trouble code(s).
i often recommend a tank full of high quality premium gas along with a bottle of techron, lucas or stp fuel system cleaner for good measure. 
now may also be a good time to carefully replace your spark plugs with oem spark plugs (don't rely on the counter sales guy, read your manual).
finally, take your vehicle for a non-aggressive 25-50 mile long cruise on the open road.

 BID AND BUY HERE IN IN ABSOLUTE CONFIDENCE SINCE I HAVE THOUSANDS OF POSITIVE FEEDBACK AND TEN+ YEARS EXPERIENCE. I SHIP WITHIN TWO DAYS OF RECEIPT OF PAYMENT, OFTEN THE NEXT DAY. $4.83USPS FIRST CLASS GREEN SHIPPING USING RECYCLED PACKAGING MATERIALS AND ENVIRONMENTALLY FRIENDLY MATERIALS TO ANYWHERE USA. I DO NOT SHIP ANYWHERE ELSE. HAVE A GREAT DAY AND THANK YOU FOR STOPPING BY.......