This genuine EGR differential pressure sensor is special matching spare part for. John Deere compact excavators, skid steer loaders, wheel loaders. Equipped with Yanmar Tier 4 final common rail engines. Installed on EGR pipeline, it adopts high precision piezoresistive chip to detect pressure difference between EGR inlet and outlet, transmits linear analog signal to engine ECU, core component for EGR flow closed-loop control, emission compliance monitoring and engine power protection. The sensor housing adopts integrated engineering plastic + stainless steel pressure sampling tube, dual pressure air nozzle design with built-in fluorine rubber anti-leak sealing ring, effectively prevent exhaust gas leakage under long-term construction severe vibration. Internal full temperature compensation pressure sensing chip, all circuit boards adopt high temperature epoxy vacuum full encapsulation, isolate engine compartment high heat, exhaust ash, mud and condensed water erosion. Equipped with exclusive 4-pin Molex fully sealed waterproof plug matching original John Deere wiring harness, plug-and-play without wire cutting or modification. EGR Flow Closed-Loop Emission Control. ECU calculates EGR recirculation flow accurately according to differential pressure signal, adjust EGR valve opening in real time to control exhaust gas recirculation volume, reduce NOx generation, ensure machinery meets Tier 4 emission standard, avoid excessive black smoke and urea abnormal consumption during excavation & loading work. EGR System Fault Early Warning & Power Derate Protection. When EGR pipeline blockage, sampling tube blockage or sensor signal loss occurs, machine monitor pops up emission fault alarm, ECU activates engine limited power limp mode to avoid vehicle lock-up on construction site; compatible with John Deere Service Advisor diagnostic tool to read EGR pressure difference circuit fault codes. Engine Combustion Optimization & Fuel Saving. Stable differential pressure feedback data assists ECU to correct fuel injection timing and air-fuel ratio, optimize low-speed and heavy-load combustion state, reduce full-load fuel consumption and exhaust particle emission. Quickly troubleshoot pressure signal drift, circuit open/short, plug pin oxidation, sampling pipe carbon deposition blockage and intermittent emission alarm faults. This MIU802948 EGR differential pressure sensor has passed IP67 waterproof/dustproof, high-low temperature cycle, exhaust gas corrosion and 18G long-term vibration aging tests, fully adapts to harsh municipal construction, farmland and small quarry working conditions: continuous engine high-frequency vibration, ultra-high exhaust pipeline temperature, mud splash and all-weather rain exposure. Dual sampling tube + integral fluorine rubber seal + fully sealed 4-pin plug triple shockproof & leakproof structure thoroughly solves common failures such as pipeline exhaust leakage, signal loss and intermittent power limitation fault codes stored in ECU. Sensor Type: EGR exhaust gas differential pressure transducer. Matching Engine: Yanmar 3TNV88, 4TNV84, 4TNV88 Tier 4 final electronic injection diesel engine. Core Compatible John Deere Excavators. 50G, 50P, 60G, 60P, 75G, 85G compact crawler excavators. Core Compatible John Deere Loaders. 210L, 312GR, 314G, 316GR, 318G, 320E, 331G skid steer & wheel loaders. Extended Compatible Equipment: 3032E, 3038E compact tractors, 7400A lawn mowers. Connector: 4-pin Molex black fully sealed waterproof plug (power, ground, signal A, signal B four independent pins). Measuring Range: 0-50kPa EGR differential pressure. Supply Voltage: DC 5V regulated power supply from engine ECU. Output Signal: Linear 0.5-4.5V analog voltage signal. Sampling Pipe Material: Anti-corrosion stainless steel, resistant to high-temperature exhaust ash. Built-in Seal: High temperature fluorine rubber O-ring, resistant to exhaust gas & 130? Heat. Protection Grade: IP67 dustproof, waterproof, exhaust corrosion & high temperature resistant. Ambient Operating Temperature: -40? +125? Engine compartment environment. Vibration Resistance: 18G continuous mechanical vibration tolerance. Response Time:? 1ms instant differential pressure signal feedback. Installation: Dual air tube connected to EGR pipeline inlet & outlet, plug-and-play direct replacement. Full Compatible Equipment List. Core Matching John Deere Compact Excavators. 50G, 50P, 60G, 60P, 75G, 85G small crawler excavators. Core Matching John Deere Loaders. 210L, 312GR, 314G, 316GR, 317G, 318G, 320E, 331G skid steer loaders. 3032E / 3038E compact tractors, 7400A series lawn mowers with Yanmar Tier 4 engine. Farmland renovation, municipal road reconstruction, residential foundation excavation, landscaping fine grading, small quarry stone loading and indoor narrow-space construction. Suitable for bulk wholesale to construction machinery repair shops, John Deere Yanmar engine spare parts distributors and small equipment leasing fleets. Strictly manufactured according to John Deere OEM differential pressure calibration and dimensional standards, 100% interchangeable with original factory MIU802948 / SNP48737 sensor. Dual sampling tube size, 4-pin Molex plug pin definition perfectly fit Yanmar Tier4 EGR pipeline mounting seat, direct drop-in replacement without structural modification. High-precision piezoresistive differential pressure chip with full-range temperature compensation, stable linear signal output without drift under low temperature, long-time construction vibration and exhaust ash pollution, realize precise EGR flow control and reliable emission over-limit power protection. Anti-corrosion stainless steel dual sampling tube + integral fluorine rubber high-temperature exhaust seal + fully sealed 4-pin Molex waterproof plug triple shockproof & leakproof structure, anti-exhaust gas leakage and circuit short circuit under bumpy construction vibration. Internal full vacuum epoxy encapsulation isolates high-temperature exhaust heat to prevent chip burnout and complete signal loss, service life far longer than low-cost generic EGR differential pressure sensors. Every finished EGR differential pressure sensor undergoes pressure linearity calibration, voltage accuracy testing, high-low temperature cycle aging, vibration durability and air tightness inspection, uniform stable quality for mass bulk orders. Standard dual air nozzle design simplifies disassembly and replacement steps, drastically shorten John Deere small excavator & skid steer loader engine maintenance downtime and reduce construction production loss caused by abnormal EGR differential pressure signal. Common Faults Solved by MIU802948 EGR Differential Pressure Sensor. Machine dashboard emission fault warning light always on, John Deere Service Advisor pops up EGR differential pressure circuit abnormal fault codes. Engine power drops obviously under digging/loading load, machine frequently trigger emission limited power limp mode. Cold start thick black smoke, fuel consumption surges sharply, exhaust NOx emission exceeds standard, fail environmental inspection. EGR valve frequent abnormal opening & closing, engine severe shaking, unstable idle speed during low-temperature startup. Internal chip burnout or 4-pin plug terminal oxidation leads to complete loss of differential pressure signal, EGR system completely out of control, machine locked low power unable to work normally. 1 × Complete MIU802948 EGR Exhaust Gas Differential Pressure Sensor Assembly. (Stainless steel dual pressure sampling tube + built-in fluorine rubber exhaust-proof sealing ring + original standard 4-pin Molex black waterproof buckle plug). Flexible MOQ, factory direct competitive wholesale prices available.