DENSO 234-1001 Oxygen Sensor 1-Wire Direct Fit Unheated O2 Sensor

The DENSO 234-1001 is a 1-wire, unheated, direct-fit oxygen sensor (O2 sensor / Lambda sensor) engineered to OE-identical standards for accurate exhaust gas monitoring and reliable closed-loop air/fuel mixture control. With a wire length of 14.57 inches, this thread-in sensor delivers a precise, first-time fit for a wide range of domestic and import applications.

Key Features:

• OE-Identical Construction: Manufactured and tested to the strictest original equipment standards for unparalleled performance and longevity
• Aluminum Oxide Trap Layer: DENSO's exclusive trap layer protects the ceramic element from silicone and lead contamination, preserving platinum electrode integrity
• Porous PTFE Filter: Blocks efficiency-robbing contaminants while maintaining proper sensor temperature for quicker response times
• Refined Zirconia Element: Delivers improved sensor response and more accurate air/fuel ratio readings across idle, moderate acceleration, and cruise conditions
• Rugged Stainless Steel Housing: Corrosion-resistant construction with robotic laser welds for durability in harsh exhaust environments
• Double-Protection Cover: Maintains optimal operating temperature and shields the ceramic element from fouling
• Direct Fit Design: Precision-built for exact replacement with a thread-in mounting style and 1-round-female wiring harness plug — no modifications required
• Voltage Output: 0–1V standard narrowband signal compatible with OBD-I and early OBD-II engine management systems

A faulty or miscalibrated oxygen sensor can negatively impact fuel economy, increase harmful emissions, and trigger a check engine light. The DENSO 234-1001 is sold individually and includes a wiring harness. Backed by a 1-year manufacturer warranty.