Bosch 15337 Oxygen Sensor - Upstream Left

Bosch Validated Oxygen Sensor for Hyundai and Kia

Bosch Part Number 15337 is a specific-fit, narrow-band heated oxygen sensor for select Hyundai and Kia applications. It provides air-fuel ratio feedback to the ECU for stable closed-loop operation, accurate fuel control, and lower emissions.

Key Features

• Bosch Validated Oxygen Sensor, Part Number 15337
• Narrow-band heated O2 sensor with threaded mounting
• Specific fit with included wiring harness
• 4-wire design with oblong male connector and blade terminals
• 22 mm hex size and 18 mm thread diameter
• Steel finish with metal housing for demanding underhood conditions
• Fits upstream left positions on select Hyundai and Kia vehicles

Product Details

Bosch 15337 is built as a standard replacement oxygen sensor for vehicles that rely on precise upstream exhaust feedback. Bosch’s validated sensor line draws on decades of OE development, using ceramic sensing elements, controlled heater operation, and heat-resistant materials to maintain consistent signal quality during warm-up and normal driving. This helps the engine management system respond quickly and maintain accurate combustion control across changing load and temperature conditions.

Compatible With select 2006-2012 Hyundai and Kia models, including Hyundai Sonata, Hyundai Azera, Hyundai Santa Fe, Hyundai Veracruz, Hyundai Entourage, Hyundai Genesis Coupe, Kia Sedona, and Kia Amanti in the upstream left position. This part cross-references Monroe Shocks & Struts (e.g., 392103C100, 392103C820) for the same application. Bosch 15337 is a direct-fit oxygen sensor choice for drivers searching for a Hyundai Sonata upstream left oxygen sensor or a Kia Sedona narrow-band heated O2 sensor replacement.

Common Issues This Sensor Can Address

• Fault codes related to upstream oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Reduced fuel economy from poor closed-loop control
• Emissions test failures tied to sensor response issues
• Delayed sensor warm-up after cold starts

Installation Notes and Tips

• Confirm the upstream left location before ordering; this part is specific to that position.
• Match the 4-wire connector, terminal style, and thread size to the original sensor.
• Inspect the harness routing and connector condition before installation.
• Use the correct oxygen sensor socket for the 22 mm hex.
• Clear diagnostic trouble codes after installation and verify live data response.

Quality Assurance

Bosch backs this oxygen sensor with OE-focused engineering and validated aftermarket coverage. The design reflects Bosch’s long history in oxygen sensor development, including narrow-band and heated sensor technology used to support accurate engine control.