Bosch 17307 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17307 is an Actual OE Oxygen Sensor built as a wideband air-fuel sensor for precise mixture feedback to the engine control unit. It is a specific-fit, heated replacement for select applications and is listed for 2006-2008 Porsche 911 upstream positions.

For Porsche 911 owners searching for an upstream wideband O2 sensor, Bosch 17307 provides OE-style fitment and sensor response for accurate air-fuel ratio monitoring. Bosch’s wideband A/F sensor design uses a planar pump-cell layout and fast heater control to deliver detailed lambda readings across the operating range.

Key Features

• Wideband air-fuel oxygen sensor for continuous ratio measurement
• Heated design for faster light-off and stable operation
• Specific fit replacement for select vehicles
• 5-wire harness with included wiring harness
• Blade terminals, oblong connector, male connector and terminal ends
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with robust ceramic sensor construction
• Fits 2006-2008 Porsche 911, upstream
• Bosch part number 17307

Product Details

Bosch Actual OE Oxygen Sensor 17307 is engineered for vehicles that rely on wideband feedback for precise fuel control. Unlike a traditional switching sensor, this wideband sensor provides continuous measurement across the full lambda range, giving the ECU more detailed data for air-fuel management. That helps maintain accurate mixture control during load changes, warm-up, and steady-state driving. Bosch developed the original wideband A/F oxygen sensor architecture, and this aftermarket replacement reflects that OE development background for the 2006-2008 Porsche 911 upstream application. Interchange reference: this part cross-references Porsche 99760616802 for the same application.

Common Issues This Sensor Can Address

• Fault codes related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle or drivability concerns tied to inaccurate exhaust feedback
• Reduced fuel economy caused by poor mixture control
• Emissions test failures linked to sensor response problems

Installation Notes and Tips

Confirm the upstream location and connector style before installation. This Bosch 17307 oxygen sensor uses a threaded mount, 18 mm thread size, and a 19.7 in wiring harness length with an overall length of 23.0 in. Inspect the exhaust bung threads and connector routing before tightening the sensor, and verify the harness is secured away from heat sources and moving components.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience in engine management and emissions technology. The sensor is built to OE-level standards for accurate signal output, thermal durability, and dependable operation in demanding exhaust conditions.