/live/media/BS/BS_18191_Fro.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
Bosch 18191 Oxygen Sensor - Downstream or Downstream Right
| Brand | Bosch 18191 |
|---|---|
| Position | Downstream |
| Product line | Bosch Engineered Oxygen Sensor |
| Fits | Ford · 6 vehicles |
Direct fit. Standard replacement oxygen sensor installs with a threaded mount.
Heated narrow-band design. Helps deliver quicker closed-loop operation and stable combustion control.
OE-proven quality. Backed by Bosch's long history of oxygen sensor development.
Cross-references FR3Z9G444A for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bosch Oxygen Sensor for Ford Applications
Bosch Engineered Oxygen Sensor 18191 is a direct-fit, heated narrow-band O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for select Ford Mustang and Ford E-350 Super Duty applications.
Key Features
- Direct-fit oxygen sensor with specific vehicle application coverage
- Heated narrow-band design for faster closed-loop operation
- 4-wire configuration with square female connector
- Threaded mounting with 18 mm thread diameter and 22 mm hex size
- Metal housing with high-temperature-resistant construction
- Wiring harness included with 29 in harness length and 31.5 in sealing-surface-to-connector length
Product Details
Bosch 18191 is part of the Bosch Engineered Oxygen Sensor line, a product family developed from Bosch OE oxygen sensor engineering and refined through narrow-band planar sensor technology. This sensor uses advanced ceramic elements and optimized heater control to deliver accurate lambda feedback and consistent operation under thermal and vibration stress. It is a standard replacement oxygen sensor for downstream locations on select Ford vehicles, including the 2015-2017 Ford Mustang and 2016-2017 Ford E-350 Super Duty. This part cross-references Ford FR3Z9G444A for the same application.
What It Helps Address
- Check engine light related to oxygen sensor performance
- Incorrect air-fuel mixture readings sent to the ECU
- Delayed closed-loop fuel control after startup
- Rough combustion control caused by aging downstream sensor output
- Emissions test failures tied to sensor response issues
Installation Notes
Verify the downstream position and connector style before installation. This Bosch 18191 oxygen sensor uses a threaded mount, 4-wire harness, and square female connector, so matching the original connector and thread size is important for proper fitment. Confirm the vehicle build date for 2017 Ford E-350 Super Duty applications, since coverage differs between downstream and downstream right positions.
Quality Assurance
Bosch has more than five decades of OE oxygen sensor development and supplies aftermarket sensors built to OE-proven standards. Bosch Engineered Oxygen Sensor 18191 is manufactured for consistent signal accuracy, heater performance, and durability in demanding exhaust conditions.
| Year | Make | Model | Transmission | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2017 | Ford | E-350 Super Duty | — | 6.8L | V10 | — | Downstream | To 11/2016; Bosch Engineered Oxygen Sensor |
| 2017 | Ford | E-350 Super Duty | — | 6.8L | V10 | — | Downstream Right | From 12/2016; Bosch Engineered Oxygen Sensor |
| 2017 | Ford | Mustang | Automatic | 5.0L | V8 | — | Downstream | Bosch Engineered Oxygen Sensor |
| 2016 | Ford | E-350 Super Duty | — | 6.8L | V10 | LPG | Downstream | Bosch Engineered Oxygen Sensor |
| 2016 | Ford | Mustang | Automatic | 5.0L | V8 | — | Downstream | Bosch Engineered Oxygen Sensor |
| 2015 | Ford | Mustang | Automatic | 5.0L | V8 | — | Downstream | Bosch Engineered Oxygen Sensor |
| No rows match your filter. | ||||||||