MOTOKU 4-Pin Oxygen Sensor Set for Ford Fiesta 1.6L Ti‑VCT (2011–2019) — Upstream & Downstream Pair, Direct-Fit

MOTOKU's two-piece 4-pin oxygen sensor set replaces both upstream and downstream sensors on Ford Fiesta 1.6L Ti‑VCT engines, restoring accurate air-fuel feedback for emissions and engine management.

This pair of OEM-style 4-pin oxygen sensors is built to match the electrical connector and sensing characteristics used on Ford Fiesta 1.6L Ti‑VCT models from 2011 through 2019. The kit includes one upstream (pre-cat) and one downstream (post-cat) sensor, allowing you to replace both critical sensors at once to clear check-engine codes related to O2 circuits, improve fuel trim response, and help the catalytic converter perform as intended. Both sensors use the specified 4-pin plug configuration and are offered as direct-fit replacements for multiple Ford part numbers.

Will these sensors fit my Ford Fiesta 1.6L Ti‑VCT?

Yes—this MOTOKU set is designed specifically for the 1.6L Ti‑VCT engine across a wide range of Fiesta body styles and years. Confirm your vehicle year and transmission type against the listed applications before ordering.

• Covers model years 2011–2019 across S, SE, SEL, SES, Titanium, ST Line, and ST variants
• Compatible with both automatic (A/T) and manual (M/T) transmissions where specified
• Both sensors use a 4-pin plug matching factory connectors for direct installation

What part numbers does this set replace?

The MOTOKU set is intended as a direct replacement for several common OEM and aftermarket numbers, simplifying cross-referencing at the parts counter. If your diagnostics or parts diagram lists any of the referenced numbers, this kit will typically work without modification.

• Replaces part numbers such as 234-4493, 234-4555, AE8Z-9G444-B and related OE codes
• Cross-references include AE81-9G444-BC, 250-24301, 350-34316, AE8Z-9F472-A/B
• Check your vehicle’s connector style—this set uses the 4-pin plug used by listed Ford codes

How do I know if I should replace both sensors at once?

Replacing both sensors together is often recommended when the upstream sensor shows age or fault codes, or when the downstream sensor has been exposed to catalytic issues. Swapping both ensures the engine control unit reads consistent signals and avoids immediate redo if the other sensor is near end-of-life.

• Replace both if you have persistent O2 sensor or catalytic converter codes
• Consider a pair when one sensor has failed and the other has high mileage
• Installing both reduces the chance of mismatched sensor outputs causing drivability issues

Are these sensors easy to install and what should I prepare?

Installation is straightforward for DIYers with basic tools and safety precautions. Use an oxygen sensor socket or wrench, allow the exhaust to cool, and disconnect the battery before unplugging sensors to prevent electrical issues.

• Wear gloves and eye protection; work on a cooled exhaust system
• Use anti-seize on threads if not pre-applied and tighten to manufacturer torque
• Clear codes with an OBD-II scanner after installation to verify operation

Who is this for: This MOTOKU 4-pin oxygen sensor set is for Ford Fiesta owners, mechanics, and independent repair shops looking for a direct-fit replacement for the 1.6L Ti‑VCT engine family (2011–2019). Choose this kit if you need both upstream and downstream sensors that match the factory 4-pin wiring, want straightforward bolt-in installation, and require cross-referenced compatibility with common Ford part numbers.

• Features:
  • Compatible with Ford Fiesta 1.6L Ti‑VCT Engine 2011–2019
  • Replaces Part Number: 234-4493, 234-4555, AE8Z-9G444-B, AE81-9G444-BC, 250-24301, 350-34316, AE8Z-9F472-A, AE8Z-9F472-B, AE8Z-9G444-C
  • Attention: Both sensors are 4-pin Plug.