Upstream and Downstream Oxygen Sensor Replacement for XA XB Echo

In this review the reviewer looks at a 2-piece upstream and downstream oxygen sensor replacement kit intended for Toyota XA/XB 2004-2006 and Echo 2003-2005 with the 1.5L L4 engine. The bottom line: this kit is best for owners who need a direct-fit, budget-friendly sensor pair to restore normal emissions control and fuel trim behavior. Installation is straightforward for anyone with basic hand tools, and the sensors use reference numbers that match common OE replacements, making compatibility the single biggest reason to consider this set.

Key Features

• Direct fitment: Designed to fit XA/XB 2004-2006 and Echo 2003-2005 1.5L engines, which reduces compatibility guesswork during purchase.
• OE reference matching: Cross-referenced to multiple OE numbers so owners can confirm fit against existing part numbers on their vehicle.
• Upstream and downstream pair: Sold as a two-piece set so both sensors can be replaced at once to restore emissions sensing and fuel trim consistency.
• Improved fuel economy: A fresh sensor can help the engine manage air-fuel ratios more accurately, which may reduce fuel consumption when the old sensor had drifted.
• Simple installation: The sensors are constructed for bolt-in replacement and can be installed with common tools, letting a competent DIYer handle the job.
• Warranty support: The product includes a six-month warranty and customer response within 24 hours for issues.

Who It's For

This kit is aimed at owners of Toyota XA/XB (2004-2006) or Echo (2003-2005) with the 1.5L L4 engine who need a like-for-like replacement for failing oxygen sensors and want to address check engine lights, rough idle, or poor fuel economy. It is a practical option for DIY mechanics or independent shops that prefer replacing both upstream and downstream sensors together.

It is less appropriate for those who require OEM-branded parts with extended factory-backed warranties or drivers who need long-term commercial warranties; also, if a vehicle has additional diagnosis pointing to exhaust leaks or wiring faults, those issues should be resolved before swapping sensors.

Pros & Cons

Pros

• Good fit for specified XA/XB and Echo models thanks to multiple OE reference numbers.
• Replacing both sensors at once helps stabilize fuel trim and emissions readings.
• Reasonable value compared with buying individual OEM sensors.
• Six-month warranty and responsive customer support are included.

Cons

• Some users reported mixed long-term reliability, with a few units failing after a short period.
• Not an OEM-branded part, so warranty and longevity may be shorter than factory sensors.

Specifications

Fitment	XA/XB 2004-2006 L4-1.5L; Echo 2003-2005 L4-1.5L
Included pieces	Upstream and downstream oxygen sensors (2 pcs)
Reference numbers	Examples: 89465-52190, 250-24489, 250-24298 (multiple OE refs)
Function	Controls exhaust emissions and improves engine fuel combustion quality
Material	High-quality, environmentally friendly materials (manufacturer stated)
Warranty	Six-month limited warranty with 24-hour customer response

Our Verdict

For owners of XA/XB and Echo models with the 1.5L engine who need a cost-effective, direct-fit replacement, this two-piece oxygen sensor kit is a sensible choice. It restores proper emissions sensing and can improve fuel economy when the original sensors have aged, and the included warranty provides modest protection. Those seeking OEM longevity should weigh that against the lower upfront cost.

Frequently Asked Questions

Will these sensors fit my vehicle?
They are designed for XA/XB 2004-2006 and Echo 2003-2005 with the 1.5L L4; confirm by matching your existing sensor reference numbers to the provided list.

Are both upstream and downstream sensors included?
Yes, the kit includes two sensors so you can replace both positions at once.

What warranty is provided?
The product comes with a six-month warranty and the seller promises a response within 24 hours for support.