Oxygen O2 Sensor 250-54084 Upstream & 250-24360 Downstream - Direct

In this review the Oxygen O2 Sensor 250-54084 Upstream & 250-24360 Downstream is evaluated for owners of 2.5L Toyota and Scion models who need a direct fit replacement. The bottom line: this two-piece set is for drivers who want an OE-compatible sensor pair that restores accurate air-fuel monitoring and can clear a check engine light, because it follows the listed replacement numbers and uses stainless steel and high temperature resistant materials to match original equipment performance. It is a practical choice when fitment and reliable functionality matter more than brand prestige.

Key Features

• Direct OE compatibility: Matches upstream and downstream replace OE numbers so it bolts into many Camry, RAV4, Scion tC and Lexus ES300h models without modification.
• Upstream and downstream pair: Sold as a two-piece set which covers both pre-catalyst and post-catalyst monitoring for a complete repair job.
• Durable construction: Made from stainless steel and high temperature resistant materials to withstand exhaust conditions and maintain sensor life.
• Engine performance support: Installed in the exhaust pipe to accurately detect air mixture and combustion conditions, helping optimize engine performance and fuel use.
• Fitment guidance: The listing emphasizes checking plug and sensor length before purchase, reducing risk of buying the wrong part for similar engine variants.

Who It's For

This set is best for DIYers and independent mechanics working on 2012-2018 Toyota Camry and RAV4 models, 2011-2016 Scion tC, or 2013-2018 Lexus ES300h with the L4 2.5L engine who need a cost-effective replacement that follows OE numbers. It appeals to those who want a practical repair that addresses check engine light codes related to oxygen sensors and air-fuel trim.

It is less suited for vehicles outside the listed fitment or for buyers who require factory-branded parts with extended warranty backing; also those who are not comfortable using professional disassembly tools should seek a shop to avoid damage during installation.

Pros & Cons

Pros

• Direct fit for specified Toyota, Scion and Lexus 2.5L models based on listed OE numbers.
• Sold as an upstream and downstream pair, so the entire monitoring circuit can be renewed at once.
• Materials and construction aimed at high temperature durability to match exhaust conditions.
• Customers report restored functionality and some note the check engine light was cleared after replacement.

Cons

• Fitment requires verifying plug length and sensor dimensions, so there is some risk if measurements are not checked beforehand.

Specifications

Brand	SYKRSS
Included parts	Upstream and downstream oxygen sensors (2PCS)
Compatible engines	L4 2.5L
Compatible models	Toyota Camry, Toyota RAV4, Scion tC, Lexus ES300h (specified years)
Replace OE numbers	Upstream: 1250-54084, 25054084, 350-64031; Downstream: 2250-24360, 25024360, ES20327
Construction	Stainless steel, high temperature resistant materials

Our Verdict

The SYKRSS Oxygen O2 Sensor pair is a pragmatic, value-focused option for owners of specified 2.5L Toyota, Scion and Lexus models who need a reliable, direct-fit replacement. It offers OE-number compatibility and durable materials, making it a sensible repair choice for restoring engine monitoring and addressing check engine light issues without paying for OEM branding.

Frequently Asked Questions

Will these sensors fit my Camry?
They fit Camry models equipped with the L4 2.5L engine from the listed years; check the OE numbers and plug/sensor length to confirm before buying.

Do I need both upstream and downstream sensors?
Replacing both is recommended when diagnosing persistent emissions or fuel trim issues, and this listing provides both sensors as a set.

Can I install these myself?
Yes if you have basic mechanical skills and proper tools, but wait for the exhaust to cool and take care not to damage threads; a professional can avoid fitment mistakes.