Maxfavor Oxygen Sensor Kit for Toyota Tundra & Sequoia 4.7L (4-Piece) — OE-fit upstream and downstream replacements

MAXFAVOR 4-piece oxygen sensor kit replaces upstream 234-4169 and downstream 234-4162 sensors for Toyota Tundra (2000–2002) and Sequoia (2001–2004) 4.7L 4WD engines.

This complete sensor set gives you the four oxygen sensors commonly required when repairing or restoring the exhaust sensing system on select Toyota V8 models. The kit includes two upstream (pre-catalyst) and two downstream (post-catalyst) sensors built to match OE thread and connector patterns listed in the fitment references. It’s intended as a direct-fit replacement when your vehicle shows sensor-related codes or when performing a thorough exhaust tune-up.

How do these sensors match my Toyota’s original equipment?

MAXFAVOR sensors are manufactured to correspond with the referenced OE part numbers and connector styles so they install in the same locations as factory units. The listing includes multiple OEM cross-references to help you confirm compatibility before purchase.

• Upstream part number reference: 234-4169 (x2).
• Downstream part number reference: 234-4162 (x2).
• Cross-reference OEM numbers included for visual verification.
• Designed for Toyota Tundra 2000–2002 and Sequoia 2001–2004 4.7L 4WD.

What should I check before I install the replacement sensors?

Before installing, compare the new sensors to your removed units for thread size, connector type and wire length. Also verify your vehicle year and drivetrain against the fitment notes to avoid mismatch; many Toyota models use similar-looking sensors that are not interchangeable.

• Confirm sensor plug matches your vehicle’s wiring harness.
• Check thread profile and gasket/seat type visually.
• Clean the threaded port to ensure a proper seal before installation.
• Compare wire routing to avoid heat or chafe points.

How do I install the MAXFAVOR oxygen sensors safely?

Installation is straightforward with basic tools and a proper socket: remove the old sensor, clean the port, and hand-start the new sensor to avoid cross-threading. Tighten just enough for a secure seal, route the wiring away from hot components, then reconnect the electrical plug and clear any diagnostic codes as needed.

• Step 1: Locate and remove old sensor with an oxygen-sensor socket.
• Step 2: Compare new vs old sensors to confirm fit and orientation.
• Step 3: Clean threads and install sensor, tightening to spec.
• Step 4: Reconnect harness, secure wiring, and clear codes if present.

What warranty or return options come with this kit?

MAXFAVOR accepts returns if the sensors don’t fit your vehicle—items should be clean and returned in good packaging. If you have questions about fitment, contact the seller for assistance; they aim to respond within 24 hours.

• Return accepted for incorrect fitment with clean, well-packaged item.
• Seller support available for fitment confirmation prior to purchase.
• Fitment guidance includes multiple OEM cross-references and pictures.
• Follow local disposal rules for used sensors and packaging.

Who is this for: This four-piece MAXFAVOR oxygen sensor set is suited for DIY mechanics, independent repair shops and fleet owners working on Toyota Tundra (2000–2002) or Sequoia (2001–2004) with the 4.7L 4WD engine who need a full upstream/downstream replacement. Choose this kit when you’re addressing multiple sensor codes, replacing sensors during exhaust service, or completing a comprehensive emissions-related repair where matching all four sensors at once saves labor and ensures consistent readings across the system.