Walker 245-1599 Mass Air Flow Sensor

Walker 245-1599 Mass Air Flow Sensor

Walker 245-1599 is a sensor-only mass air flow sensor for select Lexus and Toyota applications. It is built as a new, programmed, and tested replacement designed to restore accurate airflow measurement for proper engine management.

Walker Products’ Sensor Only line is focused on direct sensor replacement without the housing assembly. That makes it a practical choice when the original housing is serviceable and you want a faster, more economical repair path for Lexus RX350, Toyota Camry, Toyota RAV4, and other listed applications.

Key Features

• Sensor only design; housing not included
• Black finish with oblong male connector
• 4 terminals, 1 connector, 2 mounting holes
• Spade terminal type
• New, programmed, and tested before release
• Custom-tuned flow characteristics for the full airflow range
• Built to meet or exceed OE long-term fuel trim targets
• Made in Walker Products USA facilities on many high-demand applications

Detailed Description

This Walker mass air flow sensor is engineered for vehicles that rely on precise airflow data to manage fuel delivery and drivability. Part number 245-1599 is listed for a wide range of Lexus and Toyota models, including Lexus ES350, RX350, NX350, and Toyota Corolla, Highlander, Tacoma, and Sienna. If you are searching for a replacement MAF sensor for a 2018-2026 Lexus LC500 or a 2019-2026 Toyota Corolla, this sensor-only unit is built for that application.

Walker Products manufactures many of its high-demand MAF sensors in the USA using OEM-quality components and circuit boards. Each unit is production tested and verified with on-vehicle testing to confirm fit, form, and function. This part cross-references 2220475040 for the same application.

What It Helps Address

• Rough idle caused by inaccurate airflow readings
• Hesitation or poor throttle response
• Fuel trim issues related to a failing MAF sensor
• Check engine lights tied to airflow measurement faults
• Reduced drivability from contaminated or aging sensor elements

Installation Notes and Tips

Confirm the connector shape, terminal count, and mounting style before installation. Because this is a sensor-only replacement, inspect the existing housing, connector air tubes, and intake tract for dirt, oil residue, or damage before transferring the new sensor. Avoid touching the sensing element during installation, and verify the intake system is sealed after service.

Compatible With: 2018-2026 Lexus LC500, 2016-2026 Lexus RX350, 2023-2026 Lexus RX350h, 2024-2026 Lexus RX450h+, 2023-2026 Lexus RX500h, 2024-2026 Lexus TX350, 2024-2026 Lexus TX500h, 2024-2026 Lexus TX550h+, 2019-2026 Toyota Corolla, 2025-2026 Toyota Crown Signia, 2023-2026 Toyota GR Corolla, 2024-2026 Toyota Grand Highlander, 2017-2026 Toyota Sienna, 2021-2025 Lexus ES250, 2019-2025 Lexus ES300h, 2019-2025 Lexus ES350, 2022-2025 Lexus IS500, 2018-2025 Lexus LC500h, 2018-2025 Lexus LS500, 2018-2025 Lexus LS500h, 2022-2025 Lexus NX250, 2022-2025 Lexus NX350, 2022-2025 Lexus NX350h, 2022-2025 Lexus NX450h+, 2015-2025 Lexus RC F, 2017-2025 Toyota Highlander, 2020-2025 Toyota RAV4, 2018-2024 Toyota Camry, 2022-2024 Toyota Corolla Cross, 2020-2024 Toyota Hiace, 2021-2024 Toyota Mirai, 2021-2024 Toyota RAV4 Prime, 2021-2024 Toyota Venza, 2023 Toyota Hilux, 2015-2019 Toyota Hilux, 2016-2023 Toyota Tacoma, 2021-2023 Toyota Yaris, 2018-2022 Lexus RX350L, 2016-2022 Lexus RX450h, 2018-2022 Lexus RX450hL, 2019-2022 Lexus UX200, 2019-2022 Toyota Avalon, 2018-2022 Toyota C-HR, 2016-2020 Lexus GS F, and 2019 Toyota RAV4 from 11/2018.

Quality Assurance

Walker Products has supplied fuel system components since 1946 and is an ISO 9001 and IATF 16949 certified manufacturer. The 245-1599 MAF sensor is new, programmed, and tested for fit, form, and function before release.