What Walker Products makes

Walker Products manufactures engine management and fuel delivery components for the automotive aftermarket, commercial vehicle, and non-automotive markets. The catalog centers on engine sensors: oxygen sensors, mass air flow and manifold absolute pressure sensors, camshaft and crankshaft position sensors, knock sensors, throttle position sensors, engine coolant and air charge temperature sensors, variable valve timing solenoids, and ABS wheel speed sensors. Alongside the sensor lines it produces fuel injection and carburetor repair kits, oil pressure switches, ignition wire sets, ignition coils, and coil-on-plug boots. The company describes a range in the tens of thousands of unique part numbers, with broader descriptions citing more than 50,000 products covering over 90 percent of vehicles on the road.

The company positions its parts against original equipment fit, form, and function rather than as generic replacements. Its engineering group runs an in-house repair shop that fits parts on actual vehicles, maintains a library of genuine OEM samples for reverse engineering and quality control, and builds proprietary test equipment for validation. Beyond the automotive aftermarket, Walker serves commercial and heavy-duty vehicle fleets and an "Othermotive" segment covering snowmobiles, boats, motorcycles, UTVs, and farm machinery. It also offers custom manufacturing, including gasket stamping, PCB design, and engine sensor production for co-manufacturers.

Walker sells through OEM channels, co-manufacturers, traditional aftermarket distributors, rebuilders, and retail customers. As a Tier 2 style sensor and component supplier serving both OEM programs and the independent aftermarket, its coverage depth and application data are central to how distributors evaluate it.

Ownership and history

Walker traces its origins to 1946, when it began supplying fuel system components to the automotive industry, and it marks an 80th anniversary in 2026. The modern company took shape after 1985, when Michael G. Weaver invested in what was then a small carburetion component manufacturer in Los Angeles and grew it into a global manufacturer and distributor. Walker remains privately held and family owned and operated, and describes itself as one of the largest privately owned manufacturers of fuel system components and engine sensors.

Michael Weaver, who served as owner, president, and CEO, died in November 2022 after a battle with cancer. Grant Kitching, a long-tenured company executive, became President and CEO in September 2022, and Weaver's three sons remain part of the management team. In May 2023 the company acquired Kingsborne Wire Werks of San Marcos, California, a performance and custom ignition wire-set maker founded in 1971, adding ignition wire capability to its lineup. The corporate headquarters is at 525 West Congress Street in Pacific, Missouri, west of St. Louis.

Manufacturing and footprint

Walker operates manufacturing and distribution across seven locations on three continents. In the United States, it runs plants and distribution in Pacific, Missouri; Palmetto, Florida; Grand Junction, Colorado; and Fruita, Colorado, where its Screw Machine Specialties operation produces machined components. Internationally, it has a manufacturing and sales operation in Changzhou, Jiangsu, China, a sales and distribution center in Kings Norton, Birmingham, United Kingdom, and Walker Products de Mexico near Toluca in the State of Mexico.

The company reports around 400 team members and serves more than 1,400 customers worldwide. Its distribution network runs on real-time computerized inventory control and ships by air, sea, and ground to support order fill rates for OEMs, wholesale distributors, installers, retailers, jobbers, and co-manufacturers. This multi-plant, multi-country structure gives buyers both domestic production and lower-cost overseas manufacturing under one supplier, a factor relevant to nearshoring and dual-sourcing decisions.

Certifications and quality

Walker Products states that its manufacturing facilities maintain ISO 9001, ISO 14001, and IATF 16949 standards, and it posts certificate numbers for all three on its site (ISO 9001 US021061, ISO 14001 US020489, and IATF 16949 US021762). IATF 16949 is the automotive-specific quality management standard expected of OEM production suppliers, and ISO 14001 covers environmental management. The certificate issue dates are not published on the page, so these are reported as company claims.

The quality program is built around matching OEM specifications. Walker's engineering and research teams design and build proprietary and increasingly automated test equipment, run on-vehicle data logging and ECU decoding, and track technical service bulletins, recalls, and installer feedback to address known field issues. That testing discipline, applied through structured approval steps such as PPAP, is what distinguishes an OE-grade sensor supplier from a commodity packager.

Known customers

Walker Products serves OEMs, co-manufacturers, aftermarket distributors, rebuilders, and retail accounts, and reports more than 1,400 customers worldwide. It does not publicly name individual OEM customers, and no single customer relationship is documented in a regulatory filing or company announcement that meets a publishable evidence bar. As is normal for an aftermarket engine-management supplier serving OEM and co-manufacturing programs under confidentiality, the specific customer roster is not disclosed here.

Sourcing evidence

Walker Products appears in United States customs bill-of-lading records under its Pacific, Missouri entity with 196 sea shipments on record and a most recent shipment dated March 10, 2025. The named foreign suppliers are Chinese automotive-sensor manufacturers, including Zhejiang Aborn Automotive Sensor, Changsha Aosky Auto Parts, and Shanghai Gaosida International Trading. That import pattern, sensor components and sub-assemblies inbound from specialist Chinese sensor makers, is consistent with a company that both manufactures domestically and sources engine-sensor components internationally for its catalog. Two smaller sibling entities in Palmetto, Florida and Grand Junction, Colorado each show a single shipment, so the Pacific entity is the primary importer of record.

Coverage caveats apply. These are United States ocean-freight records only. Air, truck, and rail movements do not appear, some records name freight intermediaries rather than manufacturers, and product categories come from declared manifest codes, which are noisy. Absence of a record is not evidence of absence.

Frequently asked questions

What does Walker Products make?

Walker Products manufactures engine management and fuel delivery components, with a catalog centered on engine sensors: oxygen sensors, mass air flow and manifold absolute pressure sensors, camshaft and crankshaft position sensors, knock sensors, and throttle position sensors. It also makes ignition wire sets, ignition coils, coil-on-plug boots, fuel injection and carburetor repair kits, and oil pressure switches for automotive, commercial vehicle, and non-automotive applications.

Who owns Walker Products?

Walker Products is privately held and family owned and operated, and describes itself as one of the largest privately owned manufacturers of fuel system components and engine sensors. Michael G. Weaver led the company as owner, president, and CEO from 1985 until his death in November 2022. Grant Kitching became President and CEO in September 2022, and Weaver's three sons remain in the management team.

Where is Walker Products headquartered?

Walker Products is headquartered at 525 West Congress Street in Pacific, Missouri, west of St. Louis. It operates additional United States facilities in Palmetto, Florida, and Grand Junction and Fruita, Colorado, plus international operations in Changzhou, China; Birmingham, United Kingdom; and near Toluca, Mexico.

What certifications does Walker Products hold?

Walker Products states that its manufacturing facilities maintain ISO 9001, ISO 14001, and IATF 16949 certifications, and it posts certificate numbers for all three on its website. IATF 16949 is the automotive-specific quality management standard for OEM production suppliers. Certificate issue dates are not published, so these are reported as company claims.

How many employees does Walker Products have?

Walker Products reports around 400 team members across its facilities. Third-party databases vary widely, from a 501 to 1,000 band on one directory to under 100 on a broker profile, because they model headcount differently. The roughly 400 figure is the one associated with the company and its own press materials.

Who are Walker Products' customers?

Walker Products serves OEMs, co-manufacturers, aftermarket distributors, rebuilders, and retail accounts, and reports more than 1,400 customers worldwide. It does not publicly name individual OEM customers, which is standard for an engine-management supplier serving programs under confidentiality.

Last verified September 28, 2026. Is this your company? Request a correction.