GM says MP Materials now makes EV motor magnets in Texas

The present-day claim is the interesting part. In 2021, GM signed a long-term agreement with MP Materials as part of a wider push to develop a US supply of automotive-grade permanent magnets. At that point, Amin says, MP was running Mountain Pass, which he describes as North America's only active, large-scale rare earth mining and refining site, and was working toward a fully integrated magnetics business. GM became the foundational automotive customer for MP's Independence facility in Fort Worth, Texas.

Five years later, he says, MP is producing automotive magnets at Independence, while GM engineers test and validate them in electric motors at labs in Pontiac, Michigan. The Dallas Morning News reported on September 24 that MP had delivered its first prototype magnets to GM for testing in vehicles including the Chevrolet Equinox EV, GMC Sierra EV and Chevrolet Corvette Grand Sport X, with commercial shipments planned later in 2026. That gives a three-state path: rare earth material mined and refined in California, magnets made in Texas, motor development and validation in Michigan. Amin calls it a real-world example of GM's "buy where we build" approach.

What a foundational customer actually does

The phrase "foundational customer" carries a lot of weight in the column, so it helps to see how Amin uses it. As he tells it, the job is to give a supplier early clarity on demand, agree long-range plans, and put engineers from both sides in the same room to sort out the details of going from investment to industrial scale. In plain terms, a supplier building a new plant needs someone to promise it will buy what comes out, and a carmaker needs a supplier willing to meet its specifications before the first part exists.

Amin is candid that it was slow. GM knew, he writes, that it would be a multiyear journey before the first magnet was made. That fits the five-year gap between the 2021 agreement and the production he now reports. He says GM's commitment helped MP develop new manufacturing capability and a route to scale, and that GM in return gained a supplier that could make its operations sturdier, more competitive and more adaptable. Note the hedge in his wording: that is what the relationship could deliver, not a measured result.

Why the magnet is hard to make

Most GM EV motors today use interior permanent magnets, Amin says. The stator creates a rotating magnetic field that interacts with magnets inside the rotor to produce torque. Motors of this type generally offer strong efficiency and power density, which matters when engineers are chasing range, performance and packaging space.

To be called automotive grade, he adds, a magnet has to withstand extreme heat, vibration and mechanical stress while performing consistently. GM has also refined its own designs: in its current motor family, engineers moved from solid to segmented magnets to reduce heat buildup and energy loss. The point he is making is that a carmaker with that much motor experience knows exactly how hard it is to make such magnets reliably at scale, and so values a domestic source that can.

What the column does not tell us

This is a signed piece by a GM executive, so it should be read as the company's account, not an independent audit. It is a useful account, because it names a supplier, a plant, a city and a lab, and those details can be checked. But several things a reader would want are simply absent from the column.

The biggest gap in the column itself is a voice from MP Materials, though MP has said related things elsewhere. In a January 2025 filing, MP said Independence had started trial production of automotive-grade magnets and would supply GM and other manufacturers. The Dallas Morning News quoted MP chief executive James Litinsky as saying "we would not be here without GM," and reported that the first deliveries were prototype magnets, not full commercial supply. That is a notch more modest than the column's wording that MP is producing automotive magnets. We follow the more specific reporting here: prototypes are delivered and testing, with commercial shipments still ahead.

The column gives no production volumes, so we do not know whether Independence is making a pilot trickle or a meaningful share of what GM needs. MP's filing put the plant's eventual capacity at roughly 1,000 metric tons of finished magnets a year, with a gradual ramp that began in late 2025. There are no cost figures, so we cannot say whether these magnets are priced competitively with imports. The column does not say when the magnets will reach showroom models, or whether validation in Pontiac has finished. It also does not give contract terms, such as length or minimum purchases. We have left those out rather than guess, and they are the questions we would put to GM and MP Materials.

There is also a gap in the supply chain as described. Amin says the material is mined and refined in California and made into magnets in Texas. He does not say how much of the rest of the chain, such as processing steps between refined material and finished magnet, sits inside the United States. A "mine to magnet to motor" slogan is tidy, but the column gives the three endpoints, not every step between them.

Why this is a bigger story than one supplier

Rare earth magnets have become a policy subject as much as an engineering one, which is why this kind of column gets written at all. A carmaker that can point to a domestic source of a critical part can say it is less exposed to a single overseas supplier. Amin frames the benefit in those terms, resilience and flexibility, rather than in terms of price. That is a fair reading of why GM would invest, though it is the company's framing of its own strategy.

It also shows how long these projects take. By Amin's account, the agreement dates to 2021 and the first automotive magnets from the Fort Worth plant are only now in production, with testing still under way. MP's own January 2025 target was first deliveries by the end of that year, and the prototype handover reported in September 2026 came later than that. Anyone expecting a quick fix to supply chain risk from a new factory should note that timetable.

What to watch next: whether MP begins the commercial shipments it has pointed to for later in 2026, whether GM or MP publishes volumes and milestones, such as which motor programs have been validated, and whether GM names the first production vehicles to carry Texas-made magnets. Neither company has given a date for that last step.

If you drive a GM EV, would it change anything for you to know where the magnets in the motor came from, or only if it made the car cheaper?