What TM4 makes

TM4 Inc., which markets as Dana TM4, designs and manufactures electric motors, power inverters, and integrated propulsion systems for electric and hybrid vehicles. The motor range spans permanent-magnet synchronous (PMSM), synchronous reluctance and IPM, and induction machines in both low-voltage (24 to 144 Vdc) and high-voltage (150 to 800 Vdc) classes. Named motor families include the SRI 300, SRI 200, SYR 200, ASY 200, and the compact IPM 200 and IPM 120, covering peak power from a few kilowatts up to 400 kW and torque up to 730 Nm.

The inverter line pairs with those motors and runs from low-voltage units (the LVI400, Schwarzmuller, SmartMotion, and Tautronic families, 24 to 144 V) to the high-voltage HVI300 series, which the company rates to 900 Vdc and a functional-safety level of ASIL D. TM4 also sells complete motor-and-inverter systems: the TM4 MOTIVE integrated drive for passenger cars and light commercial vehicles, and the TM4 SUMO LD, MD, HD, and HP families for commercial vehicles, buses, and off-highway machines. The largest SUMO systems reach 540 kW peak and 4,000 Nm and interface directly with standard axles, a direct-drive approach the company positions for class 4 through heavy-duty platforms. An ePTO SUMO variant drives hydraulic pumps for auxiliary work.

End markets, per the company's own materials, cover light vehicles, commercial trucks and buses, material handling, construction, mining, and specialty electric vehicles, plus marine, rail, motorsports, and recreational applications. The technology rests on more than 30 years of research and over 75 registered patents, according to the company.

Ownership and history

TM4's roots run to 1982, when engineers at Hydro-Quebec's IREQ research institute began work on an in-wheel electric motor. Technologies M4 Inc. (TM4) was formally founded in 1998 as a Hydro-Quebec subsidiary, and through the 2000s it built prototype powertrains for OEMs including PSA, Tata Motors, and Volvo Trucks. In 2012 TM4 formed a Chinese joint venture, Prestolite E-Propulsion Systems (PEPS), and launched its SUMO heavy-duty systems; Chinese bus orders followed, with production in Beijing from 2014.

The ownership shifted in 2018, when Dana Incorporated (NYSE: DAN) and Hydro-Quebec announced a joint venture in which Dana became majority shareholder of TM4 for CA$165 million (about US$127 million), with Hydro-Quebec retaining a 45 percent interest. In 2019 Hydro-Quebec invested a further $85 million, the businesses were rebranded Dana TM4, and Dana folded in Italy's SME group (founded 1974) and the UK's Ashwoods Electric Motors, both low-voltage specialists that complement TM4's high-voltage line. In 2026 Dana acquired the remaining shares held by Hydro-Quebec, making TM4 a wholly-owned subsidiary of Dana Incorporated. Headquarters and the main technology center remain in Boucherville, Quebec.

Manufacturing footprint

TM4 operates manufacturing and engineering across six sites in five countries. The Boucherville, Quebec headquarters houses R&D, motor and power-electronics engineering, and final assembly and test. Production and low-voltage work run out of Arzignano, Italy (the former SME operation); two China sites in Shanghai and Weifang (the latter operating as Dana Electric Motor Co. Ltd, formerly PEPS); a roughly 50,000-square-foot plant in Pune, India, opened from 2020 for motors, inverters, and vehicle control units; and a newer electrodynamics facility in Amal, Sweden, a roughly $50 million investment begun in 2021 that received about $10.7 million in Swedish development support. Each facility, per the company, is equipped for high-volume final assembly and end-of-line functional and performance testing.

Certifications and quality

TM4 publishes a Dana Incorporated Quality, Health and Safety, and Environmental policy, signed by Dana's chairman and CEO and dated February 2022, committing to a zero-defect approach and continuous improvement. As a direct supplier to automotive and commercial-vehicle OEMs, TM4 works to the sector's production part approval and quality-management expectations; IATF 16949 is the automotive norm, and third-party sources report Dana Incorporated holds that certification. A TM4-specific, dated certificate was not found on the company's own site, so the quality system is reported here as a claim rather than a verified certificate.

Known customers

Most of TM4's programs are unnamed, as is normal for a propulsion-systems supplier. The relationships on the public record:

Sourcing evidence

TM4's US ocean-import footprint is thin, which fits a Canada-headquartered component maker whose main flows move inter-company and by modes other than sea. US customs bill-of-lading records show a small number of sea shipments to its US entity, most recently in April 2025, drawn from electronics and component suppliers in China. The record for its Canadian entity is more telling about structure: its recurring foreign shippers include Prestolite Electric Beijing and Dana Shandong Electric Motor, formerly Prestolite E-Propulsion (PEPS), which is TM4's own Chinese subsidiary. In other words, the customs graph reflects intra-group movement of motors and sub-assemblies from its China plants rather than arm's-length procurement.

Coverage caveats: these are ocean-freight records only. Air, truck, and rail movements, including most cross-border North American flows, 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. For buyers weighing nearshoring and tariff exposure, the relevant fact is footprint: TM4 builds in Canada, Italy, China, India, and Sweden, giving OEMs several regional options for electric-drive sourcing.

Frequently asked questions

What does TM4 make?

TM4 Inc. (Dana TM4) makes electric motors, power inverters, and integrated motor-and-inverter systems for electric and hybrid vehicles. Products range from low-voltage motors and inverters to high-voltage systems such as the TM4 MOTIVE integrated drive and the TM4 SUMO family, which reaches 540 kW peak power for commercial and off-highway vehicles.

Who owns TM4?

TM4 is a wholly-owned subsidiary of Dana Incorporated (NYSE: DAN). Dana became majority owner in 2018 through a joint venture with Hydro-Quebec, the founding parent, and acquired the remaining Hydro-Quebec shares in 2026. The company operates under the Dana TM4 brand.

Where is TM4 headquartered?

TM4 is headquartered in Boucherville, Quebec, Canada, where it also runs its main technology center and R&D. It operates additional manufacturing sites in Arzignano, Italy; Shanghai and Weifang, China; Pune, India; and Amal, Sweden.

How many employees does TM4 have?

TM4 has an estimated 600 to 1,000 employees worldwide. Company materials describe a workforce of over 500 specialists, while third-party workforce databases put the figure closer to 600 to 1,000 across its six global sites. TM4 does not publish an official headcount.

Who are TM4's customers?

TM4 supplies electric-vehicle OEMs and off-highway manufacturers. Documented relationships include Zero Motorcycles, Chinese bus and truck manufacturers who have deployed more than 12,000 TM4 SUMO powertrains, and historical prototype work for PSA, Tata Motors, and Volvo Trucks. Most programs are unnamed.

What certifications does TM4 hold?

TM4 publishes a Dana Incorporated Quality, Health and Safety, and Environmental policy dated February 2022 and operates as an automotive-grade supplier, where IATF 16949 is the sector norm. A TM4-specific dated certificate was not available on the company's own site, so its quality system is reported here as a claim.

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