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Core Specs and 2026 Compliance

Specs first — the short version of the 2026 data sheet:

• Motor: 12V DC permanent magnet, ferrite core, stall torque ≥ 8.5 N·m
• Thermal protection: PTC thermistor trips at 120°C, auto-resets within a 15–30 second cooldown (SAE J1888)
• Sealing: IP54 on the motor body and bearing
• Connector: OEM-equivalent 2-pin or 4-pin by model year — no splicing on 95% of listed applications
• Compliance: SAE J2344, ISO 26262 ASIL-A, RoHS 3, REACH

It also meets 2026 right-to-repair mandates — U.S. Executive Order 14036 and the EU Data Act — via standardized OEM pinouts and traceable DTC mapping. The interface runs CAN-bus 2.0B natively and tolerates CAN-bus 3.0 signal arbitration on retrofit gateway modules.

Three Material Upgrades, Three Fixed Failure Modes

1. Gear housing: glass-fiber PBT instead of nylon

OE motors used a nylon 6/6 gear cassette that softens at 90–100°C, so a hot motor binds its own gears — the classic stuck-window failure and root cause of DTC B1310. The Koeep housing is 30% glass-fiber-reinforced PBT, rated 150°C continuous and UL94 V-0 flame class.

2. Copper-graphite brushes, diamond-turned commutator

Brush wear normally ends a DC window motor. The 2026 brush is sintered copper-graphite — 85% Cu, 12% C, 3% MoS₂ — on a commutator turned to under 0.005 mm runout. Ford OE managed about 25,000 full cycles, Denso about 20,000; this motor is rated past 50,000.

3. IP54 double-shielded ball bearing

OE armatures spun in porous bronze bushings. Water in Bronco and F-Series door cavities corrodes them, pushing ground-path resistance past 500 mΩ and setting DTC B1302. The Koeep unit uses a double-shielded 608-2RS ball bearing, sealed to IP54.

Specification Matrix: Koeep 2026 vs. OE Benchmarks

Every value comes from the 2026 technical data, benchmarked against Ford/Motorcraft part F4TZ-1523394-A and the Denso unit used in the Mazda B-Series.

OE Part Numbers It Replaces

Ford discontinued F4TZ-1523394-A in 2018; Mazda retired UH71-58-580A in 2015. What remains is NOS stock, when you can find it. The Koeep motor cross-references to:

• Ford F4TZ-1523394-A, E7TZ-1523394-A, D3TZ-1523394-A, C5TZ-1523394-A
• Mazda UH71-58-580A and UH71-58-580
• Cardone 42-309, Dorman 742-309, ACI 84028

Behind those numbers: over 12 million F-Series trucks built 1965–1997 plus roughly 400,000 B-Series and Navajo units — more than 3 million vehicles still in service as of 2026. Koeep projects production of this SKU through 2030, with a 5-year NLA contingency stock beyond that.

Diagnose Before You Order

Scan before you replace. On 1996 and later vehicles use OBD-II; on pre-1996 Fords use EEC-IV flash codes. Three codes matter:

• B1302 — Right Front Window Motor Circuit Fault: open circuit, short to ground, or resistance above 500 mΩ. On 1980–1996 F-Series and Broncos, check the door-jamb harness — the rubber boot degrades and the wires fracture.
• B1310 — Right Front Window Motor Overcurrent: more than 18 A under load — worn gear cassette, dry regulator tracks, or a binding channel seal. Fit the new motor and lubricate the regulator with lithium NLGI #2 grease.
• B1300 — Power Window Master Switch Circuit: often misread as a bad motor. Verify 12V at the motor connector before condemning it.

No body-control-module codes on your year? Measure between the motor ground pin and battery negative under load — anything above 0.3V is a ground-side fault, not the motor.

The 3-Step Differential Test

1. Direct power. Unplug the motor, apply fused 12V to the terminal and ground to the body. Runs both directions? The motor is fine — look upstream.
2. Voltage drop, loaded. Back-probe the power wire and command down. Below 10.5V means resistance in the switch contacts or harness; 1980–1996 Ford switches carbonize — clean with DeoxIT D5 or replace.
3. Clamp meter. Stall current over 20 A: mechanical bind or internal short. Under 8 A with no movement: open armature winding — replace the motor.

Installation Notes

For 95% of applications this is plug-and-play — the connector matches the factory 2-pin or 4-pin layout. Two cases need extra attention.

Manual-to-power conversion, 1973–1979 trucks

The motor bolts to the power window regulator used on 1973–1979 dentside F-Series. A conversion needs four things:

• A power window regulator for your door shell
• The door wiring harness with switch connector
• A 30A circuit breaker at the fuse panel
• The window motor itself

If the door shell lacks the wiring pass-through grommet, a 25mm hole saw and a rubber grommet kit finish the job.

Clear the codes properly

On 1996 and later OBD-II vehicles, clearing B1302, B1310, and B1320–B1329 position codes takes a KOEO cycle — key on, engine off — plus three full up/down actuations so the module relearns its current-draw baseline. Ford documents this in TSB 96-15-11; the Mazda B-Series procedure is TSB 09-001/96.

Pair the Motor With the Right Supporting Parts

A new motor on a worn regulator lives a short life. If the tracks are dry or the sector gear is worn, replace both together — on a 1993–2011 Ranger, the matching front right RH power window regulator with motor covers the whole assembly in one order.

Running a second-generation Explorer? That takes a different unit — the 2002–2010 Explorer rear passenger regulator with motor. For everything else on the build, start at the Koeep one-stop parts collection.

Refreshing the cabin too? The 5D carbon fiber center console sticker guide covers the cosmetic side of a Ford interior.

Ordering and Support

Need a fitment check first?

Borderline year or swapped door hardware? Send the details and the team matches the exact part before you order:

• Request-for-quote page — best for unusual fitment questions
• support@koeep.com — email the support desk
• WhatsApp — fastest for a quick answer

Frequently Asked Questions