12V Starter Motor STG91202 for LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE]

Overview of the STG91202 Starter Motor

The STG91202 starter motor is a 12V, 1.4 kW unit built for LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE]. It is a reduction-gear starter with a pre-engaged solenoid, assembled to the original mounting flange and terminal positions so it fits without adapters or wiring changes.

Every unit is bench tested at the factory for current draw, solenoid pull-in and pinion throw, because those three values decide whether a starter works in a cold engine bay as well as it does on a test bench.

Specification Summary

• Rated voltage: 12V
• Rated output: 1.4 kW
• Pinion: 10 teeth
• Type: reduction gear starter with pre-engaged solenoid
• Application: LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE]
• Net weight: approximately 3.25 kg
• Condition: new, direct replacement for the original unit

A 12V 1.4 kW rating is the output the motor can hold while cranking, not a peak figure. It is sized so the engine reaches starting speed on the first or second revolution, which is what makes a healthy start feel immediate.

The reduction gearset lets the motor run at high speed while the pinion turns slowly with high torque, which is why the unit stays compact enough for a crowded engine bay.

Reference Numbers and Cross References

The reference family for this starter covers the numbers listed here:

• STG91202
• LX450
• 28100-66040
• 28100-66050
• 228000-1560
• 228000-3260
• 1FZ-FE
• 228000-3262
• 28100-66060
• 228000-1690

Where the label on the old starter has corroded, compare the pinion teeth, the mounting flange and the terminal bracket with the photographs before ordering. The number on the original unit is the reliable identifier. This starter is listed with 10 references in total.

Where This Starter Is Used

This starter is used across LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE] variants that share the same bell housing pattern. Where the original label is missing, the pinion tooth count and terminal position are enough to identify the correct unit. This applies in particular to the STG91202 supplied for LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE].

Vehicles that have had an engine or gearbox replacement may already carry a different starter from the one the catalogue expects, so treat the paperwork as a starting point rather than the final answer.

Common Failure Patterns

Most failures start at the solenoid contact. Each start switches the full cranking current through a copper disc, and after thousands of cycles that disc pits and burns. The result is the familiar single click with no rotation, or a delay before the motor turns.

The brush plate is the second common failure point. Brushes shorten gradually, spring pressure falls, and contact becomes intermittent. Cranking speed drops a little every week until the engine refuses to start on a cold morning. On LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE] installations, access to the STG91202 usually decides how long the job takes.

Symptoms of a Failing Starter

• Click from the solenoid with no rotation, sometimes clearing on a second attempt
• Cranking that has become slower over several weeks
• Grinding as the pinion meets the ring gear
• Starter that keeps running after the key is released
• Intermittent no-crank that appears when the engine bay is hot

Rule out the simple causes first: battery capacity under load, corroded terminals and the signal wire at the solenoid. A starter that clicks with a known-good battery and a clean signal circuit has an internal contact fault. Because the STG91202 reuses the original bolts and connectors, no adapters are needed on LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE].

Pre-Fit Checklist

• Condition of the old pinion and ring gear before the new unit goes in
• Main cable continuity and the condition of the lug at the starter stud
• Battery voltage while cranking, measured at the battery posts
• Mounting face cleanliness and bolt condition
• That the replacement terminal layout matches the original harness

Fitting a new starter onto a worn ring gear or a marginal battery shortens its life. Check the simple items first, then fit the unit once and correctly.

Fitting Guidance

Isolate the battery, mark the terminal positions, then disconnect the main cable and the signal wire. Clean around the mounting flange before the starter is withdrawn so dirt does not fall into the bell housing.

Check the ring gear through the aperture before fitting. Install the new unit with the original bolts, reconnect the cables in the same order and tighten the main terminal without over-stressing the stud. Crank briefly and confirm the pinion releases as the engine fires. This applies in particular to the STG91202 supplied for LEXUS LX 450 4.5L [1FZ-FE],TOYOTA Land Cruiser 4.5L [1FZ-FE].

Quality Control and Supply from Hejian Nuojin Auto Parts Co., Ltd.

Each production batch is inspected for housing dimensions, terminal integrity and pinion fit, and every starter is bench tested before it is boxed. Units ship in neutral cartons with foam protection, which keeps freight damage low and allows distributors to label stock under their own brand.

Standard references are held as spot goods, volume orders are delivered in around 30 days, and every unit carries a one-year warranty against manufacturing defects.

Frequently Asked Questions

How long should a replacement starter last?

There is no fixed interval, but a starter fed by a healthy battery and a clean earth path will outlast one that is repeatedly cranked on a low battery.

Why does the starter work cold but fail when hot?

Heat raises solenoid resistance and reduces brush spring pressure. Both effects build up gradually and appear first on a hot restart.

Does this starter come with the solenoid?

Yes. The unit is supplied complete with its solenoid, as shown in the product photographs. Mounting bolts are not included.

Should the ring gear be replaced at the same time?

Only if teeth are chipped, worn to a step or missing. Inspect the ring gear through the starter aperture before fitting the new unit.