OEX Starter Motor 12V 1.6KW 9 Tooth 1K0M18400 Suits BT50 1.9L 4X4

The OEX starter motor listed here is a new 12V passenger starter, part number 1K0M18400, described as suitable for BT50 1.9L 4x4 applications. It is an OE product and is supplied as each, so the main checks before ordering are the part number, the Denso unit make, and the physical dimensions around the mounting face and pinion.

Key electrical and mounting details are already defined: 1.6kW power rating, 9 teeth, 9mm pinion at rest, 75mm flange diameter, 197mm overall length, and a 2 hole starter mount type. These figures matter because starter motors can look similar but differ in bolt pattern, engagement depth, and rotation.

This unit is a 12V, clockwise rotation starter with mount hole sizes listed as M10x1.5 / M12x1.25 and mount centres A of 123mm. At 3.1kg, it is a relatively compact rotating electrical component, and the listed specifications should be checked carefully against the original starter removed from the vehicle before purchase.

Key Features

• OE product
• New starter motor
• 12V passenger starter
• 1.6kW power rating
• 9 tooth pinion
• Clockwise rotation

Specifications

• Part No.: 1K0M18400
• Brand: OEX
• Product type: Starter Motor Passenger
• Description: Starter Motor Suits BT50 1.9L 4X4
• Voltage: 12
• Power Rating: 1.6kW
• Rotation: CW
• Number of Teeth: 9

Fitment guidance

• Listed as suitable for BT50 1.9L 4x4 applications
• Fitment references include MAZDA BT-50 and MAZDA BT-50 2021

Application and Buying Notes

The most reliable way to confirm this starter is to match the part number 1K0M18400 first, then compare the physical and electrical details against the unit being replaced. The listed 12V system, 1.6kW rating, clockwise rotation, and 9 tooth pinion all need to line up with the vehicle’s original starter arrangement.

Mounting details are just as important as the electrical side. Check the 2 hole mount type, 123mm mount centres, 75mm flange diameter, and the listed M10x1.5 / M12x1.25 mount hole diameter before ordering. A starter can be the right family of part but still be wrong if the bolt pattern or engagement dimensions do not match.

The product is described as a Denso unit make, new, and supplied with a one year warranty. That gives a clear baseline for comparison, but the correct result still depends on the vehicle application and the existing starter specification. If the removed unit has visible markings, measure and compare the overall length of 197mm, pinion diameter of 32mm, and pinion at rest of 9mm to reduce the chance of ordering error.

For BT50 vehicles, treat the fitment reference as a check, not a substitute for verification. The model naming alone is not enough when starter motors vary by engine, drive type, and build details. Matching the part number and the mounting and pinion specifications remains the safest approach before installation.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 1K0M18400 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type STARTER MOTOR PASSENGER, Unit of Measure EACH, Warranty One Year, Mount Centres A 123mm, Number of Teeth 9, Pinion at Rest 9mm, Power Rating 1.6kW, Suits Unit Make Denso, New / Reman. New, Weight 3.1kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. 1K0M18400, Brand OEX, Description Starter Motor Suits BT50 1.9L 4X4, Flange Diameter 75mm, Mount Hole Diameter M10x1.5 / M12x1.25, Overall Length 197mm, Pinion Diameter 32mm, Rotation CW, Voltage 12.

Starter Motor Suits BT50 1.9L 4X4. Part number 1K0M18400 should be checked first. Listed voltage is 12. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number 1K0M18400, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a starter motor passenger in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include MAZDA BT-50, MAZDA BT-50 2021. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm fitment by comparing part number 1K0M18400, the Denso unit make, and the full mounting and pinion specifications with the starter removed from the vehicle before ordering.

FAQ

What vehicle is this starter motor listed for?

It is described as suitable for BT50 1.9L 4x4 applications, with fitment references to MAZDA BT-50 and MAZDA BT-50 2021. For this listing, part number 1K0M18400 is the main reference point. Listed voltage is 12. Published fitment references include MAZDA BT-50, MAZDA BT-50 2021. These details should still be checked against the original unit before ordering.

What is the part number?

The listed part number is 1K0M18400. For this listing, part number 1K0M18400 is the main reference point. Listed voltage is 12. Published fitment references include MAZDA BT-50, MAZDA BT-50 2021. These details should still be checked against the original unit before ordering.

Is this starter new or remanufactured?

It is listed as new. For this listing, part number 1K0M18400 is the main reference point. Listed voltage is 12. Published fitment references include MAZDA BT-50, MAZDA BT-50 2021. These details should still be checked against the original unit before ordering.

What are the key electrical specifications?

The starter is 12V with a 1.6kW power rating and clockwise rotation. For this listing, part number 1K0M18400 is the main reference point. Listed voltage is 12. Published fitment references include MAZDA BT-50, MAZDA BT-50 2021. These details should still be checked against the original unit before ordering.

How many teeth does the pinion have?

It has 9 teeth, with the pinion at rest listed as 9mm and pinion diameter listed as 32mm. For this listing, part number 1K0M18400 is the main reference point. Listed voltage is 12. Published fitment references include MAZDA BT-50, MAZDA BT-50 2021. These details should still be checked against the original unit before ordering.

What should I check before ordering?

Check the part number, Denso unit make, 2 hole mount type, 123mm mount centres, 75mm flange diameter, and the M10x1.5 / M12x1.25 mount hole diameter against the original starter. For this listing, part number 1K0M18400 is the main reference point. Listed voltage is 12. Published fitment references include MAZDA BT-50, MAZDA BT-50 2021. These details should still be checked against the original unit before ordering.