OEX Starter Motor 12V 9 Tooth CW Bosch Style BXS4021

The OEX Starter Motor BXS4021 is a new 12V starter motor with 9 teeth, clockwise rotation and a 2.5kW power rating. It is listed as a Bosch style unit and suits Bosch applications, so matching the part number and starter type is an important first check before ordering.

This starter motor is supplied as each, with a 3 hole starter mount type and an M8x1.25 mount hole diameter. Key dimensions include 116mm mount centres A, 82mm mount centres C, an 82mm flange diameter, a 65mm nose cone length and an overall length of 248mm.

The pinion diameter is 36mm, the pinion at rest is 24mm and the unit weighs 3.98kg. It is listed as a dry clutch starter motor and is backed by a 3 year passenger / 1 year commercial warranty.

Key Features

• New OEX starter motor
• 12V, 9 tooth, clockwise rotation
• Bosch style unit
• Suits Bosch unit make
• 3 hole starter mount
• Dry clutch application

Specifications

• Part No.: BXS4021
• Voltage: 12V
• Power rating: 2.5kW
• Rotation: CW
• Number of teeth: 9
• Starter mount type: 3 hole
• Mount hole diameter: M8x1.25
• Mount centres A: 116mm

Compatibility guidance

• Fitment information provided includes Fiat and Fiat Ducato references.
• Sample applications include Fiat Ducato, with years shown from 1997 through 2007.
• Use the part number BXS4021, the Bosch style reference and the physical dimensions to confirm suitability before purchase.

Application and Buying Notes

The most reliable way to confirm this starter motor is by matching BXS4021 against the existing unit and checking that the application is Bosch style. The listed 12V electrical setup, 9 tooth pinion and clockwise rotation all need to align with the vehicle’s original starter specification.

Physical dimensions matter here as much as the electrical details. This unit has 116mm mount centres A, 82mm mount centres B and C, an 82mm flange diameter, a 65mm nose cone length and an overall length of 248mm, so the mounting position and clearance should be checked carefully against the removed part.

The 3 hole mount type and M8x1.25 mount hole diameter are important installation points, particularly where the mounting bracket or bellhousing arrangement is tight. The 36mm pinion diameter, 24mm pinion at rest and dry clutch design are also useful checks when comparing against the original starter.

If you are buying for a Fiat or Fiat Ducato application, confirm the exact vehicle details against the part number rather than relying on model name alone. The fitment information supplied is broad, so the safest approach is to compare the old starter, mounting pattern, tooth count and rotation before fitting.

The 2.5kW power rating and 3.98kg weight provide a good reference when comparing replacements, especially if the original unit has a visible label or stamped specifications. Matching these details reduces the chance of ordering the wrong starter for the vehicle.

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 BXS4021 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, Unit of Measure EACH, Warranty 3yr Passenger 1yr Commercial, Mount Centres A 116mm, Mount Centres C 82mm, Nose Cone Length 65mm, Overall Length 248mm, Pinion Diameter 36mm, Rotation CW, Voltage 12.

Additional published details for cross-checking include Starter Mount Type 3 Hole, Weight 3.98kg, Product Group 1 ROTATING ELECTRICAL, Part No. BXS4021, Brand OEX, Description OEX Starter Motor 12V 9Th CW Bosch Style, Flange Diameter 82mm, Mount Centres B 82mm, Mount Hole Diameter M8x1.25, Number of Teeth 9.

OEX Starter Motor 12V 9Th CW Bosch Style. Part number BXS4021 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 BXS4021, 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 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.

Compatibility note: Please confirm fitment by matching part number BXS4021, Bosch style application details and the listed dimensions against the original starter motor before purchase. Vehicle fitment should always be checked against the specific application, as starter motor specifications can vary within the same model range.

FAQ

Is this starter motor new or remanufactured?

It is listed as new, not remanufactured. For this listing, part number BXS4021 is the main reference point. Listed voltage is 12. Published fitment references include FIAT DUCATO, FIAT DUCATO 1997, FIAT DUCATO 1998. These details should still be checked against the original unit before ordering.

What voltage is the OEX starter motor?

The starter motor is 12V. For this listing, part number BXS4021 is the main reference point. Listed voltage is 12. Published fitment references include FIAT DUCATO, FIAT DUCATO 1997, FIAT DUCATO 1998. These details should still be checked against the original unit before ordering.

How many teeth does the pinion have?

It has 9 teeth. For this listing, part number BXS4021 is the main reference point. Listed voltage is 12. Published fitment references include FIAT DUCATO, FIAT DUCATO 1997, FIAT DUCATO 1998. These details should still be checked against the original unit before ordering.

What rotation does this starter motor use?

It is clockwise rotation, shown as CW. For this listing, part number BXS4021 is the main reference point. Listed voltage is 12. Published fitment references include FIAT DUCATO, FIAT DUCATO 1997, FIAT DUCATO 1998. These details should still be checked against the original unit before ordering.

What vehicles are mentioned in the fitment information?

The supplied fitment information includes Fiat and Fiat Ducato references, with sample Ducato applications shown from 1997 through 2007. For this listing, part number BXS4021 is the main reference point. Listed voltage is 12. Published fitment references include FIAT DUCATO, FIAT DUCATO 1997, FIAT DUCATO 1998. These details should still be checked against the original unit before ordering.

What warranty is listed?

The listed warranty is 3 years for passenger use and 1 year for commercial use. For this listing, part number BXS4021 is the main reference point. Listed voltage is 12. Published fitment references include FIAT DUCATO, FIAT DUCATO 1997, FIAT DUCATO 1998. These details should still be checked against the original unit before ordering.