Bosch Starter Motor 12V 10 Tooth CW Part No. 1986S00774

This Bosch starter motor is a 12V unit with 10 teeth, clockwise rotation, and a 1.7kW power rating. It is listed under part number 1986S00774 and is supplied as one starter motor each, with a dry clutch arrangement.

Key physical details include an 89mm mount centres dimension, 60mm flange diameter, 26mm pinion at rest, and M10x1.5 mount hole diameter. The overall length is 254mm and the unit weighs 3.64kg, so it is important to compare the existing starter against these measurements before ordering.

The starter is described as being built to withstand harsh environments and carries a 12 month warranty. It is manufactured in China and sits in the rotating electrical / starter motors groups, which makes correct identification by part number and application especially important when replacing an existing unit.

Key Features

• Bosch starter motor
• 12V electrical system
• 10 tooth pinion
• Clockwise rotation (CW)
• 1.7kW power rating
• Built to withstand harsh environments

Specifications

• Part No.: 1986S00774
• Voltage: 12V
• Power Rating: 1.7kW
• Rotation: CW
• Number of Teeth: 10
• Mount Centres A: 89mm
• Flange Diameter: 60mm
• Overall Length: 254mm

Vehicle fitment

• MERCEDES-BENZ
• MERCEDES-BENZ C-CLASS
• MERCEDES-BENZ CLK
• MERCEDES-BENZ CLS
• MERCEDES-BENZ E-CLASS
• MERCEDES-BENZ G-CLASS
• MERCEDES-BENZ GL-CLASS
• MERCEDES-BENZ GLE

Application and Buying Notes

For starter motors, the best match comes from checking the part number, rotation, tooth count, mounting pattern, and dimensions together. This unit is 12V, 10 tooth, clockwise rotation, with 89mm mount centres and an M10x1.5 mount hole, so those details should be compared against the unit being removed before purchase.

The 60mm flange diameter, 254mm overall length, and 26mm pinion at rest are especially useful when confirming physical interchange. Even where a vehicle family is listed, the exact starter can vary, so matching these measurements reduces the risk of fitting the wrong unit.

If the old starter is available, compare the tooth count, CW rotation, flange diameter, mount centres, and overall length directly to this Bosch unit. That is the most reliable way to avoid guesswork, particularly when the same vehicle family may use more than one starter configuration.

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 1986S00774 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 12 Months, Mount Centres A 89mm, Number of Teeth 10, Pinion at Rest 26mm, Power Rating 1.7kW, Voltage 12, Number of mounting bores 2, Packaging width 18.

Additional published details for cross-checking include Manufactured in China, Product Group 2 STARTER MOTORS, Part No. 1986S00774, Brand BOSCH, Description Bosch Starter Motor 12V 10Th CW, Flange Diameter 60mm, Mount Hole Diameter M10x1.5, Overall Length 254mm, Pinion Diameter 26mm.

Bosch Starter Motor 12V 10Th CW. Part number 1986S00774 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 1986S00774, 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.

Available application references include 5-T 2009, 5-T 2010, 5-T 2011, 5-T 2012, 6-T 2009, 6-T 2010. 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.

The listed warranty is 12 Months. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm fitment by matching part number 1986S00774 and checking the starter’s 12V, 10 tooth, CW specification, mounting dimensions, and vehicle application details before purchase.

FAQ

What is the part number for this Bosch starter motor?

The part number is 1986S00774. For this listing, part number 1986S00774 is the main reference point. Listed voltage is 12. Published fitment references include 5-T 2009, 5-T 2010, 5-T 2011. These details should still be checked against the original unit before ordering.

What voltage and power rating does it have?

It is a 12V starter motor with a 1.7kW power rating. For this listing, part number 1986S00774 is the main reference point. Listed voltage is 12. Published fitment references include 5-T 2009, 5-T 2010, 5-T 2011. These details should still be checked against the original unit before ordering.

How many teeth does the pinion have?

It has 10 teeth. For this listing, part number 1986S00774 is the main reference point. Listed voltage is 12. Published fitment references include 5-T 2009, 5-T 2010, 5-T 2011. These details should still be checked against the original unit before ordering.

What is the rotation direction?

The starter rotates clockwise, shown as CW. For this listing, part number 1986S00774 is the main reference point. Listed voltage is 12. Published fitment references include 5-T 2009, 5-T 2010, 5-T 2011. These details should still be checked against the original unit before ordering.

What are the main mounting measurements?

The listed mounting details are 89mm mount centres, 60mm flange diameter, M10x1.5 mount hole diameter, and 2 mounting bores. For this listing, part number 1986S00774 is the main reference point. Listed voltage is 12. Published fitment references include 5-T 2009, 5-T 2010, 5-T 2011. These details should still be checked against the original unit before ordering.

Which vehicles are listed in the fitment data?

The fitment data references Mercedes-Benz applications including C-Class, CLK, CLS, E-Class, G-Class, GL-Class, GLE, GLS, M-Class, R-Class, S-Class, SL and Sprinter 5-T, along with 5-T and 6-T applications across multiple years. For this listing, part number 1986S00774 is the main reference point. Listed voltage is 12. Published fitment references include 5-T 2009, 5-T 2010, 5-T 2011. These details should still be checked against the original unit before ordering.