Bosch Starter Motor 12V 10 Tooth CW Part No. 1986S00854

The Bosch starter motor listed here is a 12V passenger starter motor with 10 teeth and clockwise rotation. It is identified by part number 1986S00854 and is supplied as each, which makes it straightforward to match against an existing starter before ordering.

This unit is part of Bosch’s rotating electrical range and is described as being designed in fit and performance to meet OE starters. For buyers replacing a failed starter, the key checkpoints are the 12V rating, 10-tooth drive, clockwise rotation, and the 2 mounting bores listed for this unit.

The starter is supported by a 12 months warranty and is manufactured in China. Packaging dimensions are listed as 32.5 cm long, 18 cm wide, and 13.9 cm high, which may be useful for storage or freight planning when ordering alongside other parts.

Key Features

• 12V passenger starter motor
• 10-tooth drive
• Clockwise rotation
• 2 mounting bores
• Designed to meet OE starter fit and performance
• 12 months warranty

Specifications

• Brand: Bosch
• Part No.: 1986S00854
• Type: Starter motor passenger
• Voltage: 12V
• Rotation: CW
• Number of teeth: 10
• Number of mounting bores: 2
• Unit of measure: Each

Fitment guidance

• Fitment information supplied includes Mercedes-Benz applications.
• Listed vehicle families include Mercedes-Benz C-Class, CLS, E-Class, S-Class, SL, and SLK.
• Sample application references include Mercedes-Benz C-Class 2011, 2012, 2013, 2014, 2015, and 2016.
• Confirm the existing starter’s part number, 12V rating, 10-tooth count, clockwise rotation, and mounting bore arrangement before ordering.

Application and Buying Notes

For a starter motor, the part number and the physical match matter just as much as the badge on the vehicle. This Bosch unit is identified as 1986S00854, with 12V electrical specification, 10 teeth, clockwise rotation, and 2 mounting bores, so those details should be checked against the removed unit before purchase.

The supplied fitment references point to Mercedes-Benz passenger applications, including C-Class, CLS, E-Class, S-Class, SL, and SLK. That still does not replace a direct match check, because starter motor variants can differ by engine and build details even within the same model family.

If you are replacing a starter that has become noisy, intermittent, or completely inoperative, matching the drive count, rotation direction, and mounting pattern is essential. The listed 10-tooth CW configuration is the most important compatibility checkpoint here, followed by the part number 1986S00854.

Bosch describes this starter as designed in fit and performance to meet OE starters and built to withstand harsh environments. That is useful context, but the practical buying step is still the same: compare the old starter, confirm the terminal and mounting layout, and make sure the listed 12V specification matches the vehicle system.

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 1986S00854 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 12 Months, Rotation CW, Number of mounting bores 2, Packaging width 18, Manufactured in China, Product Group 1 ROTATING ELECTRICAL, Part No. 1986S00854, Brand BOSCH.

Additional published details for cross-checking include Description Bosch Starter Motor 12V 10Th CW, Number of Teeth 10, Voltage 12, Packaging length 32.5, Packaging height 13.9, Product Group 2 STARTER MOTORS.

Bosch Starter Motor 12V 10Th CW. Part number 1986S00854 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 1986S00854, 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 MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012, MERCEDES-BENZ C-CLASS 2013. 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: Please confirm compatibility using part number 1986S00854, the 12V rating, 10-tooth CW configuration, and the 2 mounting bores against the vehicle and the removed starter before ordering.

FAQ

What is the part number for this Bosch starter motor?

The part number listed is 1986S00854. For this listing, part number 1986S00854 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012. These details should still be checked against the original unit before ordering.

What voltage is this starter motor?

It is a 12V starter motor. For this listing, part number 1986S00854 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012. These details should still be checked against the original unit before ordering.

How many teeth does the starter have?

The starter is listed with 10 teeth. For this listing, part number 1986S00854 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012. These details should still be checked against the original unit before ordering.

What rotation direction does it use?

The rotation is clockwise, listed as CW. For this listing, part number 1986S00854 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012. These details should still be checked against the original unit before ordering.

Which vehicle families are referenced for fitment?

The fitment references supplied include Mercedes-Benz C-Class, CLS, E-Class, S-Class, SL, and SLK. For this listing, part number 1986S00854 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012. These details should still be checked against the original unit before ordering.

What warranty is listed?

A 12 months warranty is listed for this starter motor. For this listing, part number 1986S00854 is the main reference point. Listed voltage is 12. Published fitment references include MERCEDES-BENZ C-CLASS, MERCEDES-BENZ C-CLASS 2011, MERCEDES-BENZ C-CLASS 2012. These details should still be checked against the original unit before ordering.