Bosch Starter Motor 12V 10 Tooth CW 1986S00840

The Bosch Starter Motor 12V 10 Tooth CW is a rotating electrical starter supplied as a single unit, with 12 volt operation, clockwise rotation and 10 teeth on the drive. The listed part number is 1986S00840, and the unit is identified as Bosch starter motor product group stock for vehicle electrical applications.

This starter is listed with 2 mounting bores and is manufactured in Hungary. It carries a 12 month warranty and is packaged as each, with packaging dimensions of 28.8 length, 16.7 width and 12 height. Those details matter when checking space, mounting layout and replacement part comparison before ordering.

The stated product description notes design intent to meet OE starter fit and performance, with premium starting performance and construction suited to harsh environments. As with any starter replacement, the safest approach is to confirm the part number, tooth count, rotation and mounting arrangement against the vehicle application before purchase.

Key Features

• Bosch starter motor for 12 volt systems
• 10 tooth pinion
• Clockwise rotation
• 2 mounting bores
• Supplied each
• 12 month warranty

Specifications

• Brand: Bosch
• Part No.: 1986S00840
• Type: Starter motor
• Voltage: 12
• Number of teeth: 10
• Rotation: CW
• Number of mounting bores: 2
• Unit of measure: Each

Verified fitment details

• Porsche Cayenne
• Porsche Macan
• Porsche
• Porsche Cayenne 2010
• Porsche Cayenne 2011
• Porsche Cayenne 2012
• Porsche Cayenne 2013
• Porsche Cayenne 2014

Application and Buying Notes

For a starter motor, the key checks are the part number 1986S00840, the 12 volt rating, the 10 tooth pinion and clockwise rotation. If any of those do not match the vehicle’s original unit, it should not be assumed to be correct, even if the make or model appears similar.

The 2 mounting bores are another important checkpoint. Mounting layout must suit the engine and bellhousing arrangement, so compare the physical fixing pattern on the existing starter rather than relying on appearance alone. Packaging size is also listed at 28.8 x 16.7 x 12, which can help when checking handling or storage requirements.

The fitment information provided references Porsche Cayenne and Porsche Macan applications, including Cayenne 2010 through 2017 and Macan 2014 through 2015. That gives a useful starting point, but the final decision should still be based on the vehicle’s VIN, engine details, and the existing starter’s markings and configuration.

Bosch describes the unit as designed in fit and performance to meet OE starters and built to withstand harsh environments. Those are useful performance indicators, but they do not replace a direct fit check. Starter motor compatibility can vary between model years, engine types and electrical setups, so matching the listed specifications is the practical safeguard.

If you are ordering for a workshop job or a parts counter replacement, keep the Bosch part number 1986S00840 with the vehicle details. That is the clearest reference point for confirming the starter supplied here is the same style and specification as the unit being removed.

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 1986S00840 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, Rotation CW, Number of mounting bores 2, Packaging width 16.7, Manufactured in Hungary, Product Group 1 ROTATING ELECTRICAL, Part No. 1986S00840, Brand BOSCH.

Additional published details for cross-checking include Description Bosch Starter 12V 10Th CW, Number of Teeth 10, Voltage 12, Packaging length 28.8, Packaging height 12, Product Group 2 STARTER MOTORS.

Bosch Starter 12V 10Th CW. Part number 1986S00840 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 1986S00840, 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 using Bosch part number 1986S00840, 12V, 10 tooth CW rotation, and the 2-mounting-bore configuration against the vehicle application before ordering.

FAQ

What type of part is this?

This is a Bosch starter motor, listed under rotating electrical parts, supplied as a single unit. For this listing, part number 1986S00840 is the main reference point. Listed voltage is 12. Published fitment references include PORSCHE CAYENNE, PORSCHE CAYENNE 2010, PORSCHE CAYENNE 2011. These details should still be checked against the original unit before ordering.

What is the voltage rating?

The listed voltage is 12V. For this listing, part number 1986S00840 is the main reference point. Listed voltage is 12. Published fitment references include PORSCHE CAYENNE, PORSCHE CAYENNE 2010, PORSCHE CAYENNE 2011. 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 1986S00840 is the main reference point. Listed voltage is 12. Published fitment references include PORSCHE CAYENNE, PORSCHE CAYENNE 2010, PORSCHE CAYENNE 2011. These details should still be checked against the original unit before ordering.

What rotation does it have?

The rotation is clockwise, shown as CW. For this listing, part number 1986S00840 is the main reference point. Listed voltage is 12. Published fitment references include PORSCHE CAYENNE, PORSCHE CAYENNE 2010, PORSCHE CAYENNE 2011. These details should still be checked against the original unit before ordering.

What is the part number?

The Bosch part number listed is 1986S00840. For this listing, part number 1986S00840 is the main reference point. Listed voltage is 12. Published fitment references include PORSCHE CAYENNE, PORSCHE CAYENNE 2010, PORSCHE CAYENNE 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 Porsche Cayenne and Porsche Macan applications, including Cayenne 2010 to 2017 and Macan 2014 to 2015. Final fitment should still be confirmed against the vehicle and existing starter details. For this listing, part number 1986S00840 is the main reference point. Listed voltage is 12. Published fitment references include PORSCHE CAYENNE, PORSCHE CAYENNE 2010, PORSCHE CAYENNE 2011. These details should still be checked against the original unit before ordering.