Bosch Alternator 12V 90A AL929N

This Bosch alternator is a 12V, 90A unit supplied as a new part, with internal regulation and a single-leg alternator mount. The listed part number is AL929N, and the unit weight is 4.86kg, which gives you a practical reference when comparing against the existing alternator in the vehicle or equipment.

Key mounting details are supplied for identification: mount leg thickness is 51mm, pivot hole diameter is 10mm, adjusting hole diameter is M8 x 1.25, and mount centre to centre is 173mm. The shaft diameter is 17mm, so it is important to confirm the physical layout before ordering, especially where the alternator sits in a compact accessory drive arrangement.

The alternator is described as suitable for Thermo King applications across several listed ranges, including CG-II, RC-II, SB-II, SB-III, SB200, SB300, SENTRY, SG2000, SL100/200, SL100E/200E, SL300/400, SL400E, SPECTRUM SB, SUPER II, SUPER III, SUPER MAX, SUPER NWD and TD-II. That fitment information should still be checked against the part number and the exact application details on the existing unit.

The stated product features include high-quality raw materials for long life and optimal performance, corrosion resistance for harsh conditions, and a reduction drive for continual speeds to assist easier starting. Those points are useful when the alternator is being selected for demanding commercial or transport use, where reliability and correct matching matter more than general appearance.

Key Features

• 12V alternator with 90A power rating
• New unit, supplied each
• Internal regulator
• Single leg alternator mount
• Corrosion resistant construction
• Reduction drive for continual speeds

Specifications

• Brand: Bosch
• Part No.: AL929N
• Voltage: 12V
• Power rating: 90A
• Type: Alternator
• Regulator type: Internal
• Alternator mount: Single leg
• Mount leg thickness: 51mm

Verified fitment applications

• Thermo King CG-II
• Thermo King RC-II
• Thermo King SB-15D
• Thermo King SB-II
• Thermo King SB-III
• Thermo King SB200
• Thermo King SB300
• Thermo King SENTRY

Application and Buying Notes

Before buying, match the Bosch part number AL929N with the alternator you are replacing. The fitment list supplied here is Thermo King based, but the safest check is always the existing part number, the mount style, and the physical dimensions: 51mm mount leg thickness, 10mm pivot hole diameter, M8 x 1.25 adjusting hole, 173mm mount centre to centre, and 17mm shaft diameter.

This alternator is rated at 12V and 90A, so it is intended to replace a unit with the same electrical specification. If the system on the vehicle or equipment uses a different output rating, a different regulator arrangement, or a different mounting pattern, it should not be treated as interchangeable without checking the application carefully.

The internal regulator is an important detail because regulator type must align with the charging system setup. If the existing alternator uses a different regulation arrangement, the electrical connection and charging behaviour may not match, even if the housing looks similar.

Because this is a new alternator rather than a remanufactured unit, it is a direct parts decision rather than a rebuild choice. The supplied warranty is one year, which gives a useful reference point, but it does not replace the need to confirm fitment and application before installation.

If you are replacing an alternator on Thermo King equipment, cross-check the model designation on the equipment plate or the removed part against the listed ranges. The fitment list includes multiple CG-II, RC-II, SB, SUPER and SL variants, but the exact application still needs to align with the part number and mounting dimensions.

Commercial equipment can vary within a model family, so do not rely on model name alone. Matching the mount style, hole sizes, shaft diameter, and output rating is the practical way to reduce the risk of ordering the wrong alternator and having a vehicle or unit down for longer than necessary.

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 AL929N 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 ALTERNATOR, Unit of Measure EACH, Warranty One Year, Mount Leg Thickness 51mm, Pivot Hole Diameter 10, Regulator Type Internal, Suits Unit Make Bosch, Alternator Mount Single Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. AL929N, Brand BOSCH, Description Bosch Alternator 12V 90A, Adjusting Hole Diameter M8 x 1.25, Pin Code IR110, Power Rating (Amp) 90, Shaft Diameter 17mm, Voltage 12, Mount Cnt to Cnt 173mm.

Bosch Alternator 12V 90A. Part number AL929N should be checked first. Listed voltage is 12. Listed output rating is 90. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Compatibility note: Confirm fitment using Bosch part number AL929N, the listed 12V 90A specification, and the mounting measurements before purchase. Thermo King application details should be matched to the exact unit on the vehicle or equipment, as model names alone are not enough to verify compatibility.

FAQ

What is the Bosch part number for this alternator?

The listed Bosch part number is AL929N.

What voltage and output does this alternator have?

It is a 12V alternator with a 90A power rating.

Is this alternator new or remanufactured?

It is listed as new.

What regulator type does it use?

It uses an internal regulator.

What are the key mounting measurements?

The mount leg thickness is 51mm, pivot hole diameter is 10mm, adjusting hole diameter is M8 x 1.25, and mount centre to centre is 173mm.

Which applications are listed for fitment?

Listed Thermo King applications include CG-II, RC-II, SB-15D, SB-II, SB-III, SB200, SB300, SENTRY, SG2000, SL100/200, SL100E/200E, SL300/400, SL400E, SPECTRUM SB, SUPER II, SUPER III, SUPER MAX, SUPER NWD and TD-II.