OEX Alternator 12V 100A Lucas Style LXA831

The OEX Alternator LXA831 is a 12V, 100A unit described as Lucas style and supplied new. It suits Lucas applications and uses a twin leg alternator mount, with a 7 groove pulley and internal regulator.

Key dimensions recorded for identification and matching are 149mm mount centre to centre, 80mm inside mounting legs, 8mm pivot hole diameter and 8mm adjusting hole diameter. The pulley outside diameter is 53mm, and the shaft dimension is 17mm.

For buyers comparing replacements, the important identifiers here are the OEX brand, part number LXA831, pin code IR130, and the 100 amp power rating. Those details should be checked against the existing unit before ordering, especially on Lucas-style charging systems.

This alternator is sold as a single each unit and weighs 6.2kg. The warranty listed is 3 years for passenger use and 1 year for commercial use, which gives a clear service context for private and trade applications.

Key Features

• 12V alternator with 100A output
• Lucas style, suits Lucas unit make
• New unit, sold each
• Internal regulator
• Twin leg mount
• 7 groove pulley

Specifications

• Voltage: 12V
• Power rating: 100A
• Regulator type: Internal
• Alternator mount: Twin leg
• Pulley section: 7 groove
• Pulley outside diameter: 53mm
• Inside mounting legs: 80mm
• Mount centre to centre: 149mm

Known fitment references

• Lucas applications are listed as the intended unit make.
• Referenced vehicle groups include Ford, Land Rover and New Holland.
• Grouped previews include Ford 7000-Series, Ford 8000-Series and Ford Transit.
• Grouped previews include Land Rover Defender, Land Rover Discovery and Land Rover Range Rover.
• Grouped previews include New Holland 5640, 8160, 8260, 8360, 8560 and several construction models including C185, C227, C232, C238, L185, L225, L230, M100, M115, M135 and M160.
• Specific sample applications shown include Ford 7000-Series, Ford 8000-Series, Ford Transit, Land Rover Defender and New Holland 5640 and 8160.
• Fitment should still be confirmed by part number, mounting measurements and pulley details before purchase.

Application and Buying Notes

Before ordering, compare the existing alternator against the recorded identifiers: OEX part number LXA831, Lucas style, 12V output and 100A rating. The mounting pattern also matters here, with twin leg mounting, 149mm mount centre to centre, 80mm inside mounting legs, 8mm pivot hole diameter and 8mm adjusting hole diameter.

The pulley arrangement is another important check. This unit has a 7 groove pulley with a 53mm outside diameter and a 17mm shaft dimension, so the belt type and pulley profile on the vehicle need to match the replacement part. A visual match alone is not enough if the belt section or shaft setup differs.

Because this alternator is listed against Lucas applications and multiple Ford, Land Rover and New Holland groups, the safest approach is to confirm the original unit by part number and measurement rather than by vehicle badge alone. That is especially important on older or converted equipment where charging system parts can vary.

If the vehicle is used commercially, the listed warranty is 1 year, while passenger use carries 3 years. Weight is 6.2kg, so handling and installation should be planned accordingly, and the old unit should be checked for any signs of bracket wear or pulley misalignment before the new alternator is fitted.

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 LXA831 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 3yr Passenger 1yr Commercial, Inside Mounting Legs 80mm, Pivot Hole Diameter 8, Pulley Outside Diameter 53mm, Regulator Type Internal, Voltage 12, Mount Cnt to Cnt 149mm, Shaft Dimension 17.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. LXA831, Brand OEX, Description OEX Alternator 12V 100A Lucas Style, Adjusting Hole Diameter 8, Pin Code IR130, Power Rating (Amp) 100, Pulley Section 7 Groove, Suits Unit Make Lucas.

OEX Alternator 12V 100A Lucas Style. Part number LXA831 should be checked first. Listed voltage is 12. Listed output rating is 100. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is Internal. Pulley configuration is 7 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number LXA831, 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 alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 and output 100 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include FORD 7000-SERIES, FORD 7000-SERIES 1960, FORD 7000-SERIES 1988, FORD 8000-SERIES, LAND ROVER DEFENDER, LAND ROVER DEFENDER 1990. 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: Confirm compatibility by matching the OEX part number LXA831, Lucas style application, 12V 100A rating, twin leg mount and the listed mounting and pulley measurements against the vehicle’s original alternator before purchase.

FAQ

What is the part number for this alternator?

The listed OEX part number is LXA831. The pin code is IR130.

What voltage and output does it have?

It is a 12V alternator with a 100A power rating.

Is this alternator new or remanufactured?

It is listed as new.

What type of regulator does it use?

It uses an internal regulator.

What mounting and pulley details are listed?

It has a twin leg mount, 149mm mount centre to centre, 80mm inside mounting legs, 8mm pivot and adjusting holes, and a 7 groove pulley with 53mm outside diameter.

What warranty is listed?

The listed warranty is 3 years for passenger use and 1 year for commercial use.