OEX Alternator 12V 70A Lucas Style LXA120

The OEX Alternator LXA120 is a 12V, 70A unit in Lucas style, supplied as a new alternator with an internal regulator. It suits Lucas applications and is listed with a twin leg alternator mount, 83mm inside mounting legs, and a 10mm pivot hole diameter.

This alternator carries a 73mm outside diameter pulley with an A section pulley profile and a 9mm adjusting hole diameter. The unit is identified with pin code IR25 and includes a W terminal for tacho output, which is a useful check when matching to the existing electrical setup.

As a new rotating electrical part, the OEX LXA120 is listed at 4.3kg and is backed by a 3 year passenger / 1 year commercial warranty. For any replacement alternator, the most reliable match is the part number, mounting style, pulley dimensions, and terminal arrangement rather than vehicle model name alone.

Key Features

• 12V alternator with 70A power rating
• Lucas style unit, suited to Lucas applications
• Internal regulator fitted
• Twin leg alternator mount
• W terminal for tacho output
• New unit, not remanufactured

Specifications

• Brand: OEX
• Part No.: LXA120
• Type: Alternator
• Voltage: 12V
• Power rating: 70A
• New / Reman.: New
• Regulator type: Internal
• Alternator mount: Twin leg

Fitment guidance

• Listed fitment includes Audi A4, Austin-Healey Sprite and Sprite Mk.III, BMW 5, Ford Cortina, Land Rover 88/109 and 110/127, MAN M90, MINI Countryman, Nissan Juke, Rover 3500 and Rover 800.
• Because the fitment list spans multiple makes and years, confirm the original alternator matches the Lucas style, twin leg mount, 83mm inside mounting legs, 10mm pivot hole, and 73mm pulley diameter before ordering.
• Check the vehicle’s existing pulley section, adjusting hole size, and terminal arrangement, including the W terminal for tacho output where applicable.
• The part number LXA120 is the safest ordering reference when cross-checking against an existing alternator or catalogue listing.

Application and Buying Notes

When replacing an alternator, the key checks are the mount style, pulley size, regulator type, and terminal layout. On this OEX unit, the critical identifiers are LXA120, 12V, 70A, twin leg mount, 83mm inside mounting legs, and a 73mm pulley outside diameter.

The internal regulator means it is intended for systems that match that control arrangement. If the existing alternator uses a different regulator setup or a different terminal arrangement, the unit may not be a direct swap even if the vehicle is similar.

The W terminal for tacho output is worth confirming before purchase. If the vehicle uses that signal, the replacement alternator needs to provide the same connection point so the tacho function can remain available.

For physical fit, measure the mounting points on the old alternator and compare the pivot hole diameter of 10mm, the adjusting hole diameter of 9mm, and the 83mm inside mounting legs. Small differences here can stop the unit from sitting correctly on the bracket.

The 70A rating is the electrical output figure supplied for this unit. It should be treated as part of the matching process, along with the Lucas style designation and pin code IR25, rather than the only selection criterion.

If you are cross-checking for a workshop job or fleet repair, keep the old alternator until the replacement is confirmed against the part number, mount configuration, and pulley details. That avoids fitting delays and reduces the chance of ordering the wrong rotating electrical part.

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 LXA120 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 83mm, Pivot Hole Diameter 10, Pulley Outside Diameter 73mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. LXA120, Brand OEX, Description OEX Alternator 12V 70A Lucas Style, Adjusting Hole Diameter 9, Pin Code IR25, Power Rating (Amp) 70, Pulley Section A, Suits Unit Make Lucas.

OEX Alternator 12V 70A Lucas Style. Part number LXA120 should be checked first. Listed voltage is 12. Listed output rating is 70. 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 A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number LXA120, 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 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching the part number LXA120, Lucas style application, twin leg mount, 83mm inside mounting legs, 10mm pivot hole, 9mm adjusting hole, 73mm pulley diameter, and the W terminal arrangement before purchase.

FAQ

What is the part number for this alternator?

The part number is LXA120.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 12V alternator with a 70A power rating.

Does it have an internal regulator?

Yes. The regulator type is internal.

What mount and pulley details should I check?

Check the twin leg alternator mount, 83mm inside mounting legs, 10mm pivot hole diameter, 9mm adjusting hole diameter, and 73mm pulley outside diameter with A section pulley profile.

Does it have a tacho connection?

Yes. It is noted as having a W terminal for tacho output.