Nissan Maxima Alternator 23100-2Y005 | 12V 110A | 6PK

Product Overview

The 23100-2Y005 is a Nissan OE part number for a 12-volt 110-amp alternator built for the Maxima A32 and A33 generation, the V6-powered luxury sedans that ran the VQ20DE, VQ25DE, and VQ30DE engines from 1994 to 2000 and beyond. The unit is a Mitsubishi design carrying the 23100-2Y005 and 2310031U00 references, with the cross numbers A13826, LR1110729C, 283547, JA990IR, and a long aftermarket list. It serves the Nissan Maxima QX and the Infiniti I35 that shared its platform and drivetrain. It is fitted with a 6PK six-rib pulley and an internal regulator.

The reason this alternator is still in demand is the car it served. The Maxima A32 was Nissan's flagship sedan in the 1990s, and the V6 engines under its bonnet were among the most advanced of the decade. The VQ30DE in particular earned a reputation for smooth power delivery and a broad power band, and the cars that carry it are still on the road in significant numbers. A 110-amp alternator for a 1990s luxury V6 is a steady replacement item, because the electrical load on a prestige sedan of that era was high by the standards of its time, and the original units have done their miles. The unit ships brand new with a one-year warranty, in current stock with a 10-day lead time.

Net weight is 6.15kg; gross weight is 6.45kg. Dimensions are 240 by 170 by 180mm. Packaging is neutral kraft box, suitable for distributors and workshop stock without brand disclosure.

The V6 Luxury Sedan and Its Electrical Appetite

The Maxima A32 arrived as Nissan's prestige offering, and the V6 under the bonnet was the centrepiece. The VQ20DE, VQ25DE, and VQ30DE are all members of Nissan's VQ engine family, the series that would go on to win multiple awards and become one of the most respected six-cylinder engines of its era. The 3.0-litre VQ30DE produced 170 to 220 horsepower depending on the market, and it did it with refinement that set the benchmark for the class. What that means for the alternator is an electrical load that is high for the era: fuel injection, variable valve timing, air conditioning, the climate system, and the options list on a loaded Maxima could add up quickly, and the 110-amp rating was Nissan's answer to keeping all of it running without draining the battery at idle.

The 110-amp output is the important figure here, because it puts this alternator above the 80-amp units common on the compact and economy range. On a V6 luxury sedan with its accessories, the headroom matters: a 110-amp unit holds voltage under the combined load of lights, climate, and the fuel injection system in a way that a smaller unit cannot, and that translates into stable idle, reliable cold starts, and a battery that charges properly after short urban runs. The 6PK pulley drives the full accessory set, and a correct rib count matters because a wrong pulley slips or chews the belt on a car where the serpentine belt run can be tight.

The diagnosis is the same for any 1990s charging system: at 2000 rpm with the lights, blower, and air conditioning on, battery voltage should hold 13.8 to 14.4V. Below 13.5V under load, the alternator is not keeping up, and on a Maxima that first shows as a battery warning, dimming lights, or an irregular idle that clears when the revs rise. Because the V6 accessory belt run is shared with the power steering pump and the air conditioning compressor, a failing bearing in any of those components can load the belt and mimic a weak alternator, so it is worth checking the idler and tensioner before condemning the unit.

For sourcing, the leverage is the cross-reference list, because the same Mitsubishi-design unit is sold under Nissan, Infiniti, and aftermarket numbers across the Maxima and I35 range. The 23100-2Y005, 23100-2Y900, and A13826 references all describe this unit, and the LRA01755, LR1110729C, and Lucas cross numbers help when a catalogue carries a different reference. Confirm the part number, the 6PK pulley, and the 110A rating together, because the Maxima and the related Infiniti I35 saw different alternator ratings over their model runs.

Technical Specifications

Engine Compatibility

The 23100-2Y005 alternator fits the Nissan Maxima A32 and A33 generation across the VQ20DE, VQ25DE, and VQ30DE engine range. Confirm fitment by model, year, and engine code.

The Infiniti I35, which shared the Maxima platform and drivetrain in certain markets, also uses this alternator family. Confirm the part number, the 6PK pulley, and the 110A rating against the old unit, because the Maxima and I35 saw different alternator ratings across the model run. The 110A unit is the specification for the V6 engines listed above.

What to Look for a Replacement

The first check is the pulley. This unit uses a 6PK six-rib pulley, and the rib count has to match the old belt and the other accessories on the front of the engine. The Maxima accessory belt run shares the same serpentine belt for the power steering, the air conditioning, and the water pump, so a wrong pulley count or a worn tensioner affects everything. Confirm the 6PK pulley and the 110A rating before ordering, because the Maxima range saw several alternator variants over the model run.

The second check is the idler and tensioner. The V6 accessory belt on the Maxima runs a tensioner and an idler that can develop a worn bearing, and a failing idler produces a high-pitched noise and a belt slip that reads as a weak alternator under load. Spin the idler by hand if accessible; if it feels rough or noisy, replace the idler at the same time as the alternator to avoid a come-back.

The third check is the voltage under load. With the engine at 2000 rpm and the lights, blower, and air conditioning on, battery voltage should hold 13.8 to 14.4V. Below 13.5V under load, the alternator is the likely cause. Confirm with the test before ordering, because a flat battery or a poor B+ connection can mimic a weak alternator. Also check the battery itself, because on a car of this age a tired battery can drag the system down and make a healthy alternator look weak.

For the install, the standard procedure is sound: disconnect the negative battery terminal, unplug the regulator connector, remove the B+ nut, slacken the adjustment and pivot bolts, swing the unit out, and refit in reverse order. Set the belt tension by pressing the longest run at the midpoint, about 10 to 15mm under thumb pressure, and recheck after a short run. Photo the harness route before removal to avoid a crossed wire, and confirm the plug orientation before reconnecting.

Application Scenarios

• Independent Nissan and Infiniti specialists working on the Maxima A32 and A33, where the 110A alternator is a regular replacement at high mileage on the V6 engines. The 23100-2Y005 and 23100-2Y900 references are the numbers to source, and the Mitsubishi A13826, LRA01755, and LR1110729C cross numbers help when the catalogue carries a different reference.

• The Maxima as a used-car premium sedan, where the V6 engines and the electrical systems are well past their original warranty and the alternator is a predictable maintenance item. The VQ30DE in particular has a strong enthusiast following, and a well-maintained charging system keeps the fuel injection and the variable valve timing working as they should.

• JDM and import specialists, where the Maxima A32 and the Infiniti I35 share the same electrical system and the same alternator family. The cross-reference list covers both nameplates, so a counter that stocks 23100-2Y005 or A13826 covers the full range.

• Parts counters that carry one box to cover the A32 and A33 Maxima across all three VQ engine displacements, because 23100-2Y005, 23100-2Y900, and the Mitsubishi A13826 all resolve to this 110A unit. The 6PK pulley and the 110A rating are the features to confirm.

• Workshops diagnosing a battery warning or dimming lights on a Maxima, where the 2000 rpm load test separates a weak alternator from a failing idler, a worn tensioner, or a flat battery. The V6 accessory belt run is shared, so check the idler and tensioner before condemning the unit.

• DIY owners who have diagnosed a charging fault with a multimeter and need the correct part number, pulley, and rating before fitting the replacement themselves.

FAQ

Q: Will this alternator fit my Nissan Maxima 3.0 V6?

A: Yes. The 23100-2Y005 is the correct 12V 110A 6PK alternator for the Maxima A32 with the 3.0-litre VQ30DE, the 2.5-litre VQ25DE, and the 2.0-litre VQ20DE, and the Maxima A33 with the VQ25DE. It also covers the Infiniti I35 that shared the platform and drivetrain. Confirm the existing part number, the 6PK pulley, and the 110A rating before ordering, because the Maxima and I35 range saw different alternator ratings over the model run.

Q: What is the difference between 23100-2Y005, 23100-2Y900, and the Mitsubishi number?

A: These describe the same alternator under different catalogue systems. 23100-2Y005 and 23100-2Y900 are Nissan references, 2310031U00 and 2310031U01 are Nissan internal numbers, and A13826, 283547, and 13826 are the Mitsubishi original-equipment references. The LRA01755 and LR1110729C are aftermarket interchange numbers. All resolve to the 12V 110A 6PK unit for the Maxima and I35 V6 range.

Q: My Maxima shows a battery warning but the battery is new. What else could it be?

A: On the Maxima A32 and A33, the most common causes of a battery warning after a new battery are a weak alternator, a failing idler or tensioner bearing, or a poor B+ connection. The V6 accessory belt run shares the same serpentine belt for the power steering, the air conditioning, and the water pump, so a failing idler bearing loads the belt and can mimic a weak alternator under load. Check the idler and tensioner by spinning them by hand; if they feel rough or noisy, replace them at the same time as the alternator. Then run the 2000 rpm load test: with the lights, blower, and air conditioning on, voltage should hold 13.8 to 14.4V.

Q: Is 110A enough for a Maxima with a lot of electrical add-ons?

A: For a standard Maxima A32 or A33, 110A covers the factory fuel injection, variable valve timing, air conditioning, and climate system comfortably. If the car carries added load from an aftermarket audio system, additional lighting, or other accessories, measure the total draw at 2000 rpm and confirm it stays under the 110A ceiling with margin. In that case, a higher-output alternator or a second battery is the right approach, and match it by part number rather than assume this unit will carry the extras.

Q: Can I fit this myself?

A: The replacement is a manageable job with basic tools. Disconnect the negative battery terminal, unplug the regulator connector, remove the B+ nut, slacken the adjustment and pivot bolts, swing the unit out, and refit in reverse order. Allow one to two hours. Check the idler and tensioner while the belt is off, because worn bearings there will destroy a new belt and affect the new alternator's output. Set the belt tension to about 10 to 15mm deflection at the midpoint of the longest run under thumb pressure, and recheck after a short run.

Q: Does this fit the Infiniti I35?

A: The Infiniti I35 shared the Maxima platform and the VQ25DE engine, and it uses the same alternator family. The 23100-2Y005, 23100-2Y900, and A13826 references all apply to the I35 as well as the Maxima. Confirm the part number, the 6PK pulley, and the 110A rating against the old unit before ordering.

Q: What is the lead time and warranty?

A: Units are in current stock with a 10-day lead time for dispatch. All units carry a one-year warranty from the date of installation. Warranty claims require documentation of the vehicle and part number. Check specific terms for commercial or fleet use.

In Practice

The independent Nissan specialist will see the Maxima A32 or A33 at high mileage with a battery warning or dimming lights that the owner blames on a flat battery. The diagnostic that earns the job is the 2000 rpm load test combined with a check of the idler and tensioner: at 2000 rpm with the lights, blower, and air conditioning on, voltage should hold 13.8 to 14.4V. If voltage is low, check the idler and tensioner by hand before condemning the alternator, because a failing idler bearing loads the belt and mimics a weak alternator. Replacing both the idler and the alternator at the same time avoids a come-back.

For the import specialist, the cross-reference list is the leverage. The same Mitsubishi-design alternator goes under the Nissan 23100-2Y005, the Infiniti reference, and the Lucas and WAI interchange numbers, so a counter that stocks one number covers the full Maxima and I35 range across all three VQ engine displacements. The neutral kraft packaging also suits distributor and parts-counter environments.

For the technician, the checks that prevent a come-back are the idler, the tensioner, the belt, and the B+ terminal. The V6 accessory belt run is shared, so a failing idler bearing affects everything on the front of the engine and reads as an alternator fault under load. Spin the idler by hand; if it feels rough, replace it with the belt at the same time. Clean the B+ terminal and the chassis earth, because a poor connection on a Maxima of this age produces a voltage drop that looks exactly like a weak alternator. Photo the harness route before removal to confirm the replacement is correct the first time.

About the Author

David Johansson is an automotive aftersales engineer based in Gothenburg, Sweden, with a professional focus on Japanese premium sedans in the European aftermarket. He holds a degree in automotive engineering from Chalmers University of Technology, where his studies covered automotive electrical systems and the charging requirements of multi-cylinder petrol engines.

After graduation, David worked for a Swedish parts distributor specialising in Japanese brands, with the Nissan Maxima and Infiniti I35 among his core responsibilities alongside Volvo models. Over fourteen years he advised independent workshops across Scandinavia on correct parts identification and electrical diagnosis for the VQ20DE, VQ25DE, and VQ30DE engines. His workshop experience taught him that the Maxima A32's electrical load was high for its era, and that a 110-amp alternator was Nissan's answer to keeping the fuel injection, the variable valve timing, and the comfort systems running without draining the battery at idle. He learned to check the idler and tensioner before condemning the alternator, because a failing idler bearing loads the belt and mimics a weak alternator under load on the shared V6 accessory belt run.

In his current work David supports independent Japanese-car specialists and parts distributors on coverage and cross-referencing for the 23100-2Y005 charging system, with a focus on the Maxima A32 and A33 and the Infiniti I35 across the VQ engine range. He maintains a cross-reference set covering Nissan, Mitsubishi, Lucas, Remy, and WAI numbers for the 110A 6PK alternator, and contributes technical notes to regional trade publications on 1990s Japanese sedan electrical diagnosis and preventive maintenance for high-mileage VQ engines. He has a personal interest in the VQ engine family and its reputation as one of the most respected six-cylinder designs of the 1990s, and in the practical challenges of keeping the charging systems on these cars working reliably at the mileage they now carry.