Alternators

Alternators for Cars, SUVs and Pickups at Easy Life Markets

Easy Life Markets sells alternators for petrol cars, SUVs and pickups, listed by part number, amperage, pulley type and the vehicles the supplier names for each unit. An alternator keeps the battery charged and powers the lights, fans and electronics while the engine runs, so when it fails the car soon stops.

To buy the right one, start with the number on your old alternator, then confirm the amp rating, the pulley and the plug connector. If those match, you have your part. Our current range covers BMW, Toyota, Lexus, Honda, Hyundai, Kia, Ford and Volvo applications, and it sits inside our electrical parts section of the main auto parts store.

What an Alternator Does

An alternator is a small generator driven by the engine through the accessory belt. As the pulley turns, a spinning magnetic field inside the unit produces alternating current. A set of diodes, called the rectifier, turns that into direct current, and a voltage regulator holds the output at a steady level for a 12V system. Most modern units have the regulator built in.

The alternator has two jobs. First, it replaces the energy the battery used to start the engine. Second, it supplies everything electrical while you drive: headlights, wipers, heater fan, infotainment, fuel pump and engine computer. The battery only covers the gap when demand is high or the engine is at idle. If you want the full technical background, the automotive alternator article on Wikipedia explains the parts and how they work together.

Signs Your Alternator Is Failing

Car alternators usually give warnings before they stop completely. Look out for these:

• Battery warning light on the dash while driving. This is the most common sign of a charging fault.
• Dim or flickering lights that brighten when you rev the engine.
• A battery that keeps going flat, even after a full charge or a new battery.
• Whining, grinding or rattling from the front of the engine, which can point to worn bearings or a failing pulley.
• A burning or hot electrical smell, which can come from an overworked unit or a slipping belt.
• Electrical oddities such as slow windows, a weak heater fan or warning lights coming and going.

None of these prove the alternator is at fault on their own. A slipping belt, a loose cable, a corroded earth strap or a worn battery can give the same symptoms. That is why testing comes first.

Test Before You Buy

A simple voltage check tells you a lot. With the engine off, a healthy, charged battery reads around 12.6 volts. With the engine running, a working charging system raises that figure noticeably, usually into the high 13s or low 14s. If the reading with the engine running is no higher than with it off, the alternator is not charging.

A handheld tester makes this easy. The BST100 battery tester in our battery accessories range checks the battery, cranking and charging system on 12V vehicles. If the battery tests weak, charge it fully and test again before you blame the alternator, because a dead battery can overload even a healthy unit.

Also check the belt. A glazed, cracked or loose belt will slip on the pulley and reduce charging. Check the main output cable and the earth strap for corrosion and tightness. Only once these are clear is a replacement the right answer.

How to Choose a Replacement Alternator

An alternator must fit three things: the mounting points on the engine, the belt drive and the wiring. These are the details to check.

Part number and interchange references

Your old unit has a label or stamped number. Match that number, or one of the interchange references, to the listing. Most of our car alternators are titled with the main reference so you can search for it directly. If the label is gone, use your vehicle's make, model, year and engine size, then compare photos carefully.

Amperage

The amp rating is the maximum current the unit can produce. Our current range spans 100A to 220A. Match the rating of your original unit. A higher rating from the same family is normally fine if it fits the same mounts and plug, but a lower rating may not keep up with the car's electrical demand.

Pulley type and groove count

The pulley must match your belt. Count the grooves on the old pulley; six and seven grooves are common. Check also whether it is a solid pulley, a one-way clutch pulley or a decoupler pulley. Clutch and decoupler pulleys reduce belt vibration on some engines and should be replaced like for like.

Rotation direction

Most units turn clockwise when viewed from the pulley end, but some turn counterclockwise. The 6G910300MA Volvo alternator, for example, is listed with counterclockwise rotation. The fan and regulator are designed for one direction, so this must match.

Plug connector and mounting ears

Compare the plug on the back of the unit and the position of the mounting ears and bolt holes with your old part. A plug that looks similar but has a different pin layout will not work.

Comparison Table of Our Current Range

The table below uses the figures the supplier gives on each product page. Always read the full listing for the complete list of vehicles and reference numbers before you order.

Car Alternators by Vehicle Type

Small and mid-size four-cylinder cars

Four-cylinder sedans and crossovers usually run alternators in the 100A to 150A range, while bigger engines and well-equipped SUVs often use larger alternators. In our current range, the Camry RAV4 2.5L alternator, the Accord 2.4L alternator and the Hyundai Sonata alternator fit this group. The Sonata unit is also listed for several Kia Optima, Sorento and Sportage models that share its engines.

Six-cylinder and luxury cars

Larger engines and cars with more electrical equipment tend to use higher-output units. The BMW 180A alternator covers later inline-six models, while the BMW 120A alternator covers earlier ones. The 27060-0P140 alternator covers several Toyota and Lexus V6 applications.

Pickups and V8 engines

Trucks often carry extra lights, winches and accessories, so they need more current. The F-150 5.0L alternator is rated at 220A, the highest output in our current range.

New, Remanufactured and Rebuilt Units

Replacement car alternators reach the market in a few forms. A new unit is built from new parts throughout. A remanufactured unit starts with a used core that is stripped, cleaned and rebuilt with new wear parts such as bearings, brushes, regulator and diodes, then tested. A rebuilt or repaired unit may only have the failed part replaced. Each of the alternators in our range carries what the supplier tells us about the unit, so read the description for the condition before you buy. The 6G910300MA alternator, for example, is described by the supplier as new.

Some sellers in the trade charge a core deposit and refund it when you return the old unit. Our listings show the price of the unit itself. If you have a question about what to do with your old part, ask us before you order.

Matching Output to Electrical Load

Every car is built with an alternator sized for the equipment it left the factory with. Problems start when owners add a lot more. Extra driving lights, a powerful sound system, a winch, a fridge in the back or a second battery all draw current. If the total demand at idle is more than the unit can supply, the battery slowly drains even while the engine runs.

If you have added accessories, add up their rated current and compare it with the alternator's amp rating, leaving a margin for the car's own systems. Remember that an alternator produces less at idle than at cruising speed. If the numbers are tight, a higher-output unit that fits the same mounts and plug can help, and so can using heavy loads only with the engine running above idle.

Quick Charging Fault Checklist

Work through these points in order when the battery light comes on. It takes a few minutes and often finds the fault without buying anything.

• Is the belt on, tight and in good condition?
• Are the battery terminals clean and tight?
• Is the main alternator cable tight at both ends?
• Is the engine earth strap clean and secure?
• Does the battery hold a charge after a full charge from the mains?
• Does the voltage rise with the engine running?

If the answer to the last question is no after everything else checks out, the alternator is the likely cause and a replacement from our range is the next step.

Fitting a Replacement Alternator

On many cars, swapping one of our car alternators for the old unit is a reasonable job for a confident home mechanic with basic tools. On others it sits deep in the engine bay and is better left to a workshop. Either way, these general steps apply.

1. Disconnect the negative battery cable first. The main alternator cable is live at all times, and touching it to metal with the battery connected causes a short.
2. Take a photo of the belt routing, or find the diagram under the bonnet, before you remove the belt.
3. Release the belt tensioner and slip the belt off the alternator pulley.
4. Unplug the connector and remove the main output cable.
5. Remove the mounting bolts and lift the old unit out.
6. Compare old and new units side by side: mounts, plug, pulley and output terminal.
7. Fit the new unit, refit the cable and plug, refit the belt and check its routing.
8. Reconnect the battery and check the charging voltage with the engine running.

Fit a new belt if the old one is cracked, shiny or stretched. A worn belt can make a new alternator look faulty. Charge the battery fully before fitting, because using a new alternator to recharge a deeply flat battery puts it under heavy load from the start. Our VEVOR smart battery charger is one way to do that. Use the tightening figures from your vehicle's service information, and if you are unsure about any step, have the unit fitted by a qualified mechanic.

Care Tips That Help an Alternator Last

• Keep the battery healthy. A failing battery makes the alternator work harder all the time.
• Check the belt and tensioner at each service. Slip and vibration both cause wear.
• Fix oil and coolant leaks above the alternator. Fluid getting inside damages the windings and bearings.
• Avoid adding heavy electrical loads beyond what the vehicle was built for unless the unit is rated for them.
• Keep the main cable and earth connections clean and tight.

Related Parts in the Electrical Range

Charging and starting problems often overlap, so it helps to know the neighbouring sections. A car that will not crank may need a part from our starters section. A misfire is more often an ignition coil fault. Damaged cables and plugs can be replaced from our wiring harnesses range, and charging warnings sometimes come from a faulty part in our sensors range. For a flat battery today, a portable pack such as the 800A jump starter gets you moving while you sort out the cause.

Who Our Alternators Suit

Our alternators suit car owners who have tested their charging system and know the unit has failed, home mechanics who like to do their own repairs, and workshops looking for a unit by reference number. They are not a guess-and-see part. If you match the number, the amps, the pulley and the plug, you have the best chance of a part that bolts straight in.

Buying Car Alternators From Easy Life Markets

Every listing shows the supplier's reference numbers, the listed vehicles and clear photos of the unit from several angles, so you can compare it with your old part. The current price and availability are shown on each product page. If you are not sure which unit fits, send us the number from your old alternator and your vehicle details through our contact page before you order. Delivery information is on our shipping policy page, returns are explained in our return and refund policy, and other questions are answered in our FAQ.

Frequently Asked Questions

How do I know which alternator fits my car?

Match the part number on your old unit to the reference numbers in our listings. Then confirm the amp rating, pulley, rotation and plug. If the number is missing, contact us with your vehicle's make, model, year and engine size.

Can I fit a higher-amp alternator than the original?

Often yes, if it shares the same mounts, pulley and plug. A higher rating does not force extra current into the car; the electrical system only draws what it needs. Do not fit a lower rating than the original.

Will a new alternator fix a dead battery?

No. A deeply flat or worn battery needs charging or replacing. Fit the new alternator with a healthy, charged battery, or the new unit will be overworked.

What is a decoupler or clutch pulley?

It is a pulley with a one-way clutch or a spring inside. It lets the alternator freewheel slightly and smooths out belt vibration. If your old unit had one, the replacement should too.

How long do car alternators usually last?

There is no fixed figure. Life depends on mileage, heat, belt condition, battery health and electrical load. Regular belt and battery checks help an alternator reach a long service life.

Can I drive with a failing alternator?

Only for a short distance. Once the alternator stops charging, the car runs on the battery alone until it goes flat, and the engine will then stop. Switch off unneeded loads and get it checked as soon as you can.

Do I need a new belt when I replace the alternator?

It is a good idea if the belt is worn, cracked or glazed. A new belt on a new pulley gives the best grip and avoids a slipping belt being mistaken for a charging fault.