If your car has been having trouble starting, the battery keeps dying, or the lights are dimming, you might have a failing alternator on your hands. The alternator is a crucial component of your vehicle’s electrical system, responsible for keeping the battery charged and powering all the electronics while the engine is running. When it starts to fail, it can cause all sorts of problems.
Telltale signs your alternator is on the way out
There are several symptoms that can indicate a failing alternator:
- Battery warning light: If the battery warning light on your dash illuminates, it could mean the alternator isn’t charging the battery properly.
- Dim or flickering lights: When the alternator fails to provide consistent voltage, your headlights, interior lights, and dash lights may appear dimmer than usual or flicker erratically.
- Weak or dead battery: If your battery frequently dies or needs jump-starts, the alternator might not be recharging it sufficiently.
- Strange noises: A failing alternator can produce grinding, whining, or growling sounds due to worn bearings or other internal issues.
- Burning smell: If you detect a burning rubber or electrical odour, it could indicate an overworked alternator or damaged wires.
- Malfunctioning accessories: Power windows, seat warmers, the radio, and other electrical components may operate slowly or sporadically when the alternator can’t supply enough power.
- Stalling or difficulty starting: In advanced stages of alternator failure, the engine may stall frequently or have trouble starting because it’s not receiving sufficient electrical power.
So what causes an alternator to fail? Age and wear are the most common culprits. The alternator is under constant stress, spinning at high speeds to generate electricity. Over time, the bearings wear out, the belt that drives it can become misaligned or slip, and the internal components can break down. Exposure to extreme heat, water, or other contaminants can also lead to premature failure.
Getting your alternator fixed
If you suspect your alternator is failing, it’s important to have it checked out by a professional mechanic as soon as possible. They can perform a charging system test to confirm the diagnosis and determine the extent of the damage.
In most cases, a failing alternator will need to be replaced. This involves removing the old unit, disconnecting the wiring harness, and installing a new alternator. The serpentine belt that drives the alternator may also need to be replaced if it’s worn or damaged. Depending on the make and model of your vehicle, you can expect to pay anywhere from $500 to $1000+ for an alternator replacement in New Zealand.
At My Auto Shop, our mobile mechanics can come to you to diagnose and repair your alternator issues. We use high-quality replacement parts and offer upfront, competitive pricing. With our convenient mobile service, you can get your car fixed at home or at work, without the hassle of dropping it off at a shop.
Don’t let a failing alternator leave you stranded. If you’re experiencing any of the symptoms mentioned above, give us a call or book an appointment online. Our friendly, experienced mechanics will get your car back on the road in no time.