A Guide to the Alternator for the 2011-2015 Kia Sorento
Everything you need to know before replacing the alternator on your second-generation Sorento.
- The alternator replacement on the 2011-2015 Sorento is a difficult job due to tight spacing, often requiring professional installation.
- Check for vehicle-specific service bulletins, like SA061 for 2011 3.5L models and ENG 126 for 2013 2.4L models, which directly relate to alternator issues.
- Choose your replacement brand wisely; Mando and Valeo are OE suppliers, Denso is a top-tier aftermarket option, while store brands are typically remanufactured.
- Driving with a failing alternator is risky, as the vehicle will stall once the battery's reserve power is depleted.
Is Your Sorento's Alternator Failing?
An alternator doesn't usually fail without warning. For the 2011-2015 Sorento, there are several common signs that point to a problem with your charging system. Ignoring them can leave you stranded.
Key Symptoms of a Bad Alternator
- Battery Warning Light: The most obvious sign is the battery-shaped warning light on your dashboard. This indicates a problem in the charging system.
- Dim or Flickering Lights: Headlights and interior lights may appear dim, flicker, or change brightness as you rev the engine. This happens because the alternator can't provide consistent power.
- Slow Starting or Dead Battery: If the engine cranks slowly or you have a battery that keeps dying, the alternator may not be recharging it properly.
- Strange Noises: A grinding or whining sound from the engine bay can indicate failing bearings inside the alternator.
- Electrical Problems: You might notice random electrical glitches, like power windows moving slowly or the radio acting up.
- Burning Smell: A smell of burning rubber or hot wires can be caused by a struggling alternator or a slipping belt.
Known Issues for 2011-2015 Sorento Alternators
There are a few documented issues for this generation of Sorento that owners should be aware of:
- Service Action SA061 (SA118): Some 2011 Sorento models with the 3.5L V6 engine were subject to a service action for alternators with a faulty internal voltage regulator. This could cause the charging system warning light to come on and lead to a no-charge condition, requiring the alternator to be replaced.
- TSB ENG 126: For certain 2013 Sorento models with the 2.4L GDI engine, Kia issued a Technical Service Bulletin to address idle instability. The fix involved replacing the original alternator pulley with an Overrunning Alternator Pulley (OAP) and updating the engine control software.
- Related Recall: While not a direct alternator recall, a major recall (NHTSA 23V-652) was issued for a potential electrical short in the Hydraulic Electronic Control Unit (HECU) that could cause an engine compartment fire. This highlights the importance of maintaining a healthy electrical system.
Choosing the Right Aftermarket Alternator
When shopping for a new aftermarket alternator, you'll find a wide range of brands and prices. The original alternators for your Sorento were made by Mando and Valeo, which are considered Original Equipment (OE) quality.
Pro Tip: Before ordering, confirm your Sorento's engine size (2.4L 4-cylinder or 3.5L V6) and the required amperage of your alternator. Some models use a 110-amp unit, while others require a 150-amp unit.
Brand Quality Tiers
Not all aftermarket brands are created equal. Here’s how they generally stack up for your Kia:
- Tier 1: OE & Premium Aftermarket (Mando, Valeo, Denso): Mando and Valeo are the original suppliers. Buying one of these brands ensures a direct, factory-spec replacement. Denso is a highly respected brand known for making reliable, long-lasting parts that often meet or exceed OE standards. These are your best but often most expensive options.
- Tier 2: Quality New Aftermarket (WAI Global): Brands like WAI Global typically offer brand-new units, not remanufactured ones. They are a solid choice for owners looking for a balance of quality and value. Some sources suggest WAI units may use OE components, like those from Valeo.
- Tier 3: Remanufactured & Store Brands (BBB Industries, MPA, Remy): These brands often supply the remanufactured alternators sold at large auto parts stores. While they are the most budget-friendly, quality can sometimes be inconsistent, with some owners in forums reporting premature failures.
Alternator Replacement Cost for 2011-2015 Kia Sorento
The cost to replace the alternator can vary significantly based on the part you choose and labor rates in your area. The installation is more difficult than on many other vehicles, which increases labor costs.
| Item | Estimated Cost |
|---|---|
| Shop Labor | $290 - $430 |
| New Aftermarket Part | $115 - $505 |
| New OEM Part | $690 - $745 |
| Total Professional Replacement | $405 - $1175+ |
Frequently Asked Questions (FAQ)
Is it hard to replace the alternator on a 2011-2015 Sorento?
Yes, this is considered a difficult job. The alternator is in a very tight spot. On the 2.4L engine, mechanics often have to move the A/C compressor and slightly raise the engine to get enough clearance to remove the alternator. It is not recommended for a beginner DIYer.
Can I drive my Sorento with a bad alternator?
It is not recommended. A failing alternator cannot recharge the battery. Your car will run on battery power alone for a short time until the battery is completely drained, at which point the engine will stall. This can happen without much warning, leaving you stranded.
Do I need to replace the serpentine belt at the same time?
It is highly recommended. The serpentine belt must be removed to access the alternator. Since you are already paying for the labor to remove it, replacing the belt at the same time is a smart and cost-effective maintenance step.
What is an alternator pulley and why does it matter?
The pulley is the wheel on the front of the alternator that the serpentine belt spins. For 2013 Sorento models, Kia issued a TSB to switch from an Alternator Dampening Pulley (OAD) to an Overrunning Alternator Pulley (OAP) to fix idle issues. It's important to ensure your replacement alternator has the correct type of pulley for your specific vehicle.
Helpful Videos
Technical Specifications
OEM Part Numbers: 37300-2G850 37300-2G800 37300-2G950 37300-2G900
Amperage: 110A or 150A depending on engine and trim level. Pulley: 6-Groove Clutch Pulley. Some 2.4L models require a specific Overrunning Alternator Pulley (OAP). Voltage: 12V. Rotation: Clockwise.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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