A Guide to Replacing the Alternator on Your 1999-2011 Saab 9-5
Keep your Saab's sensitive electronics powered correctly by choosing the right new aftermarket alternator.
- The original alternator is a Bosch unit; choosing a new Bosch aftermarket part offers the best quality and fit.
- Replacement is a difficult job due to the alternator's location, often requiring engine mounts to be removed and the engine to be jacked up.
- While replacing the alternator, it is wise to also replace the serpentine belt, tensioner, and inspect idler pulleys.
- Ensure your battery is in good health, as a weak battery can cause a new alternator to fail prematurely.
Is Your Saab 9-5 Alternator Failing?
A failing alternator in a Saab 9-5 can cause a range of electrical problems. Because these cars are so dependent on stable voltage, symptoms often appear before the alternator fails completely. Recognizing the signs early can prevent you from getting stranded.
🎬 Watch: A quick guide on how to tell if your alternator is bad.Common Symptoms Include:
- Battery Warning Light: The most obvious sign is the battery-shaped warning light on your dashboard. This light indicates a problem in the charging system, which could be the alternator.
- Dimming or Flickering Lights: You might notice the headlights and interior lights dim or flicker, especially when the engine is at idle or when you use other accessories like the power windows. Some owners report lights getting brighter if the voltage regulator fails and overcharges.
- Slow or Malfunctioning Electronics: Power windows that operate slowly, a radio that cuts out, or other strange behavior from electronic accessories can point to a weak alternator.
- Whining or Growling Noises: A whining sound from the engine bay that changes pitch with engine RPM often points to failing bearings inside the alternator. 🎬 Listen: Hear what a failing alternator sounds like in this video.
- Difficulty Starting: If the alternator isn't recharging the battery properly, the battery will eventually lose its charge, leading to a slow crank or a no-start condition.
- Stalling Engine: In some cases, a failing alternator may not provide enough power to the ignition and fuel systems, causing the engine to stall while driving.
Oil Leaks Can Kill Alternators
Saab 9-5 engines can be prone to oil leaks. If oil drips onto the alternator or the serpentine belt, it can cause the belt to slip or degrade, leading to premature alternator failure or a snapped belt. If you are replacing your alternator, inspect the area above it for any signs of oil leaks and address them to protect your new part.
Choosing a New Aftermarket Alternator
Your Saab 9-5 originally came with a Bosch alternator. When choosing a replacement, you have several options that range in quality and price. For a vehicle with sensitive electronics like the 9-5, opting for a higher-quality unit is a smart investment.
Brand Quality Tiers
- Tier 1 (Best Quality): Bosch (New)
Bosch is the Original Equipment Manufacturer (OEM) for Saab. Choosing a new Bosch alternator is the closest you can get to the original part's quality and reliability. They are known for durability and are built to the exact specifications your car requires. - Tier 2 (Good Quality): Remy, WAI Global (New)
Brands like Remy and WAI Global offer quality new alternators that are a good balance of price and performance. WAI is known for testing every new unit and sometimes includes the test results in the box. Remy is another established brand in the aftermarket. These are solid choices if a new Bosch is outside your budget. - Tier 3 (Standard Quality): BBB Industries, MPA (Remanufactured)
These brands often offer remanufactured units. While more affordable, the quality of remanufactured parts can be inconsistent. They can be a viable option, but there is a higher risk of premature failure compared to a new unit from a top-tier brand.
New vs. Remanufactured
A new alternator is made with all-new components and has never been installed in a vehicle. A remanufactured alternator is an old unit that has been rebuilt with new and reconditioned parts. For the Saab 9-5, a new alternator from a reputable brand like Bosch or WAI is generally recommended for better reliability and longevity.
Cost of Replacing a Saab 9-5 Alternator
The cost can vary significantly based on the part you choose and labor rates in your area. The replacement is a moderately difficult job due to tight spacing in the engine bay.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Alternator | $207 - $385 |
| Shop Labor | $220 - $320 |
| Total Estimated Cost | $427 - $705 |
Note: Prices are estimates and can vary. This does not include taxes or potential costs for related repairs, like a new serpentine belt or tensioner.
Frequently Asked Questions (FAQ)
Is replacing the alternator a DIY job?
For an experienced DIY mechanic, it is possible. However, the alternator is buried deep in the engine bay against the firewall, making access very difficult. The job requires removing the engine mount, jacking up the engine, and potentially moving other components. It can take 2-3 hours for someone with experience. If you are not comfortable with this level of work, professional installation is recommended.
🎬 See this 2.3L alternator replacement walkthrough for a step-by-step DIY guide.Should I replace the serpentine belt and tensioner at the same time?
Yes, it is highly recommended. The serpentine belt and tensioner must be removed to access the alternator. Since they are already off, replacing them with new parts is a cost-effective way to prevent future problems. Always inspect the idler pulleys for wear as well.
Are there any recalls for the Saab 9-5 alternator?
There are no specific recalls listed by the NHTSA for alternator failure on the 1999-2011 Saab 9-5. There have been recalls for other issues, such as airbags.
Can a bad battery damage a new alternator?
Yes. A battery that cannot hold a proper charge forces the alternator to work constantly at maximum output, which can cause it to overheat and fail prematurely. Always test your battery and replace it if it's weak before installing a new alternator.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5394492 5246392 4966704
Amperage ratings for the Saab 9-5 typically range from 130A to 140A depending on the engine and year. The alternator uses a serpentine belt and may have a standard or decoupler pulley.
We Have This Part in Stock
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.
- Saab 9-5: