Subaru Outback Engine Intake Manifold Gasket Set Guide (2011-2019)
Fixing rough idles and check engine lights on your 2011-2019 Outback starts with the right intake manifold gasket.
- A Check Engine Light with code P0171 is the most common sign of a failed intake manifold gasket on your Outback.
- Symptoms like rough idle, hesitation, and poor gas mileage are directly related to the vacuum leak caused by the bad gasket.
- High-quality aftermarket brands like Reinz and Beck Arnley are reliable and cost-effective alternatives to OEM parts.
- Never reuse old gaskets; replacement is mandatory anytime the intake manifold is removed.
Is Your Outback Running Rough? It Could Be the Intake Manifold Gaskets
If your 2011 to 2019 Subaru Outback is experiencing a rough idle, poor acceleration, or a persistent Check Engine Light, a failing engine intake manifold gasket could be the culprit. These gaskets are critical for sealing the intake system. When they fail, they create a vacuum leak, allowing extra air into the engine that the mass airflow sensor doesn't measure. This throws off the air-fuel ratio, leading to a variety of noticeable problems.
Symptoms of a Bad Intake Manifold Gasket
A leak in the intake manifold gasket will almost always cause issues. The most common sign is a Check Engine Light with the code P0171 (System Too Lean), which means the oxygen sensors are detecting too much air in the exhaust. 🎬 Watch: How to diagnose P0171 and P0457 codes on a Subaru. Other symptoms include:
- Rough or Shaky Idle: The engine may vibrate or feel like it's about to stall when you're stopped.
- Engine Hesitation: When you press the gas, the car might stumble or hesitate before accelerating smoothly.
- Hissing Noise: You might hear a distinct hissing or whistling sound from the engine bay, which is the sound of air being sucked through the bad gasket. 🎬 Watch: A simple trick to find hidden vacuum leaks yourself.
- Reduced Fuel Economy: Your engine is running inefficiently, causing you to use more gas than usual.
Potential for Overheating
On some engine designs, coolant also passes through the intake manifold. A failed gasket could cause a coolant leak, leading to engine overheating, which can cause severe damage like a blown head gasket if not addressed quickly.
Choosing the Right Aftermarket Gasket Set
For a part like an intake manifold gasket, you don't necessarily need to buy from the dealer. High-quality aftermarket brands often meet or exceed OEM specifications. For your Outback, here’s a look at the available brands:
- Reinz (Victor Reinz): Often an Original Equipment Manufacturer (OEM) for many European and some domestic brands, Reinz gaskets are widely considered to be of very high quality and a reliable choice, comparable to the original Subaru part.
- Beck Arnley: This brand is known for sourcing parts from various manufacturers, including OEM suppliers. A Beck Arnley gasket for your Subaru is often the same part you'd get from the dealer, just in a different box, making it an excellent option.
- Victor Gaskets: This is another name associated with Dana Incorporated, the same parent company as Victor Reinz. Quality is generally considered good and on par with other top-tier aftermarket brands.
Pro Tip: When replacing the gaskets, it's a good time to clean the throttle body and inspect nearby vacuum hoses for any cracks or wear, as these can cause similar symptoms.
Cost to Replace Intake Manifold Gaskets on a 2011-2019 Outback
The cost of the gasket set itself is low, but the repair involves significant labor to access the manifold. 🎬 See this step-by-step walkthrough for removing the Subaru intake manifold. Below are typical cost estimates.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Gasket Set | $24 - $52 |
| Shop Labor | $240 - $450 |
| Total Estimated Cost | $264 - $502 |
Frequently Asked Questions
Is an OEM gasket from Subaru better than aftermarket?
Not necessarily. Brands like Reinz and Beck Arnley often supply the original parts to Subaru or make gaskets to the exact same standards. For this part, a quality aftermarket gasket is a perfectly reliable and more affordable choice.
How urgent is this repair?
It's moderately urgent. While you can usually drive the vehicle, a vacuum leak can cause poor performance, bad fuel economy, and potential stalling in traffic. If the leak involves coolant, it becomes much more critical to avoid engine overheating.
Can I reuse my old intake manifold gaskets?
No. Gaskets are single-use parts. They are designed to crush and create a seal when torqued down. Once removed, they will not seal properly again. Always use new gaskets for this repair.
Are there any recalls for this issue?
There are no specific recalls from the NHTSA for intake manifold gasket failure on the 2011-2019 Subaru Outback. However, there was a recall for a fuel pump issue on some 2018-2019 models which can cause stalling, a symptom that can sometimes be confused with a severe vacuum leak.
Helpful Videos
Technical Specifications
OEM Part Numbers: 14035AA68A
This is a set of two lower intake manifold gaskets, one for each cylinder head on the 2.5L engine. They are typically made of a multi-layered steel (MLS) or a high-quality composite material designed to withstand engine heat and pressure.
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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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