Is a 2016 WRX STI reliable?

In short, the 2016 WRX STI is not exceptionally unreliable, but it isn’t a budget-friendly, ultra-low-maintenance choice either. Its reliability sits around average for a high-performance turbocharged sedan, and ownership costs can be higher than non-turbo rivals. A well-documented maintenance history and careful ownership make a big difference.

Reliability for the 2016 WRX STI depends on several factors: how well the car has been maintained, the mileage, how it has been driven (daily commuting vs. spirited tracking), and whether the car has been modified. Subarus from this era are known for sturdy all-wheel-drive hardware and strong resale appeal, but turbocharged engines and performance components require diligent upkeep to avoid costly repairs down the line.

What affects reliability in the 2016 WRX STI

The STI’s reliability profile is shaped by its turbocharged engine, drivetrain hardware, and the level of preventive maintenance it has received. Issues tend to arise from wear on high-stress components, cooling system maintenance, and early-age wear on seals and gaskets if service intervals were neglected.

Engine and powertrain reliability

Engine design and known concerns

The 2016 WRX STI uses a 2.5-liter turbocharged flat-four engine (often referred to as the EJ257 in this generation) producing about 305 horsepower. Like other turbocharged Subarus, it rewards regular, quality maintenance but can show higher wear if oil changes and cooling system service are delayed. Common powertrain concerns reported by owners include turbocharger wear, intake carbon buildup on direct-injected engines, and occasional oil or coolant leaks around gaskets and seals. Proper lubrication, timely cooling system checks, and avoiding excessive revving when the engine is cold can help extend reliability.

Common issues reported by owners

Before listing typical problems, it’s helpful to note that experiences vary widely depending on mileage, maintenance history, and how the car has been used. Below is a compilation of issues most frequently cited by owners and service reports for the 2016 WRX STI.

• Oil consumption and minor leaks around valve covers or gaskets, especially as mileage increases.


• Turbocharger wear or failure signs, including reduced boost or unusual whine, particularly on high-mileage examples.


• Clutch wear and related manual transmission wear in high-mileage or aggressively driven cars.


• Intercooler/charge-air cooling hose wear or leaks, which can affect performance and boost stability.


• Cooling system maintenance needs, including radiator hoses, water pump wear, and reservoir leaks, which can lead to overheating if neglected.


• Carbon buildup on intake valves (a common direct-injected engine issue) requiring periodic cleaning at higher mileages.


• Electrical or infotainment quirks and occasional sensor-related faults, which are not universal but reported in some cars.

Concluding note: while these issues are not universal, a notable share of owners report higher maintenance needs for performance-tuned Subarus when the odometer climbs, and the cost of repairs and parts tends to be higher than for non-turbo or non-performance models.

Maintenance costs and ownership experience

Maintenance on a 2016 WRX STI tends to be pricier than ordinary compact cars due to turbocharging, performance components, and specialty repair needs. Prospective owners should budget for regular high-quality oil changes, timing/belt-related items if applicable, cooling system service, and potential turbo or clutch work as mileage increases. Some owners report costs that reflect a premium on parts and specialized service, especially when the car has been driven hard or modified.

• Regular oil changes with quality synthetic oil (often every 3,000–5,000 miles, depending on oil type and usage).


• Spark plugs and ignition components typically scheduled every 60,000–100,000 miles, depending on maintenance history.


• Clutch replacement or inspection for manual transmissions at higher mileages or with aggressive driving.


• Cooling system maintenance, including water pump and hoses, to prevent overheating and related damage.


• Turbocharger service or rebuilds may be necessary on high-mileage examples or after hard driving; factor in potential higher repair costs.

Concluding paragraph: if you prioritize reliability, expect higher ongoing maintenance costs than non-turbo or non-performance cars, and be prepared for potential repairs on a vehicle that can deliver high-performance driving when well cared for.

How to assess a used 2016 WRX STI

To gauge reliability before purchase, follow these steps and checks. A thorough pre-purchase inspection (PPI) by a technician familiar with Subarus and turbocharged engines is essential. Verify maintenance records (oil-change history, cooling system work, turbo servicing, Clutch replacement if applicable). Inspect for leaks (oil, coolant, or intercooler hoses), check compression and leak-down if engine condition is a concern, test boost behavior, and listen for unusual turbo noises. Review any history of modifications, as extensive aftermarket work can change reliability and durability. Finally, confirm recalls and service campaigns have been completed by a dealer.

Bottom line

The 2016 WRX STI can be a reliable performer with proper care. Its reliability sits around average for a high-performance turbocharged car, but ownership costs and potential turbo/engine wear mean you should approach with careful maintenance discipline and a thorough pre-purchase inspection. A well-maintained, unmodified example with documented service history is typically the most reliable option in this model year range.

Summary

For prospective buyers or current owners, reliability of the 2016 WRX STI hinges on maintenance discipline, mileage, and recent service history. While it delivers exceptional performance and capable all-wheel drive, it requires attentive upkeep and readiness for higher-than-average repair costs compared with non-turbo peers. A detailed PPI, honest service records, and sensible ownership (avoiding track-driven abuse without appropriate maintenance) are the best predictors of long-term reliability.

How many miles does a WRX STI last?

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Is a 2016 STI reliable?

Fun yet reliable and could hold the whole family.
This car is a lot of fun to drive and safe at the same time. I could use it for fun but also could fit all 3 of my kids in it as well. I've kept this car very well maintained and have done a few extras on it as well.

What year of WRX STI is most reliable?

The most reliable WRX STI years are generally considered to be 2017-2021 and 2022 onwards, as Subaru addressed many of the issues in earlier models. The 2017-2021 models, in particular, are praised for their reliability due to improvements that led to fewer complaints. 
This video explains the reliability of WRX models between 2015 and 2021: 1mDiscerning CarsYouTube · Dec 7, 2023
Most reliable model years

• 2017–2021: These model years showed significant improvements and are less prone to the chronic problems of earlier generations, making them a popular choice for reliability. 
• 2022 and later: The newest generation of the WRX (2022 onwards) has shown promise in terms of build quality and durability, with early indicators suggesting improved reliability with the updated FA24 engine. 

Less reliable model years 

• 2015 and 2016: These years are often cited as being less reliable and had recalls for issues like a cracked air intake duct. 
• Pre-2007: Some older models, particularly those with the 2.5L engine, had more engine-related issues, though some enthusiasts prefer the driving experience of these earlier models. 

Important considerations for any year

• Maintenance: Proper maintenance is crucial for high-performance cars like the WRX STI, and neglected maintenance can lead to issues in any model year. 
• Modifications: The reliability of the car can be affected by aftermarket modifications. Cars that have been heavily modified, especially for increased power, are more likely to experience problems, particularly with the transmission. 

How much is a 2016 Subaru STI worth?

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