What to Know About the 2013 WRX Motor: Problems, Upgrades, and Repairs

If you're researching the 2013 WRX motor, you're likely either considering buying one, experiencing mechanical issues, or planning performance upgrades. The 2013 Subaru WRX is powered by the EJ255 2.5L turbocharged flat-four engine, known for its balance of power and reliability—when properly maintained. However, this model year has specific weaknesses, particularly related to the cooling system, head gaskets, and oil consumption, which can impact longevity if ignored. Understanding these key factors early helps avoid costly repairs and supports smarter ownership decisions.

Understanding the 2013 WRX Engine: Core Specifications

The 2013 Subaru Impreza WRX is equipped with the EJ255 engine, a 2.5-liter horizontally opposed (boxer) four-cylinder with a turbocharger. It produces 265 horsepower at 5,600 rpm and 244 lb-ft of torque at 2,000–5,200 rpm. This engine uses an IHI VF39 turbocharger, sequential fuel injection, and an intercooler to deliver responsive performance. Unlike the STI's EJ257, the 2013 WRX motor does not feature dual AVCS (Active Valve Control System), limiting high-end efficiency compared to later models.

This generation WRX belongs to the GR chassis series, produced from 2008 to 2014. While it shares visual cues with the standard Impreza, the WRX includes performance-tuned suspension, all-wheel drive, and enhanced cooling components. However, despite its sporty appeal, the 2013 model inherits some longstanding EJ-series vulnerabilities that owners must monitor closely.

Common 2013 WRX Motor Problems and Reliability Concerns

While many 2013 WRX vehicles remain on the road today, several recurring mechanical issues affect long-term reliability. These are not universal but occur frequently enough to warrant attention during purchase or routine maintenance.

1. Head Gasket Failure ⚠️

One of the most serious concerns with the EJ255 engine is premature head gasket failure. Though less widespread than in earlier EJ25 engines (pre-2006), thermal stress and cooling inefficiencies can still lead to warping of cylinder heads or compromised seals. Symptoms include white exhaust smoke, coolant loss without visible leaks, overheating, and milky oil residue under the oil cap.

Contributing factors often include:

• Overheating due to failed radiator fans
• Inadequate coolant maintenance
• Aggressive driving without proper warm-up/cool-down cycles

While Subaru redesigned the head gasket material and improved cooling in later years, the 2013 model remains susceptible under poor maintenance conditions. Replacing head gaskets requires extensive labor and should be done alongside other internal inspections.

2. Cooling System Failures 🔧

A major cause of engine damage in the 2013 WRX is cooling system failure, especially related to the electric radiator fan assembly. Many users report intermittent or complete fan failure, leading to overheating during idle or low-speed driving. This issue appears in search results through queries like “Subaru fan not working” and “radiator cooling fan assembly,” indicating its prevalence across similar models.

The dual-fan setup (radiator and condenser) relies on sensors and relays to activate based on temperature. When the control module fails or motors burn out, the engine cannot dissipate heat effectively. Aftermarket replacements are widely available, but OEM-spec units tend to offer better durability.

🔧 Troubleshooting Tip: If your WRX overheats at stoplights but cools while driving, suspect the cooling fan circuit. Test relay operation and check fuse integrity before replacing the entire motor assembly.

3. Oil Consumption and PCV System Issues 🛠️

Another documented concern is excessive oil consumption, sometimes exceeding one quart per 1,500 miles. This stems from worn piston rings or a clogged Positive Crankcase Ventilation (PCV) system, which increases crankcase pressure and forces oil past valve seals.

Symptoms include blue-tinted exhaust smoke during acceleration, reduced engine performance, and carbon buildup in the intake manifold. Regular inspection and replacement of the PCV valve (typically every 30,000 miles) help prevent vacuum imbalances and oil migration.

4. Turbocharger and Wastegate Failures ⚙️

The IHI VF39 turbocharger used in the 2013 WRX is generally robust, but failures do occur—especially in modified or hard-driven examples. Common signs include boost creep (overboosting due to wastegate sticking), delayed spool-up, or whining noises.

Boost creep often results from a worn actuator rod or degraded spring inside the wastegate. While minor cases may be managed with tuning adjustments, physical repair or replacement is usually necessary. Using quality oil and allowing proper cooldown periods after spirited driving significantly extend turbo life.

Performance Potential and Tuning Options for the 2013 WRX Motor

The stock EJ255 engine offers solid foundation for mild performance upgrades. With bolt-on modifications, owners commonly achieve 300+ wheel horsepower safely, provided supporting systems are upgraded.

Popular Modifications ✅

• Cold Air Intake: Improves airflow efficiency and throttle response. Look for heat-shielded designs to prevent hot air ingestion.
• Downpipe and Exhaust: A cat-back or test-pipe downpipe reduces backpressure and enhances turbo spool. Note: Removing catalytic converters may violate emissions regulations.
• Engine Management Tune: Custom ECU tuning unlocks additional power by adjusting fuel delivery, ignition timing, and boost curves. Always use reputable tuners familiar with EJ engines.
• Intercooler Upgrade: Larger front-mount intercoolers reduce intake air temperatures, improving consistency during repeated acceleration.

⚠️ Caution: Increasing boost beyond factory levels raises cylinder pressures and heat output. Without upgraded internals (pistons, rods, head studs), long-term reliability decreases significantly.

Maintenance Tips to Extend 2013 WRX Motor Life

Proper maintenance is the single biggest factor in preserving the health of the 2013 WRX engine. Follow these guidelines to minimize risk of major failure:

1. Use High-Quality Oil and Change Frequently 🛢️

Subaru recommends 5W-30 synthetic oil changed every 6,000 miles or 6 months. For performance driving or track use, shorten intervals to 3,000 miles. Always use API-certified synthetic oil meeting Subaru’s standards (e.g., ILSAC GF-4 or higher).

2. Flush Coolant Every 30,000 Miles 💧

The factory coolant (Subaru Super Coolant) is designed to last 5 years or 60,000 miles, but many experts recommend flushing it every 30,000 miles in turbocharged models. Old coolant loses corrosion inhibitors, increasing risk of radiator and heater core blockages.

3. Inspect Radiator Fans and Relays Annually 🔍

Given the frequency of fan-related overheating, inspect both radiator and condenser fans annually. Listen for unusual noises, check for debris obstruction, and verify activation when the A/C is turned on or engine reaches operating temperature.

4. Monitor for Early Warning Signs 📋

Stay alert to subtle changes:

• Check engine light with codes P0171/P0172 (lean/rich condition)
• Unusual knocking or ticking sounds
• Drop in fuel economy or power
• Visible smoke from exhaust under load

Addressing small issues early prevents cascading failures.

Buying a Used 2013 WRX: What to Check Before Purchase

Purchasing a used 2013 WRX can offer great value, but thorough inspection is critical. Here’s what to evaluate:

Inspection Area	What to Look For	Red Flags
Service Records	Regular oil changes, coolant flushes, timing belt replacement	No records, inconsistent maintenance
Cooling System	Fan operation, coolant color, absence of leaks	Brown sludge, low coolant, overheating history
Oil Consumption	Owner reports or dipstick check	Using more than 1 qt/3k miles
Turbo Performance	Smooth boost build-up, no hesitation	Whining noise, boost fluctuation
ECU History	Stock vs. tuned, any stored trouble codes	Modified tune without supporting mods

A pre-purchase inspection by a qualified Subaru technician is highly recommended. They can perform a compression test, inspect for head gasket integrity, and scan for hidden fault codes.

Aftermarket Support and Replacement Parts Availability

The 2013 WRX benefits from strong aftermarket support. Whether replacing a failed cooling fan motor or upgrading engine internals, parts are readily available from specialized retailers. When sourcing components:

• Prefer OEM or OEM-equivalent replacements for critical cooling and electrical parts
• Verify compatibility using VIN-specific lookup tools
• Consider upgraded materials (e.g., aluminum fan shrouds) for better heat dissipation

Many online vendors offer direct-fit radiator fan assemblies, such as those listed for Forester and Impreza models sharing the same platform. Ensure the part number matches your vehicle (e.g., 45121AG000 or 45131AL00A) to avoid installation issues.

How the 2013 WRX Motor Compares to Other Years

When evaluating the 2013 model, it helps to compare it against adjacent years:

• 2008–2010 WRX: Earlier models had weaker AVCS systems and slightly lower power output. More prone to head gasket issues due to thinner head bolts.
• 2011–2014 WRX: Mid-cycle updates improved cooling and revised suspension geometry. The 2013 sits in a relatively stable period mechanically.
• 2015+ WRX: Switched to the FA24 engine (in US market), offering better efficiency, more low-end torque, and improved reliability. However, some enthusiasts prefer the character of the older EJ platform.

Thus, the 2013 WRX represents a mature version of the EJ255 engine with fewer inherent flaws than earlier builds—but still requires diligent upkeep.

Frequently Asked Questions (FAQs)

❓ Can I drive my 2013 WRX if the radiator fan isn't working?

No, driving with a non-functional radiator fan risks immediate overheating, especially in traffic. This can lead to head gasket failure or engine warping. Repair the fan before driving.

❓ What causes the 2013 WRX motor to overheat?

Common causes include failed radiator fans, low coolant, thermostat malfunction, or blocked radiator. Electrical faults in the fan relay or wiring are frequent culprits.

❓ Is the 2013 WRX engine reliable with high mileage?

Yes, if well-maintained. Many EJ255 engines exceed 150,000 miles with regular oil changes, coolant flushes, and prompt attention to warning signs.

❓ How much does it cost to replace a 2013 WRX cooling fan assembly?

Replacement costs range from $150–$300 for the part and $100–$200 in labor. OEM units last longer but cost more than generic alternatives.

❓ Are there any recalls on the 2013 WRX engine or cooling system?

As of current records, there are no active safety recalls specifically for the 2013 WRX engine or cooling fan system. Always verify using your VIN at NHTSA.gov.