Automotive Engine Guides

Subaru WRX Engine Guide: EJ205, EJ255, EJ257, FA20, and FA24

Identify the engine in a Subaru WRX or STI, compare the EJ205, EJ255, EJ257, FA20DIT, and FA24DIT, and find the right reliability, maintenance, and diagnostic guide.

Subaru EJ205 Engine Guide: Specs, Reliability, and USDM vs. JDM Differences

Learn where Subaru used the EJ205, how USDM and JDM versions differ, what to inspect on an older engine, and what matters when buying a replacement.

Subaru EJ25 Engine: Specs, Reliability, & Biggest Problems

Looking to buy an EJ25 powered Subaru, or just keep yours running in top shape? We've got everything you need to know.

Subaru FA20 Engine Specs, Variants & Information

Learn about the Subaru FA20 engine's specifications, naturally aspirated and turbocharged variants, applications, and key differences across Subaru, Toyota, and Scion models.

Subaru FA24 Engine Guide: FA24F vs. FA24D, Specs, and Reliability

Compare Subaru FA24F and FA24D engines, including specifications, vehicle applications, fuel systems, turbocharging, reliability, and replacement-engine compatibility.

Subaru WRX Common Problems by Generation and Year

Learn the common Subaru WRX and STI problems by chassis, engine, and model year, including what symptoms mean and what to inspect before buying.

FA20DIT Common Problems and Reliability: 2015-2021 Subaru WRX

A practical FA20DIT reliability guide for the 2015-2021 VA Subaru WRX, including carbon buildup, knock, boost leaks, oil consumption, tuning risks, and inspection advice.

FA24DIT Common Problems and Reliability: 2022+ Subaru WRX

A practical FA24DIT reliability guide for the 2022+ VB Subaru WRX, covering oil use, carbon deposits, heat, clutch and transmission concerns, tuning risks, and what is actually known.

2022+ WRX FA24 RTV Oil Pickup Problem: What Owners Should Know

Learn what is known about RTV sealant debris and the FA24 oil pickup in the 2022+ Subaru WRX, what symptoms matter, how the system is inspected, and whether buyers should be concerned.

EJ255 / EJ257 Ringland Failure Symptoms and Causes

Learn what EJ255 and EJ257 ringland failure feels like, what usually breaks the piston, how to test for damage, and what to do before a small crack becomes engine damage.

EJ257 Rod Bearing Failure Symptoms: STI Rod Knock Diagnosis

Learn the warning signs of EJ257 rod-bearing failure, how rod knock differs from normal Subaru noises, what tests can confirm the problem, and when to stop driving.

Subaru WRX Misfire Codes: P0300, P0301, P0302, P0303, and P0304

Diagnose Subaru WRX misfire codes P0300, P0301, P0302, P0303, and P0304 by engine generation, symptom pattern, and modification history before replacing parts.

Subaru WRX Boost Leak Symptoms and Diagnosis Guide

Learn how to recognize Subaru WRX boost leak symptoms, find common FA20DIT and FA24DIT leak points, and pressure- or smoke-test the system before blaming the tune.

Subaru WRX Walnut Blasting: FA20DIT Intake Valve Cleaning Guide

Learn when a 2015-2021 Subaru WRX needs walnut blasting, what carbon buildup does to FA20DIT intake valves, how the service works, what it costs, and whether DIY cleaning is worth the risk.

Subaru WRX Reliability by Year: Common Problems and What to Check

How reliable is the Subaru WRX? Compare EJ, FA20, and FA24 generations, common problems, modified-car risks, maintenance priorities, and the checks that matter before buying.

Subaru WRX Transmission Fluid: Type, Capacity, and Change Interval

Find the correct Subaru WRX transmission fluid, gear-oil capacity, and service interval for VA, VB, EJ, manual, CVT, and SPT cars.

VA WRX Clutch Problems and Replacement Cost: 2015-2021 Guide

Learn how to diagnose clutch slip, chatter, throwout-bearing noise, pedal problems, and transmission symptoms on a 2015-2021 Subaru WRX, plus realistic replacement-cost planning.

Nissan VQ35DE Engine Specs & Problems You Need To Know

If you're looking to keep your 350Z or G35's engine in top shape, or thinking of buying a car with with a VQ35DE, then we've got everything you should know.

Nissan VQ37VHR Engine Specs & Common Problems You Should Know

Looking to keep your 370Z, G37, or other VQ37VHR equipped car running like new? Want to buy a car with this legendary engine? Here's what you need to know.

BMW B58 Engine Guide: Specs & Problems You Need to Know

The BMW B58 powers a wide range of BMW cars, as well as the Toyota Supra. We've got everything you need to know about this legendary engine here.

WRX Bypass Valve vs. Blow-Off Valve: Which Should You Run?