Subaru WRX from 2015 to 2021 Service & Repair Manual

Ask a question about your WRX. Get the right spec, torque, fluid, or step in seconds.

Haynes DIY is a subscription answer tool for vehicle maintenance and repair, covering the 2015–2021 Subaru WRX. It confirms your exact trim and transmission before you start, so every spec matches your specific vehicle. Ask what torque your lug nuts need, which gear oil your manual transmission takes, or how to replace the front brake pads, and get a direct answer. No scrolling through search results, forums, or videos that may not apply to your car.

No more manual or CVT guesswork. No more conflicting threads. Just a fast way to get the information you need for your specific WRX.

Models covered

Full-vehicle coverage across 1,000+ operations

Haynes DIY covers the 2015–2021 WRX front to back, with over 1,000 maintenance and repair operations across every major system.

• Find the specifications you need, including torque values, fluid types and capacities, service intervals, and fastener sequences.
• Routine maintenance is covered end to end, from oil and filter changes to spark plugs, air and cabin filters, brake service, and tire rotations.
• Repair procedures span the engine, transmission, suspension, steering, brakes, electrical, HVAC, exhaust, and body.
• For tightening work, Haynes DIY points you to the manufacturer procedure so torque values, stages, and order are followed exactly, which helps you avoid skipped steps or damaged components.
• After a job, ask what to check and Haynes DIY surfaces the relevant inspection steps so you can confirm everything is right before the WRX goes back on the road.

Every answer comes with one-click follow-ups for estimated time, tools, parts, consumables, and torque, so you can pull in exactly what the job demands without starting a new search.

Built for your exact WRX

The 2015–2021 WRX range spans the 6-speed manual and the Sport Lineartronic CVT across several trims, and those differences change the answer. Haynes DIY confirms your trim and transmission at the start of every conversation, so what you get matches your vehicle rather than a best guess.

Common questions for the 2015–2021 Subaru WRX

What oil does a Subaru WRX take, and what is the capacity?

The turbocharged 2.0L calls for a specific oil grade, and the capacity depends on whether you are doing an oil-and-filter change. Haynes DIY confirms your exact WRX and gives you the manufacturer capacity along with the correct grade.

What transmission fluid does a Subaru WRX take, manual or CVT?

It depends on whether your WRX has the 6-speed manual or the CVT, and the amount differs between a drain-and-fill and a full exchange. Ask Haynes DIY and it returns the manufacturer fluid type and capacity for your transmission.

What is the lug nut torque on a Subaru WRX?

Haynes DIY gives you the manufacturer torque value for your specific trim and wheel package.

What fluid does the Subaru WRX rear differential take?

The WRX uses a specific gear oil in the rear differential, and front differential service can vary by transmission. Haynes DIY confirms your configuration and gives you the manufacturer fluid type, capacity, and procedure.

What's covered, and what isn't

Haynes DIY answers maintenance and repair questions for your 2015–2021 Subaru WRX. It is not a diagnostic tool. It tells you how to do the job, not what is wrong with the car. It does not read fault codes, diagnose symptoms, or cover modifications and aftermarket parts. For work outside the listed years, check the matching Haynes DIY product for your vehicle.

Your access

Your subscription covers the 2015–2021 Subaru WRX across its major systems, with access to the full set of covered operations for the length of your subscription.

Why Haynes

Haynes brings decades of workshop manual expertise to a faster format. Instead of a single printed manual, you get a tool that covers your whole vehicle and answers in manufacturer-grounded detail for your specific year, trim, and transmission.

Haynes DIY. Start asking.