Description

2010 Subaru IMPREZA Service Manual – OEM Factory Repair Guide

If you’re working on a 2010 Subaru IMPREZA and you’re using a Chilton or Haynes, you’re wasting time. I’ve been turning wrenches for 28 years, and I’ve seen too many guys strip a head bolt because they trusted an aftermarket torque spec. The Subaru IMPREZA 2010 Service Manual is the only reference you should have on your bench. It’s 3666 pages of factory documentation, straight from Fuji Heavy Industries. No translations, no guesswork, no third-party rewrites.

SPECIFICATIONS: Standard Data for the 2010 IMPREZA

This section (SPC) gives you the actual numbers. Dimensions, engine specs, electrical system values, transmission gear ratios, steering angles, suspension geometry, brake rotor thickness, tire pressures, fluid capacities, and vehicle weights. Page 1 of the manual shows the Quick Reference Index, so you can jump straight to the data you need. Need the capacity for the manual transmission? It’s in the CAPACITY subsection. I’ve seen guys put the wrong fluid in because they looked up a generic spec. This manual ends that.

PRECAUTION: Why This Section Saves Your Shop

The PRECAUTION (PC) section is not a suggestion. It covers ABS, VDC, brake fluid, radiator fan, road test, airbag disposal, airbag module, special tools, window adhesive, oil, fuel, coolant, and A/C refrigerant. If you’re working on an airbag system, you follow the disposal procedure exactly. The manual tells you how to remove and install hoses to avoid contamination. I’ve had apprentices skip this section and cause a leak. That’s billable hours down the drain. Read it.

That section alone is worth the price.

HOW TO USE THIS MANUALS: Structure and Definitions

This manual defines “NOTE”, “CAUTION”, and “WARNING” on page 2. If you ignore a WARNING, you’re risking injury or component damage. The manual also explains the structure of the sections, how to find component locations, and the inspection methods. It uses SI units with imperial equivalents. Don’t skip the definitions. They’re there for a reason.

3666 Pages of Factory Documentation

This is not a condensed manual. 3666 pages cover every system on the 2010 IMPREZA. The table of contents includes GENERAL INFORMATION, FOREWORD, HOW TO USE THIS MANUALS, SPECIFICATIONS, PRECAUTION, NOTE, IDENTIFICATION, RECOMMENDED MATERIALS, PRE-DELIVERY INSPECTION, and PERIODIC MAINTENANCE SERVICES. Each section is broken down into subsections with clear headings. You can find the exact procedure for removing the front hood damper stay or the tie-down hook installation. The depth is what you’d expect from an OEM factory service manual.

Source Validity: OEM vs Aftermarket

The manual you’re looking at is the original factory document from Subaru. Aftermarket manuals often omit critical steps or use generic torque values. For example, the SPECIFICATIONS section lists the exact compression ratio, valve timing, and firing order. I’ve seen aftermarket manuals that round off torque values to the nearest 5 ft-lb. That’s unacceptable for a head gasket job. The OEM manual gives you the precise number. If you want to do the job right, use the OEM data. For more on the automotive industry standards, see Automotive Industry Overview.

Does This Manual Cover the Fuel System?

Yes. The RECOMMENDED MATERIALS section specifies unleaded gasoline, lubricants, fluids, coolants, refrigerants, greases, adhesives, and seal materials. The PRECAUTION section covers fuel handling. The engine section (not shown in this excerpt) includes fuel injection diagnostics. The manual is comprehensive in the sense that it covers everything Subaru designed for the vehicle.

If you’re looking for related manuals, check out SUBARU IMPREZA 1993 Service Manual – Section: Electrical Section for older models, or Subaru Impreza Service Manual for a broader range. For the 1994 model, see SUBARU Impreza 1994 Service Manual – Section: Engine Sction.

Also, the automotive industry has standards for repair documentation. Automotive Industry Overview provides context.

FAQ

Does this manual cover the 2.5L engine?

Yes, all engine variants for the 2010 IMPREZA are covered.

Are torque specifications included?

Every bolt torque is listed in the SPECIFICATIONS section. You’ll find cylinder head bolts, main bearing cap bolts, and more. The manual uses factory SI units with imperial conversions.

Can I use this manual if I’m a beginner?

The manual is written for experienced mechanics. It assumes you know how to use a torque wrench and understand basic diagnostics. If you’re a beginner, I’d recommend pairing it with a subscription to a technical training course. But the manual itself is the real deal. It has the same information a Subaru dealer technician uses. You’ll need to learn the basics elsewhere, but once you do, this manual is indispensable.

Is this a reprinted copy?

This is a digital OEM factory file, not a reprint.

If you’re serious about working on a 2010 IMPREZA, stop relying on aftermarket shortcuts. Get the factory documentation that the pros use. Access the Factory Manual and put it on your tablet or print out the sections you need. Your torque wrench will thank you.