2.5L DOHC 16-Valve 4-Cylinder Engine for 2022-2025 Subaru Forester
Product Notes Read before buying
This is a 2.5L gasoline engine. It fits vehicles where the 6th digit of the VIN is 'A' or 'E'. For the 2025 model year, this engine is specified for the Wilderness trim. Please verify your vehicle's specifications before ordering.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Wilderness | SUV | 2022 - 2025 | H4 2.5L | AWD | Automatic CVT | Hollander: FORESTER 22-24 (2.5L), VIN A (6th digit) | FORESTER 22-24 (2.5L), VIN E (6th digit) | FORESTER 25 (2.5L), gasoline, VIN A (6th digit, Wilderness, US market) | FORESTER 25 (2.5L), gasoline, VIN E (6th digit, Wilderness, Canada market); engine_size: include 2.5L; fuel_type: include GAS; engine_config: include H4; vin_digit: include A; vin_digit: include E; application_notes: include For 2025 models, fits Wilderness trim (US/Canada market) [inferred] |
| 2024 |
Know This Engine Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this engine family:
A quick look at your own vehicle makes sure the right engine shows up:
- Confirm the 6th digit of your 17-digit VIN is 'A' or 'E'.
- Verify the failed engine block is stamped with 'FB25'.
- Confirm your vehicle is equipped with an automatic CVT transmission and All-Wheel Drive (AWD).
- Verify emissions/market spec (US Wilderness is VIN digit A, Canadian Wilderness is VIN digit E).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine hoist/crane and load leveler
- Flywheel/flexplate holder tool (e.g., Company23 or CTA Tools 7630 / 5305)
- Fuel line disconnect tool (e.g., AST AH8028)
- T70 Torx bit
- Pin FA/FB Crank/Cam holding tool
- E-TORX socket set
- 32mm axle nut socket
Budget for these consumables at install:
- Engine Oil (SAE 0W-20 Full Synthetic, approx. 4.4 to 4.8 liters / 4.4 to 5.1 quarts)
- Engine Oil Filter
- Engine Coolant (Subaru Super Coolant, blue, pre-diluted)
- Spark Plugs (NGK Laser Iridium)
- Intake manifold gaskets (one-time use)
- Exhaust manifold gaskets
- High-pressure fuel delivery pipe seals/O-rings
- EGR cooler gasket (one-time use)
- Front and rear crankshaft main seals
- High-temperature RTV Silicone (e.g., ThreeBond 1217H or equivalent)
- Torque-to-Yield (TTY) cylinder head bolts
What your vehicle’s computers will need after the swap:
What’s involved: Immobilizer synchronization / ECU cloning / VVT learned values reset
sources differ: Arm 1 states no programming is required if keeping the original ECU, but recommends a scan tool to reset VVT learned values. Arm 2 states programming is required to address the immobilizer system if swapping the ECU, recommending ECU cloning or dealer programming (SSM4). Cautious value 'model_dependent' selected.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- One-Time Use Fuel & Gasket Components: High-pressure fuel delivery pipe, intake manifold gaskets, and EGR cooler gaskets are strictly one-time use parts.
- Thermo Control Valve (TCV) Alignment: Fuel line runs very close to the TCV and can impede its removal. Do not bend or force the high-pressure fuel lines.
- Boxer Engine Tight Clearances: Spark plugs and valve covers are extremely close to the frame rails. Replace them while the engine is out on a stand.
- Torque Converter Seating: For automatic (CVT) models, ensure the torque converter is fully seated in the transmission pump before tightening bellhousing bolts to avoid destroying the pump.
- VVT Learned Values: Perform a VVT learned value reset using a compatible scan tool to prevent rough idling or VVT codes.
- Liquid Sealant (RTV) Application: Cam carriers and upper oil pan do not use traditional gaskets. Proper surface preparation and application of ThreeBond are critical.
- Torque-to-Yield (TTY) Bolts: Cylinder head bolts must be replaced, not reused, and tightened in a specific sequence and angle.
- Cam Carrier Removal/Installation: Must be unbolted and re-torqued in the correct sequence to avoid damage.
- Setting Camshafts to 'Zero Lift': Rotate camshafts to a neutral position before removing cam gears to release valve spring tension.
- Coolant Crossover Pipe: Ensure a perfect seal on the coolant crossover pipe during installation to avoid hard-to-access leaks.
Easy to get right once you know them:
- Reusing One-Time Use Gaskets: Reusing intake manifold or EGR gaskets results in vacuum leaks, rough idle, and lean codes.
- Not Transferring the Wiring Harness: Assuming the donor harness is plug-and-play. Always transfer your original wiring harness, sensors, and brackets.
- Using the Wrong Oil Viscosity: Using heavier oil (like 5W-30) instead of SAE 0W-20 restricts flow to the Dual AVCS cam phasers, causing timing codes.
- Damaging the High-Pressure Fuel Pump (HPFP): Banging the mechanical HPFP against the firewall during installation, cracking the housing or connector.
- Ignoring Immobilizer Programming: Assuming the engine is plug-and-play without cloning the ECU or having the dealer program the immobilizer system.
Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Inspect and replace with updated redesigned TCV (part number 21319AA040 or newer) featuring stainless steel shaft and improved waterproofing.
🔎 Recommended at install: Ensure engine water pipe attachment bolts are tightened properly to prevent coolant leaks.
🔎 Recommended at install: Inspect and replace front driveshafts if necessary to prevent loss of drive power or rollaway.
🔎 Recommended at install: Perform chemical intake cleaning or walnut blasting every 60,000 to 100,000 miles.
🔎 Recommended at install: Replace spark plug tube seals if oil is seeping into the spark plug wells.
🔎 Recommended at install: Reseal cam carriers using high-quality liquid sealant (RTV) like ThreeBond.
Researched from factory recalls, TSBs and OEM service data (reference unit 300-10646-5012783). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
Related Trouble Codes (OBD-II)
3 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Subaru: 10100CF160, 10100CG110, 10100CG120, FB25DXZHLF, FB25DXZHNA
Fits Years: 2022 2023 2024 2025
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Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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