Subaru 2.4L FA24 BOXER (turbo and BRZ naturally aspirated): years, specs & known problems
By CarWhere Research · Updated
The FA24 is Subaru's 2,387 cc, 2.4-liter direct-injection turbo BOXER four. Subaru rates it at 260 hp and 277 lb-ft in the Ascent (2019–present), Outback XT (2020–present) and Legacy XT (2020–2025), and 271 hp and 258 lb-ft in the 2022-on WRX. The 2022-on BRZ uses a 228-hp naturally aspirated 2.4L.
The FA24 turbo debuted in the 2019 Ascent. Subaru Corporation lists it as a DOHC direct-injection turbo, 2,387 cc from a 94 × 86 mm bore and stroke, and Subaru gives a 10.6:1 compression ratio, a twin-scroll turbo, an intercooler and dual AVCS. In the Ascent, Outback and Legacy it is paired with a high-torque Lineartronic CVT and runs on 87 octane. The WRX tune makes 271 hp, with a 6-speed manual or the Subaru Performance Transmission.
The second-generation BRZ uses a naturally aspirated 2.4L with the same 94 × 86 mm bore and stroke, 12.5:1 compression and Toyota D-4S direct plus port injection, rated 228 hp and 184 lb-ft. Subaru's BRZ releases don't print an engine code. No Subaru hybrid uses the 2.4L; the hybrids use a 2.5L. Recall 19V856 (PCV valve) covered 2019 Ascents.
2.4L FA24 BOXER (turbo and BRZ naturally aspirated) at a glance
| Engine | Model years | Fuel | Peak hp | Peak torque (lb-ft) | Documented problems | Recalls |
|---|---|---|---|---|---|---|
| FA24 turbo: Ascent, Outback XT, Legacy XT (2019–present) | 2019–present | Gasoline (87 AKI) | 260 | 277 | 0 | 1 |
| FA24 turbo: WRX (2022–present) | 2022–present | Gasoline | 271 | 258 | 0 | 0 |
| 2.4L naturally aspirated: BRZ (2022–present) | 2022–present | Gasoline (premium) | 228 | 184 | 0 | 0 |
CarWhere lists 0 documented problems and 1 NHTSA recall for the 2.4L FA24 BOXER (turbo and BRZ naturally aspirated), each with a source. Part of the Subaru BOXER engines (EJ25, FB25, FA20, FA24) family.
FA24 turbo: Ascent, Outback XT, Legacy XT (2019–present)
260 hp and 277 lb-ft from 2,000–4,800 rpm, always with a high-torque Lineartronic CVT.
FA24 turbo: Ascent, Outback XT, Legacy XT (2019–present) specifications
| Specification | Value |
|---|---|
| Engine code | FA24[6] |
| Displacement | 2,387 cc[6] |
| Bore × stroke | 94 × 86 mm[6] |
| Compression ratio | 10.6:1[1] |
| Induction | Twin-scroll turbocharger with intercooler[1] |
| Fuel injection | Direct injection[6] |
| Valve timing | Dual AVCS[1] |
| Fuel | 87 AKI regular[6] |
| Transmission | High-torque Lineartronic CVT, 8-speed manual mode[1] |
| EPA listing, 2027 Ascent | 2.4 L turbo four, CVT (AV-S8)[7] |
| Outback Wilderness | Standard 2.4L turbo from the 2022 model[8] |
| Legacy XT | Legacy production ended with the 2025 model year[9] |
| EPA listing, 2025 Legacy | 2.4 L turbo four, CVT (AV-S8)[10] |
FA24 turbo: Ascent, Outback XT, Legacy XT (2019–present) horsepower and torque by year
| Model years | Application | Horsepower (hp) | Torque (lb-ft) | Source |
|---|---|---|---|---|
| 2019 | Ascent260 hp at 5,600 rpm; 277 lb-ft from 2,000–4,800 rpm | 260 | 277 | [1] |
| 2020 | Outback XT | 260 | 277 | [2] |
| 2020 | Legacy XT | 260 | 277 | [3] |
| 2026 | Outback XT and Wilderness | 260 | 277 | [4] |
| 2027 | Ascent | 260 | 277 | [5] |
"—" means we could not confirm the figure from a primary source.
Which vehicles have the FA24 turbo: Ascent, Outback XT, Legacy XT (2019–present)?
| Model | Model years | Notes |
|---|---|---|
| Ascent | 2019–present | |
| Outback XT / Wilderness | 2020–present | Wilderness from 2022 |
| Legacy XT | 2020–2025 | Legacy production ended in 2025 |
FA24 turbo: Ascent, Outback XT, Legacy XT (2019–present) recalls
| NHTSA campaign | Reported | Vehicles | Summary |
|---|---|---|---|
| 19V856 | 2019-12-02 | 2019 Crosstrek, Forester and Ascent51,613 vehicles | The aluminum PCV valve can separate and its pieces can enter the engine, causing a loss of power. Dealers replace the valve, and replace the short block if the pieces cannot be found, free of charge. |
FA24 turbo: WRX (2022–present)
The WRX tune makes 271 hp at 5,600 rpm and 258 lb-ft from 2,000–5,200 rpm, with a 6-speed manual or the Subaru Performance Transmission.
FA24 turbo: WRX (2022–present) specifications
| Specification | Value |
|---|---|
| Displacement | 2.4 L, direct-injection turbo[11] |
| Transmissions | 6-speed manual or Subaru Performance Transmission (CVT, 8-speed manual mode)[11] |
| EPA listing, 2022 WRX | 2.4 L turbo four, six-speed manual[13] |
FA24 turbo: WRX (2022–present) horsepower and torque by year
| Model years | Application | Horsepower (hp) | Torque (lb-ft) | Source |
|---|---|---|---|---|
| 2022 | WRX | 271 | 258 | [11] |
| 2026 | WRX | 271 | — | [12] |
"—" means we could not confirm the figure from a primary source.
Which vehicles have the FA24 turbo: WRX (2022–present)?
| Model | Model years | Notes |
|---|---|---|
| WRX | 2022–present | Includes the 2025 WRX tS |
2.4L naturally aspirated: BRZ (2022–present)
The second-generation BRZ's 2.4L shares the turbo engine's bore and stroke but runs 12.5:1 compression and direct plus port injection, for 228 hp and 184 lb-ft.
2.4L naturally aspirated: BRZ (2022–present) specifications
| Specification | Value |
|---|---|
| Displacement | 2.4 L[14] |
| Bore × stroke | 94 × 86 mm (3.70 × 3.39 in)[14] |
| Compression ratio | 12.5:1[14] |
| Fuel injection | Toyota D-4S direct plus port injection[14] |
| Valvetrain | DOHC, chain driven, 4 valves per cylinder, dual AVCS[14] |
| EPA listing, 2027 BRZ | 2.4 L four, direct plus port injection[16] |
2.4L naturally aspirated: BRZ (2022–present) horsepower and torque by year
| Model years | Application | Horsepower (hp) | Torque (lb-ft) | Source |
|---|---|---|---|---|
| 2022 | BRZ228 hp at 7,000 rpm; 184 lb-ft at 3,700 rpm | 228 | 184 | [14] |
| 2027 | BRZ | 228 | — | [15] |
"—" means we could not confirm the figure from a primary source.
Which vehicles have the 2.4L naturally aspirated: BRZ (2022–present)?
| Model | Model years | Notes |
|---|---|---|
| BRZ | 2022–present |
2.4L FA24 BOXER (turbo and BRZ naturally aspirated) issues by model
The same engine shows up on these known-issues pages, with model-specific details.
Related Subaru research
Confirm a car really has the 2.4L FA24 BOXER (turbo and BRZ naturally aspirated).
The engine a Subaru left the factory with is part of its build record. The CarWhere Subaru build sheet reconstructs factory colors, options and packages from licensed VIN-level build data — availability is checked free, and it is $9.99 only when detailed build data is found for that VIN.
Frequently asked questions
Which Subarus have the 2.4 turbo?
The Ascent (2019–present), Outback XT and Wilderness (2020–present), Legacy XT (2020–2025) and WRX (2022–present). The Ascent, Outback and Legacy are rated 260 hp and 277 lb-ft; the WRX 271 hp and 258 lb-ft.
Does the FA24 need premium fuel?
Subaru lists 87 AKI regular fuel for the Ascent and the 2020 Outback XT.
Is the BRZ engine an FA24?
The 2022-on BRZ uses a naturally aspirated 2.4L with the same 94 × 86 mm bore and stroke as the FA24 turbo, but with 12.5:1 compression and direct plus port injection. Subaru's BRZ releases call it a 2.4-liter BOXER without printing a code.
What was the FA24 recall?
Recall 19V856 covered certain 2019 Ascents (with 2019 Crosstreks and Foresters) whose aluminum PCV valve could separate and send pieces into the engine. Dealers replace the valve, or the short block if the pieces cannot be found.
Is the FA24 used in Subaru hybrids?
No. The Forester Hybrid and Crosstrek Hybrid use a newly developed 2.5-liter BOXER engine with electric motors.
Sources
Ratings are Subaru-published figures as cited; descriptions are CarWhere’s own summaries of the sources below. Repair costs appear only where a source states them and vary by shop and region.
- Subaru of America, Inc. Presents All-New 2019 Ascent 3-Row SUV — Subaru of America, Inc. (media.subaru.com)
- Subaru Debuts All-New Sixth-Generation 2020 Outback (Apr. 17, 2019) — Subaru of America, Inc. (media.subaru.com)
- Subaru Storms Into Windy City with All-New Seventh-Generation 2020 Legacy (Feb. 7, 2019) — Subaru of America, Inc. (media.subaru.com)
- Subaru Debuts All-New 2026 Outback with Bold New Styling, Upgraded Technology (Apr. 16, 2025) — Subaru of America, Inc. (media.subaru.com)
- Subaru Announces Pricing on 2027 Ascent 3-Row SUV (June 11, 2026) — Subaru of America, Inc. (media.subaru.com)
- Subaru Debuts All-New Ascent 3-Row SUV (specifications, Nov. 29, 2017) — Subaru Corporation (subaru.co.jp)
- EPA fuel economy: 2027 Subaru Ascent (2.4L turbo) — U.S. EPA / DOE (fueleconomy.gov)
- Subaru Debuts New 2022 Outback Wilderness (Mar. 30, 2021) — Subaru of America, Inc. (media.subaru.com)
- Subaru Announces Legacy Production Will End in 2025 (Apr. 23, 2024) — Subaru of America, Inc. (media.subaru.com)
- EPA fuel economy: 2025 Subaru Legacy AWD (2.4L turbo) — U.S. EPA / DOE (fueleconomy.gov)
- Subaru Debuts the All-New 2022 WRX (Sept. 10, 2021) — Subaru of America, Inc. (media.subaru.com)
- 2026 Subaru WRX Brings Back the Affordable Rally-Inspired Sports Sedan Starting at $32,495 MSRP (Jan. 20, 2026) — Subaru of America, Inc. (media.subaru.com)
- EPA fuel economy: 2022 Subaru WRX (2.4L turbo, 6-speed manual) — U.S. EPA / DOE (fueleconomy.gov)
- All-New 2022 Subaru BRZ Makes Global Debut (Nov. 18, 2020) — Subaru of America, Inc. (media.subaru.com)
- Subaru of America Announces Pricing on 2027 Subaru BRZ (June 4, 2026) — Subaru of America, Inc. (media.subaru.com)
- EPA fuel economy: 2027 Subaru BRZ (2.4L, 6-speed manual) — U.S. EPA / DOE (fueleconomy.gov)
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Independent reference compiled by CarWhere — not affiliated with or endorsed by Subaru of America, Inc. or Subaru Corporation. Subaru and the model names are trademarks of their owners.