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Subaru FA24 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The Subaru FA24 is a 2.4-litre turbocharged boxer engine that serves as Subaru's modern performance flagship, powering the VB WRX, Ascent, Outback XT and Legacy XT. Reconditioned units from £3,500 - Subaru's most capable turbocharged engine yet.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£2,500
Reconditioned from
£3,500
Rebuilt from
£5,000
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Subaru FA24 - Specifications at a Glance
Engine Code
FA24 (FA24F / FA24DIT turbocharged; FA24D naturally aspirated)
Fuel
Petrol
Configuration
2.4L turbocharged flat-four (Boxer), DOHC 16-valve, semi-closed deck
Power Output(s)
260-271 hp (194-202 kW) at 5,600 rpm
Torque
350-376 Nm (258-277 lb-ft) at 2,000-4,800 rpm
Years Produced
2018-present
UK Models Fitted
3 models - full list in Compatibility below
2025 UK Replacement Requests
[Not in proprietary data - see compatibility demand]
Replaced
EJ25 (2.5L turbo) / FA20 (2.0L turbo)
Replaced By
- (current engine)
Most Common Failure
Oil starvation / RTV sealant issues / carbon buildup
Reconditioned Price Range
£3,500-£5,000 supply-only
Vetted UK specialists for FA24 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Subaru Models Use the FA24-
The FA24 is Subaru's modern performance engine, debuting in the 2018 Ascent and progressively replacing the EJ25 and FA20 across the range. It is offered in two distinct configurations: the turbocharged FA24F (also called FA24DIT) for SUV and performance applications, and the naturally aspirated FA24D for the BRZ sports coupe. The FA24 represents a significant evolution in Subaru's turbocharged boxer lineup, building on lessons learned from the FA20 DIT while addressing some of its predecessor's shortcomings.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Subaru Ascent | WM (first generation) | - | 2018-present | |
| Subaru Legacy | BN/BS (sixth generation) | 2.4 Turbo, XT | 2019-present | |
| Subaru Outback | BS (fifth generation) | XT | 2019-present | |
| Subaru WRX | VB (second generation) | WRX | 2022-present | |
| Subaru Levorg | VN (second generation) | 2.4 Turbo | 2020-present | |
| Subaru BRZ | ZD (second generation) | BRZ | 2022-present |
02
Subaru Legacy
03
Subaru Outback
04
Subaru WRX
05
Subaru Levorg
06
Subaru BRZ
CROSS-BRAND
FA24 is documented across 6 BMW applications spanning Subaru Ascent, Subaru Legacy, Subaru Outback, Subaru WRX, Subaru Levorg, Subaru BRZ. Registration lookup confirms the exact suffix before quotes are sent.
Not sure which engine your car has?
Not sure which engine your car has- Enter your registration above - we'll confirm your exact FA24 fitment before any quotes are sent.
Prices
Subaru FA24 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £2,500-£3,800 | £3,400-£4,800 | 3-6 months |
Reconditioned | £3,500-£5,000 | £4,500-£6,200 | 12-24 months |
Rebuilt | £5,000-£7,000 | £6,200-£8,200 | 12-24 months |
All . Fitted = supply price + labour band below.
Labour Guide
Fitting an FA24 typically takes 10-14 hours at £65-£85/hr (independent Subaru specialist) - confirm exact labour when comparing quotes. A quality engine rebuild can consume 20+ hours of workshop time.
Price Factors
What genuinely moves the price for THIS engine: whether the engine is the turbocharged FA24F (WRX, Ascent, Outback XT) or the naturally aspirated FA24D (BRZ/GR86) - these are NOT interchangeable. The condition of the turbocharger, oil system upgrades (baffled pan, improved pickup), and whether the engine has had the RTV sealant issue addressed all affect the final price. See our full reconditioned engine cost guide.
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Common Problems
Subaru FA24 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the FA24, based on real-world data and verified failure patterns.
Verified issue focus: Oil starvation / RTV sealant issues / carbon buildup.
The FA24 improves on the FA20 in several key areas: more torque, improved rod strength, and better thermal efficiency. The semi-closed deck block provides better cylinder wall support than the EJ's open deck design. However, the engine is still relatively new and long-term reliability data is limited. The oil starvation issue is the most significant concern for performance-oriented owners.
Compare rebuilt FA24 prices with the failures already addressed
Engine Variants
FA24 Variants - Which One Is in Your Car-
INTRO: The FA24 family includes both turbocharged and naturally aspirated variants. The turbocharged FA24F (also called FA24DIT) is found in the WRX, Ascent, Outback XT and Legacy XT. The naturally aspirated FA24D is found in the BRZ and GR86. These are NOT interchangeable. ### FA24F / FA24DIT - 2018-present (turbocharged, Ascent/Outback XT/Legacy XT) - Fitted to: Subaru Ascent WM (2018-present), Subaru Outback BS XT (2019-present), Subaru Legacy BN/BS XT (2019-present), Subaru Levorg VN (2020-present) - Key technical difference: Turbocharged, DOHC, 16-valve. Direct injection only. Semi-closed deck aluminium block. Bore and stroke: 94.0 mm × 86.0 mm. Compression ratio: 10.6:1. Twin-scroll turbocharger with intercooler. Power: 260-271 hp (194-202 kW) at 5,600 rpm. Torque: 350-376 Nm at 2,000-4,800 rpm. Dual AVCS (variable intake and exhaust valve timing). Timing chain driven. Recommended oil: 5W-30. Oil capacity: 5.2 litres. Weight: 190 kg. Max boost: 1.0-1.2 bar (14.5-17.4 psi). Redline: 6,800 rpm. - Sub-code-specific failure note: Oil starvation on track is less documented than the BRZ but still a concern. Carbon buildup on intake valves is a long-term issue. Heat sensitivity is significant. Floating idle speeds have been reported on some units. - Interchange note: Not interchangeable with FA24D - the turbo variant has different internals, lower compression, different ECU, and different ancillaries. Ensure your replacement matches your model year and application. ### FA24F - 2022-present (turbocharged, WRX VB) - Fitted to: Subaru WRX VB (2022-present) - Key technical difference: Turbocharged, DOHC, 16-valve. Direct injection. Semi-closed deck. Bore and stroke: 94.0 mm × 86.0 mm. Compression ratio: 10.6:1. Power: 265-271 hp depending on tune. Twin-scroll turbocharger. Revised ECU calibration and some mechanical changes to internal components. Features a stronger rotating assembly with beefier connecting rods and crankshaft compared to the FA20 DIT. - Sub-code-specific failure note: Oil starvation on track is a concern. Heat sensitivity is significant for modified cars. Plastic timing chain guides - long-term durability unknown. - Interchange note: Not interchangeable with Ascent/Outback XT FA24F - ECU tuning and some ancillaries differ. Only replace with a WRX-spec engine. ### FA24D - 2022-present (naturally aspirated, BRZ/GR86) - Fitted to: Subaru BRZ ZD (2022-present), Toyota GR86 ZN8 (2022-present) - Key technical difference: Naturally aspirated, DOHC, 16-valve. Toyota D-4S fuel system combining direct and port injection. Bore and stroke: 94.0 mm × 86.0 mm. Compression ratio: 12.5:1. Power: 235 ps (173 kW) / 170 kW (228 hp). Torque: 249 Nm. Redline: 7,000+ rpm. Dual AVCS. Timing chain driven. Recommended oil: 0W-20. - Sub-code-specific failure note: Oil starvation in right-hand corners is the most significant concern. RTV sealant issues also affect this variant. - Interchange note: Not interchangeable with FA24F - compression ratio, fuel system, ECU, and ancillaries differ. Only replace with a BRZ/GR86-spec engine.
The engine code is stamped on the top of the engine block, near the bellhousing mating face. For FA24F, look for the turbocharger and intercooler. For FA24D (BRZ/GR86), look for the D-4S badge on the engine cover. Enter your registration above if you're unsure - we'll confirm your exact FA24 variant before any quotes are sent.
Easily Confused
EJ25
- the 2.5-litre turbo (EJ255/EJ257) that the FA24 replaced in performance applications. The FA24 offers more torque, better fuel efficiency, and a more modern design with direct injection and a semi-closed deck block, but some EJ25 enthusiasts prefer the older engine's character and lower-end torque delivery.
Alternative / Next-Gen Code
FA20
- the 2.0-litre turbo (FA20F) that the FA24 replaced in the WRX and Forester XT. The FA24 is essentially a stroked version of the FA20, with an increased bore (94.0mm vs 86.0mm) and longer stroke (86.0mm vs 86.0mm) - same stroke but larger bore, resulting in 400cc more displacement and significantly more torque across the rev range.
Related JLR Variants
FA20F
- the 2.0-litre turbocharged FA engine that preceded the FA24 in the WRX and Forester XT. Shares the same architecture but with less displacement and lower torque output. The FA24 improved on the FA20F with a semi-closed deck block, improved cooling, and better rod strength.
Confirm the exact FA24 fitment
The engine code is stamped on the top of the engine block, near the bellhousing mating face. For FA24F, look for the turbocharger and intercooler. For FA24D (BRZ/GR86), look for the D-4S badge on the engine cover. Enter your registration above if you're unsure - we'll confirm your exact FA24 variant before any quotes are sent.
Buying Guide
Buying a Replacement FA24 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used FA24 makes sense only if it comes with documented service history and - critically - evidence that the oil system has been inspected for RTV sealant debris. Used FA24s from WRX or BRZ/GR86 applications are often from cars that have been driven hard; track use without oil system upgrades can lead to bearing wear. A used engine without oil system inspection is a high-risk purchase.
Reconditioned:
A proper FA24 recon addresses the known weak points: for FA24F, new timing chain tensioner and guides, new water pump, thorough carbon cleaning of intake valves, and - critically - a full inspection and cleaning of the oil pickup and pan to remove any RTV sealant debris. For track-use cars, an upgraded oil pickup and baffled oil pan should be fitted. A 12-month warranty is standard. Reconditioned units are the sweet spot for most owners - you get the reliability upgrades without the cost of a full rebuild.
Rebuilt:
A full FA24 rebuild is justified when you own a high-value example (e.g., a VB WRX or BRZ) and want the engine to last another 150,000+ miles - particularly if you track the car. An upgraded rebuild should include forged pistons and rods (especially if you plan to modify), ARP head studs, a baffled oil pan, an upgraded oil pickup, and an oil cooler. Budget £5,000-£7,000 for a quality rebuild. For big power builds (400+ WHP), budget for a closed-deck short block.
Supply & Fit Line:
All of our vetted UK Subaru specialists offer supply-only or full supply-and-fit - nationwide delivery and recovery available, with warranties that cover both parts and labour.
Vehicle Value Note:
The FA24 sits in premium and performance Subaru models - Outback XT values range from £15,000-£35,000; Legacy XT £12,000-£28,000; WRX VB £20,000-£40,000; BRZ/GR86 £18,000-£32,000 depending on year and mileage. A reconditioned FA24 at £3,500-£5,000 represents 15-35% of vehicle value - generally viable. However, for a high-mileage example approaching the lower end of the value range, a full rebuild at £7,000 may approach 30-50% of vehicle value - evaluate the car's overall condition, chassis health, and transmission before committing. The FA24 is a relatively new engine; used units are scarce, making reconditioned or rebuilt options the more reliable choice. .
Compare FA24 Engine Prices Now --- **
Related Engines
Engines Related to the Subaru FA24
Explore engines that are closely related to the Subaru FA24, including its predecessor, successor, and key family variants.
Predecessor
EJ25
- the 2.5-litre turbo (EJ255/EJ257) that the FA24 replaced in performance applications. The FA24 offers more torque, better fuel efficiency, and a more modern design with direct injection and a semi-closed deck block, but some EJ25 enthusiasts prefer the older engine's character and lower-end torque delivery.
Predecessor
FA20
- the 2.0-litre turbo (FA20F) that the FA24 replaced in the WRX and Forester XT. The FA24 is essentially a stroked version of the FA20, with an increased bore (94.0mm vs 86.0mm) and longer stroke (86.0mm vs 86.0mm) - same stroke but larger bore, resulting in 400cc more displacement and significantly more torque across the rev range.
Sibling
FA20F
- the 2.0-litre turbocharged FA engine that preceded the FA24 in the WRX and Forester XT. Shares the same architecture but with less displacement and lower torque output. The FA24 improved on the FA20F with a semi-closed deck block, improved cooling, and better rod strength.
FAQ
Subaru FA24Frequently Asked Questions
Question 1How much does a Subaru FA24 engine replacement cost-
A reconditioned FA24 supply-only costs £3,500-£5,000, with fitted prices from £4,500-£6,200. Used units start from £2,500 supply-only. Rebuilt engines with forged internals cost £5,000-£7,000 supply-only.
- Used units start from £2,500 supply-only.
- Rebuilt engines with forged internals cost £5,000-£7,000 supply-only.
Question 2What are the most common FA24 engine problems-
The FA24 suffers from oil starvation (especially on track), excessive RTV sealant blocking the oil pickup, carbon buildup on intake valves (FA24F direct injection), heat sensitivity, and plastic timing chain guides. Oil system upgrades (baffled pan, improved pickup) cost £500-£1,000. RTV inspection/cleaning costs £300-£600. Carbon cleaning costs £300-£600.
- Oil system upgrades (baffled pan, improved pickup) cost £500-£1,000.
- RTV inspection/cleaning costs £300-£600.
- Carbon cleaning costs £300-£600.
Question 3Which Subaru models use the FA24 engine-
The turbocharged FA24F (FA24DIT) is fitted to the Subaru Ascent (2018-present), Outback XT (2019-present), Legacy XT (2019-present), Levorg (2020-present), and WRX VB (2022-present). The naturally aspirated FA24D is fitted to the Subaru BRZ (2022-present) and Toyota GR86 (2022-present). These are completely different engines and are NOT interchangeable.
- The naturally aspirated FA24D is fitted to the Subaru BRZ (2022-present) and Toyota GR86 (2022-present).
- These are completely different engines and are NOT interchangeable.
Question 4Should I buy a used or reconditioned FA24-
A reconditioned FA24 is the safer choice - it includes RTV sealant inspection/removal, new timing chain tensioner, carbon cleaning, and a 12-month warranty. Used FA24s are only recommended with documented service history and evidence of oil system inspection. Any used FA24 without oil pickup inspection is a high-risk purchase.
- Used FA24s are only recommended with documented service history and evidence of oil system inspection.
- Any used FA24 without oil pickup inspection is a high-risk purchase.
Question 5What's the difference between FA24F and FA24D-
The FA24F is the turbocharged version (WRX, Outback XT, Ascent) with 10.6:1 compression, direct injection only, and 260-271 hp. The FA24D is the naturally aspirated version (BRZ/GR86) with 12.5:1 compression, Toyota D-4S dual injection (port + direct), and 228 hp. They are NOT interchangeable - different internals, fuel systems, ECU, and wiring. Only buy an engine that matches your model.
- They are NOT interchangeable - different internals, fuel systems, ECU, and wiring.
- Only buy an engine that matches your model.
Question 6How long does an FA24 engine last-
The FA24 is a relatively new engine - long-term reliability data is limited. With regular maintenance (oil changes every 5k-6k miles using 5W-30 for turbo or 0W-20 for NA), the FA24 should exceed 150,000 miles. Oil starvation is the main limit on track-used cars. RTV sealant issues can cause early failure - preventative inspection is recommended. Carbon buildup requires periodic cleaning on direct-injection models.
- Oil starvation is the main limit on track-used cars.
- RTV sealant issues can cause early failure - preventative inspection is recommended.
- Carbon buildup requires periodic cleaning on direct-injection models.
Compare Subaru FA24 Engine Prices Today
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