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Lexus 2AR-FSE Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 2.5-litre Atkinson-cycle D-4S hybrid petrol engine powering the Lexus ES300h, IS300h and selected Toyota hybrids - a sophisticated, smooth powerplant with a reputation for longevity, though early units (2010-2013) have documented head gasket and oil consumption concerns. Reconditioned units from around £2,200-£3,800 supply-only .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£1,500
Reconditioned from
£2,200
Rebuilt from
£3,500
GB
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Key Specs
Lexus 2AR-FSE - Specifications at a Glance
Engine Code
2AR-FSE
Fuel
Petrol Hybrid (Atkinson cycle, D-4S direct injection)
Configuration
2.5L (2,494 cc) inline-4, DOHC 16-valve, dual VVT-i, chain-driven
Power Output(s)
Engine: 178 hp (133 kW) @ 6,000 rpm; Motor: 143 hp (105 kW); System total: 220 hp (164 kW) - varies by application
Years Produced
2010-present
UK Models Fitted
Lexus ES300h, Lexus IS300h, Lexus GS300h - full list in Compatibility below
2025 UK Replacement Requests
Not tracked separately in EM proprietary data; reliable hybrid with moderate replacement demand
Replaced
2GR-FSE (3.5L V6) in some models; 2AR-FE in non-hybrid applications
Replaced By
A25A-FXS (2.5L Dynamic Force hybrid) in newer Lexus models
Most Common Failure
Head gasket failure (early 2010-2013 units) / oil consumption
Reconditioned Price Range
£2,200-£3,800 supply-only
Vetted UK specialists for 2AR-FSE replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Lexus (and Toyota) Models Use the 2AR-FSE-
TAG: Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Lexus ES300h | XV60 (6th Gen ES) | 300h | 2012-2018 | |
| Lexus ES300h | XZ10 (7th Gen ES) | 300h | 2018-present | |
| Lexus IS300h | XE30 (3rd Gen IS) | 300h | 2013-2020 | |
| Lexus GS300h | L10 (4th Gen GS) | 300h | 2013-2018 | |
| Lexus Toyota Crown | JDM (S200 series) | Hybrid | 2010-2017 |
02
Lexus ES300h
03
Lexus IS300h
04
Lexus GS300h
05
Lexus Toyota Crown
CROSS-BRAND
2AR-FSE is documented across 5 BMW applications spanning Lexus ES300h, Lexus IS300h, Lexus GS300h, Toyota Crown. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Lexus 2AR-FSE Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £1,500-£2,500 | £2,200-£3,400 | 3-6 months |
Reconditioned | £2,200-£3,800 | £2,900-£4,800 | 12-24 months |
Rebuilt | £3,500-£5,500 | £4,200-£6,600 | 12-24 months |
What moves the price most for this engine is whether the replacement unit has had the head gasket replaced (early units) and whether the water pump and EGR cooler are fresh. A reconditioned 2AR-FSE with a documented head gasket replacement and decarbonised intake valves will command a premium - and is often worth it for the peace of mind in a premium hybrid. See our full reconditioned engine cost guide for more detail.
Labour Guide
Fitting a 2AR-FSE typically takes 10-14 hours at £65-£85/hr (independent Lexus hybrid specialist) - the hybrid system adds complexity during removal and refitting .
Price Factors
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Common Problems
Lexus 2AR-FSE Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 2AR-FSE, based on real-world data and verified failure patterns.
Verified issue focus: Head gasket failure (early 2010-2013 units) / oil consumption.
1. Head gasket failure - 2010-2013 ES300h, IS300h, GS300h
1. Head gasket failure - 2010-2013 ES300h, IS300h, GS300h
Typical onset:
80,000-150,000 miles
What happens:
Early 2AR-FSE engines have a known susceptibility to head gasket failure, similar to the 2ZR-FXE. The gasket between cylinders 2 and 3 can develop a breach, allowing coolant to enter the combustion chamber. Symptoms include a rough cold start (misfire that clears after a few seconds), loss of coolant, and white smoke from the exhaust on start-up. If ignored, coolant contamination can damage the catalytic converter and hybrid system components.
Repair vs replace:
A head gasket replacement on a 2AR-FSE is a significant job - typically £1,500-£2,800 at a specialist. If caught early, repair is viable. If the engine has overheated or the coolant has contaminated the oil, a reconditioned replacement engine is usually more cost-effective.
Read more about this issue
2. Oil consumption - piston ring wear (early 2AR-FSE)
2. Oil consumption - piston ring wear (early 2AR-FSE)
Typical onset:
80,000+ miles
What happens:
Like many direct-injection engines, the 2AR-FSE can experience oil consumption due to worn or stuck piston rings. This is more pronounced on early units (2010-2013) and vehicles that have had extended oil change intervals. Consumption of 1 litre per 1,000 miles is not uncommon.
Repair vs replace:
For moderate consumption, switching to a slightly thicker oil (e.g., 5W-30 instead of 0W-20) can help. Severe cases require piston ring replacement - an engine-out job that often makes a reconditioned exchange unit more economical.
Read more about this issue
3. Water pump and EGR cooler leaks
3. Water pump and EGR cooler leaks
Typical onset:
60,000-100,000 miles
What happens:
The electric water pump and EGR cooler on the 2AR-FSE can develop coolant leaks over time. The water pump is a known weak point; if it fails, the engine can overheat, accelerating head gasket failure. The EGR cooler can also develop internal leaks, allowing coolant to enter the intake.
Repair vs replace:
Both components are replaceable as standalone items (£400-£800 each). Neither typically writes off the engine - but ignoring either can lead to the head gasket failure mentioned above.
Read more about this issue
Post-2013 2AR-FSE units received a revised head gasket part number. Failures on 2014+ models are significantly less common, though still possible at very high mileage. Regular coolant changes (every 5 years / 50,000 miles) and using the correct 0W-20 or 5W-30 oil are the best preventative measures.
Compare rebuilt 2AR-FSE prices with the failure already addressed
Engine Variants
How to Confirm You Have the 2AR-FSE
The 2AR-FSE is Lexus's 2.5-litre Atkinson-cycle hybrid D-4S engine, used in the ES300h, IS300h, and GS300h. The code is physically stamped on the engine block - typically on the front side of the block, just below the cylinder head, or on a machined pad near the bellhousing. Commonly confused with: - 2AR-FE - the 2.5-litre conventional (Otto-cycle) engine used in non-hybrid Toyota Camry, RAV4, and the Lexus ES250 (export markets). It has port injection rather than D-4S, and is not hybrid-tuned. Not a straight swap. - 2AR-FXE - the 2.5-litre Atkinson-cycle hybrid engine used in the Toyota Camry Hybrid and Lexus NX300h. It shares the same block but has different ECU calibration, intake, and hybrid system integration - not a direct interchange without significant rework. - A25A-FXS - the newer 2.5-litre Dynamic Force hybrid engine fitted to the 7th-gen ES300h and current Camry Hybrid. It is a completely different engine family with higher efficiency and power - not interchangeable.
*Not sure- Enter your registration above and we'll confirm your exact 2AR-FSE fitment.*
Easily Confused
2GR-FSE
the 3.5-litre V6 used in pre-hybrid Lexus IS350 and GS350. In models like the GS, the 2AR-FSE replaced the 2GR-FSE for hybrid duty, offering lower fuel consumption with comparable refinement - though significantly less power.
Alternative / Next-Gen Code
A25A-FXS
the 2.5-litre Dynamic Force hybrid engine introduced in the 7th-generation ES300h (XZ10) and current Camry Hybrid. It offers significantly higher thermal efficiency (41%) and improved power output (215 hp system total), and it replaces the 2AR-FSE in newer Lexus and Toyota hybrids. It is a completely different engine family - not a swap option.
Related JLR Variants
2AR-FXE
the Atkinson-cycle 2.5-litre hybrid engine used in the Toyota Camry Hybrid and Lexus NX300h. It shares the same block and basic architecture but has different D-4S calibration, intake manifold, and hybrid control logic. It is not a direct swap for the 2AR-FSE without significant ECU rework.
Confirm the exact 2AR-FSE fitment
*Not sure- Enter your registration above and we'll confirm your exact 2AR-FSE fitment.*
Buying Guide
Buying a Replacement 2AR-FSE - 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 2AR-FSE can be a cost-effective choice for older ES300h/IS300h values, provided the donor has documented service history. The key checks are: (1) has the head gasket been replaced (especially on 2010-2013 units)- (2) does the engine have a recent water pump- A used unit with a documented head gasket replacement and less than 80,000 miles offers excellent value. Link once: [used engines service]
Reconditioned:
A properly reconditioned 2AR-FSE should include a new head gasket (preferably the revised post-2013 part number), new piston rings (to address oil consumption), a new water pump, and a full top-end gasket set. The timing chain is rarely an issue, but a thorough inspection is standard. This is the sweet spot for owners - you get a like-new engine with the known weaknesses addressed, at a fraction of the cost of a new unit from Lexus. Reconditioned units typically come with a 12-24 month warranty. Link once: [reconditioned engines service]
Rebuilt:
A full rebuild is only justified for low-mileage, cherished vehicles (e.g. a clean-car IS300h with low chassis miles). A quality rebuild will include bottom-end bearings, piston rings, valve guides, seals, and a full timing system refresh. This is the most expensive option but offers the closest thing to a new engine. Link once: [rebuilt engines service]
Supply & Fit Line:
All options above can be supplied and fitted through our network of vetted UK Lexus and Toyota specialists. Each quote includes warranty details and delivery options. Link once: [supply and fit service]
Vehicle Value Note:
The 2AR-FSE sits in vehicles worth £6,000-£18,000 depending on year and mileage (ES300h, IS300h). A reconditioned engine at £2,200-£3,800 represents roughly 20-40% of the car's value - which is a justifiable investment for a premium hybrid that, once refreshed, will outlast the chassis. For a higher-mileage IS300h worth under £6,000, a used engine with a solid warranty is often the most sensible financial choice. Always factor in the condition of the hybrid battery and gearbox before committing to an expensive reconditioned engine.
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Related Engines
Engines Related to the Lexus 2AR-FSE
Explore engines that are closely related to the Lexus 2AR-FSE, including its predecessor, successor, and key family variants.
Predecessor
2GR-FSE
the 3.5-litre V6 used in pre-hybrid Lexus IS350 and GS350. In models like the GS, the 2AR-FSE replaced the 2GR-FSE for hybrid duty, offering lower fuel consumption with comparable refinement - though significantly less power.
Successor
A25A-FXS
the 2.5-litre Dynamic Force hybrid engine introduced in the 7th-generation ES300h (XZ10) and current Camry Hybrid. It offers significantly higher thermal efficiency (41%) and improved power output (215 hp system total), and it replaces the 2AR-FSE in newer Lexus and Toyota hybrids. It is a completely different engine family - not a swap option.
Sibling
2AR-FXE
the Atkinson-cycle 2.5-litre hybrid engine used in the Toyota Camry Hybrid and Lexus NX300h. It shares the same block and basic architecture but has different D-4S calibration, intake manifold, and hybrid control logic. It is not a direct swap for the 2AR-FSE without significant ECU rework.
FAQ
Lexus 2AR-FSEFrequently Asked Questions
Question 1How much does a Lexus 2AR-FSE engine replacement cost-
A reconditioned 2AR-FSE typically costs £2,200-£3,800 supply-only, with fitted prices around £2,900-£4,800. Used units start from £1,500-£2,500, and full rebuilds from £3,500-£5,500. Get a 2AR-FSE quote now
- These are UK independent specialist estimates ; main dealers will be significantly higher.
- Prices vary based on whether the replacement includes a new head gasket (early units) and water pump.
- Always get three quotes to compare.
Question 2What is the most common problem with the 2AR-FSE-
The most widely reported failure is head gasket failure, especially on 2010-2013 ES300h, IS300h, and GS300h models. Symptoms include a rough cold-start misfire that clears after a few seconds, coolant loss, and white smoke on startup. Compare prices for a 2AR-FSE with head gasket already addressed
- A head gasket replacement costs £1,500-£2,800 .
- If caught early, repair is viable; if ignored, the engine may need full replacement.
- Post-2013 units have a revised gasket and fail far less often.
Question 3Which cars have the 2AR-FSE engine-
The 2AR-FSE is fitted to: It is also used in some JDM Toyota models, but those are specialist imports. See the full compatibility list above
- Lexus ES300h (XV60, 2012-2018; XZ10, 2018-present)
- Lexus IS300h (XE30, 2013-2020)
- Lexus GS300h (L10, 2013-2018)
- Toyota Crown Hybrid (JDM, S200 series)
Question 4Should I buy a used or reconditioned 2AR-FSE-
For lower-value vehicles (e.g. an older IS300h under £6,000), a used engine with a solid warranty is often the most sensible choice, provided the donor has documented history and a recent head gasket replacement (if pre-2013). For cars worth £8,000+, a reconditioned unit is the sweet spot - it comes with a new head gasket (revised part), new piston rings, fresh water pump, and a 12-24 month warranty. Rebuilt engines are only recommended for very low-mileage or cherished examples. Compare used vs reconditioned 2AR-FSE prices
- Always confirm the replacement unit has addressed the head gasket and water pump.
Question 5How do I know if my Lexus has the 2AR-FSE-
The engine code is stamped on the block (typically on the front side, just below the cylinder head) and is also on your V5C under “Engine number”. Alternatively, enter your registration above and we'll confirm your exact fitment. Check your engine via registration
- Don’t confuse it with the 2AR-FE (non-hybrid, port-injected) or the 2AR-FXE (different hybrid calibration) - they are not interchangeable.
- If your ES, IS, or GS is a hybrid with a 2.5-litre petrol engine, it’s almost certainly the 2AR-FSE.
Question 6How long does a 2AR-FSE engine typically last-
With proper maintenance, the 2AR-FSE can exceed 200,000 miles. The engine is chain-driven, so no timing belt replacement is needed. Regular oil changes (every 10,000 miles or 12 months) and coolant flushes (every 5 years) are critical to head gasket and water pump longevity. Many UK Lexus hybrids have clocked 200,000+ miles on the original engine. The early head gasket issue is a known risk, but once addressed with a revised gasket, the engine is extremely durable. A reconditioned unit, when fitted properly, should provide another 150,000+ miles of reliable service.
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Get free, no-obligation quotes from our network of UK Lexus and Toyota hybrid specialists. Every quote is tailored to your exact 2AR-FSE sub-code and vehicle, and our registration lookup confirms fitment before any quotes are sent. With reconditioned 2AR-FSE units typically from around £2,200, comparing takes two minutes and could save you hundreds or even thousands. META & SCHEMA PACKAGE
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Minimum 12-Month Warranty
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