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Honda L15B7 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 1.5-litre turbocharged petrol Honda L15B7 fitted to the current Civic, CR-V, and HR-V lineup, delivering up to 180hp. Reconditioned Honda L15B7 units are available from £1,800 , supported by 120 UK replacement requests in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£600
Reconditioned from
£1,800
Rebuilt from
£3,000
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Honda L15B7 - Specifications at a Glance
Engine Code
L15B7
Fuel
Petrol
Configuration
1.5L inline-4, single turbo, VTEC
Power Output(s)
130 kW (174 hp) to 134 kW (180 hp)
Years Produced
2016-Present
UK Models Fitted
3 primary Honda models - full list in Compatibility below
2025 UK Replacement Requests
120
Replaced
R18A2 (1.8L i-VTEC naturally aspirated)
Replaced By
Still in production (successor variants include updated oil dilution software revisions)
Most Common Failure
Oil dilution and injector failure
Reconditioned Price Range
£1,800-£3,200 supply-only
Vetted UK specialists for L15B7 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Honda Models Use the L15B7-
The Honda L15B7 is the brand's modern, high-efficiency turbocharged workhorse, replacing older naturally aspirated engines across the core Civic, CR-V, and HR-V lineup to deliver better torque and fuel economy.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Honda Civic | FK7 / FK8 / FK9 | 1.5 VTEC Turbo | 2017-Present | |
| Honda CR-V | RW5 | 1.5 VTEC Turbo | 2018-Present | |
| Honda HR-V | RV3 | 1.5 VTEC Turbo | 2018-Present |
02
Honda CR-V
03
Honda HR-V
CROSS-BRAND
L15B7 is documented across 3 BMW applications spanning Honda Civic, Honda CR-V, Honda HR-V. 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 Honda L15B7 fitment before any quotes are sent.
Prices
Honda L15B7 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £600-£1,400 | £1,120-£2,050 | 3-6 months |
Reconditioned | £1,800-£3,200 | £2,320-£3,850 | 12-24 months |
Rebuilt | £3,000-£5,000 | £3,520-£5,650 | 12-24 months |
The final cost of a Honda L15B7 engine replacement depends heavily on whether the oil dilution software update has been applied and the condition of the fuel injectors. Rebuilt units command a premium because they include updated piston rings, refreshed injectors, and a full inspection for any oil contamination damage. For a complete breakdown of how these factors impact your budget, see our full reconditioned engine cost guide .
Labour Guide
Fitting a Honda L15B7 typically takes 8-10 hours at £65/hr (independent specialist) - confirm exact labour when comparing quotes .
Price Factors
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Common Problems
Honda L15B7 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the L15B7, based on real-world data and verified failure patterns.
Verified issue focus: Oil dilution and injector failure.
1. Oil Dilution (Fuel in Oil) - Cold Weather / Short Trips
1. Oil Dilution (Fuel in Oil) - Cold Weather / Short Trips
Typical onset:
40,000-80,000 miles
What happens:
The direct-injection system on the L15B7 can allow unburnt fuel to seep into the oil sump, particularly during repeated short, cold-weather trips. This dilutes the engine oil, reducing its lubrication properties and potentially leading to accelerated bearing wear or turbocharger failure if left unchecked.
Repair vs replace:
Honda issued a software update and revised oil change intervals to mitigate this issue. If caught early, an oil change and software update are sufficient (£150-£300). However, if severe dilution has caused bearing or turbo damage, a full Honda L15B7 replacement is required.
Read more about this issue
2. Fuel Injector Failure
2. Fuel Injector Failure
Typical onset:
40,000-80,000 miles
What happens:
The high-pressure fuel injectors can clog or fail due to carbon buildup or internal wear. This leads to rough idling, misfires, poor fuel economy, and persistent check engine lights.
Repair vs replace:
A standalone injector replacement is viable (£600-£1,200). If multiple injectors have failed or if carbon buildup has caused secondary intake valve issues, a reconditioned or rebuilt Honda L15B7 may be the more sensible long-term investment.
Read more about this issue
Models produced from 2020 onwards received updated engine management software and revised piston rings, significantly reducing the incidence of oil dilution reports .
Compare rebuilt Honda L15B7 prices with the failure already addressed
Engine Variants
How to Confirm You Have the Honda L15B7
Because the Honda 1.5-litre family spans multiple naturally aspirated and turbocharged variants, confirming your exact code is essential before purchasing a replacement. The L15B7 is the specific 1.5-litre turbocharged variant for the Civic, CR-V, and HR-V. Where to find it: The engine code is stamped directly on the engine block (typically near the oil filter housing) and is explicitly listed on your V5C registration document under "Engine Capacity/Code". It can also be verified via a VIN decode through a Honda dealer. Commonly confused codes: Owners frequently mistake the L15B7 for the older L15B2 (the naturally aspirated 1.5L variant found in the Jazz/Fit) or the newer L15C2 (the updated 1.5L variant for the latest Jazz/Fit). Why it matters: While they share the same 1.5L block architecture, the Honda L15B7 features a turbocharger, intercooler, specific ECU mapping, and reinforced internals. Attempting to swap in a naturally aspirated L15B2 or L15C2 without the corresponding turbo, ECU, and intake components will result in a non-running vehicle and severe compatibility errors.
Not sure which engine your car has- Enter your registration at the top of the page - we'll confirm your exact Honda L15B7 fitment before any quotes are sent.
Easily Confused
R18A2
- the naturally aspirated 1.8-litre i-VTEC engine that preceded it in the Civic and CR-V, offering legendary reliability but lacking the low-end torque and fuel efficiency of the modern turbocharged L15B7.
Alternative / Next-Gen Code
Still in active production, though newer iterations (such as the L15C7 in the latest Civic) feature updated thermal management and revised piston rings to further mitigate the oil dilution concerns associated with early L15B7 units.
Related JLR Variants
L15C2
- the 1.5-litre naturally aspirated VTEC variant found in the Jazz and Fit. While it shares the same fundamental block architecture, it lacks the turbocharger and direct-injection system, making it entirely incompatible as a direct swap.
Confirm the exact L15B7 fitment
Not sure which engine your car has- Enter your registration at the top of the page - we'll confirm your exact Honda L15B7 fitment before any quotes are sent.
Buying Guide
Buying a Replacement Honda L15B7 - 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 Honda L15B7 is only advisable if it comes with a comprehensive, stamped service history proving the oil dilution software update has been applied and regular oil changes have been maintained. Given the known risks of oil contamination, buying a used Honda L15B7 for sale with unknown maintenance is a high-risk gamble. Browse vetted used Honda L15B7 engines for sale
Reconditioned:
This is the most balanced and recommended choice for most owners. A proper reconditioning process for the Honda L15B7 will replace the fuel injectors, apply the latest oil dilution software update, and perform a thorough inspection for any oil contamination damage. This restores the full 180hp output while eliminating the known weak points. Compare reconditioned Honda L15B7 options
Rebuilt:
A full rebuild is justified for high-mileage examples where the block is still sound but internal wear (such as piston ring or bearing wear) is advanced. A professional rebuild of the Honda L15B7 will include new bottom-end bearings, updated piston rings, and all-new sealing components, offering near-new longevity for the platform. Explore rebuilt Honda L15B7 specifications
Supply & Fit Line:
For complex turbocharged engines like the Honda L15B7, we strongly recommend utilizing our supply and fit network . This ensures the installing specialist assumes full warranty responsibility for both the parts and the labour, protecting you from finger-pointing if an issue arises.
Vehicle Value Note:
Host vehicles for the Honda L15B7 (such as the Civic FK, CR-V RW, and HR-V) typically retain strong market values between £10,000 and £28,000 depending on age, mileage, and condition. With a reconditioned replacement costing £1,800-£3,200, the repair sits comfortably within the vehicle's value band, making replacement a financially viable and sensible decision compared to scrapping .
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Related Engines
Engines Related to the Honda L15B7
Explore engines that are closely related to the Honda L15B7, including its predecessor, successor, and key family variants.
Predecessor
R18A2
- the naturally aspirated 1.8-litre i-VTEC engine that preceded it in the Civic and CR-V, offering legendary reliability but lacking the low-end torque and fuel efficiency of the modern turbocharged L15B7.
Successor
Still in active production, though newer iterations (such as the L15C7 in the latest Civic) feature updated thermal management and revised piston rings to further mitigate the oil dilution concerns associated with early L15B7 units.
Sibling
L15C2
- the 1.5-litre naturally aspirated VTEC variant found in the Jazz and Fit. While it shares the same fundamental block architecture, it lacks the turbocharger and direct-injection system, making it entirely incompatible as a direct swap.
FAQ
Honda L15B7Frequently Asked Questions
Question 1How much does a Honda L15B7 engine replacement cost-
A reconditioned Honda L15B7 engine starts from £1,800 for supply-only, with fully fitted replacements typically ranging from £2,320 to £3,850 depending on the specialist. Prices vary based on whether the fuel injectors and updated piston rings are included in the rebuild. Labour typically requires 8-10 hours at independent specialist rates. Rebuilt units command a premium but include comprehensive internal inspections and updated components.
- Prices vary based on whether the fuel injectors and updated piston rings are included in the rebuild.
- Labour typically requires 8-10 hours at independent specialist rates.
- Rebuilt units command a premium but include comprehensive internal inspections and updated components.
Question 2What is the most common failure with the Honda L15B7-
The most documented failure pattern is oil dilution (fuel mixing with engine oil) and injector failure, typically occurring between 40,000 and 80,000 miles. Repeated short, cold-weather trips prevent the engine from reaching optimal temperature, allowing unburnt fuel to seep past the piston rings into the sump. This dilutes the oil, reducing its lubrication properties and potentially leading to accelerated bearing or turbocharger wear. Honda has issued software updates to mitigate this, but severe cases require a full unit replacement.
- Repeated short, cold-weather trips prevent the engine from reaching optimal temperature, allowing unburnt fuel to seep past the piston rings into the sump.
- This dilutes the oil, reducing its lubrication properties and potentially leading to accelerated bearing or turbocharger wear.
- Honda has issued software updates to mitigate this, but severe cases require a full unit replacement.
Question 3Which models use the L15B7 engine-
The Honda L15B7 was fitted to the current generation of core Honda models from 2016 onwards, including the Civic (FK), CR-V (RW), and HR-V. It delivers up to 180hp and serves as the brand's primary high-efficiency turbocharged petrol engine. It was never used in older naturally aspirated models or hybrid-only variants. Always verify your specific fitment using your registration number.
- It delivers up to 180hp and serves as the brand's primary high-efficiency turbocharged petrol engine.
- It was never used in older naturally aspirated models or hybrid-only variants.
- Always verify your specific fitment using your registration number.
Question 4Should I buy a used or reconditioned Honda L15B7-
A reconditioned Honda L15B7 is strongly recommended over a used unit to prevent catastrophic secondary damage. Used units carry a high risk of hidden oil dilution damage or clogged injectors if previous software updates and strict oil change intervals were not followed. A proper reconditioning process replaces the fuel injectors, applies the latest engine management software, and performs a thorough inspection for oil contamination. Reconditioned units come with a 12 to 24-month warranty, providing essential peace of mind.
- Used units carry a high risk of hidden oil dilution damage or clogged injectors if previous software updates and strict oil change intervals were not followed.
- A proper reconditioning process replaces the fuel injectors, applies the latest engine management software, and performs a thorough inspection for oil contamination.
- Reconditioned units come with a 12 to 24-month warranty, providing essential peace of mind.
Question 5How do I know if my car has the L15B7 and not the L15C2-
Check your V5C registration document or the physical stamp on the engine block near the oil filter housing. The L15B7 is the specific 1.5-litre turbocharged direct-injection variant for the Civic, CR-V, and HR-V. The L15C2 is the naturally aspirated 1.5-litre variant found in the Jazz and Fit. Fitting the wrong revision without the corresponding turbocharger, ECU, and intake components will result in a non-running vehicle and severe compatibility errors.
- The L15B7 is the specific 1.5-litre turbocharged direct-injection variant for the Civic, CR-V, and HR-V.
- The L15C2 is the naturally aspirated 1.5-litre variant found in the Jazz and Fit.
- Fitting the wrong revision without the corresponding turbocharger, ECU, and intake components will result in a non-running vehicle and severe compatibility errors.
Compare Honda L15B7 Engine Prices Today
Vetted UK specialists who work on the L15B7 and the wider Honda VTEC Turbo family every week Minimum 12-month warranty on every reconditioned and rebuilt Honda L15B7 Nationwide delivery - supply-only or full supply & fit options available Finding a reliable replacement for a modern, high-efficiency turbocharged engine doesn't have to be a gamble. Our free, no-obligation comparison service connects you directly with specialist suppliers who understand the unique demands of the L15B7. Simply enter your registration, and we will confirm your exact fitment before any quotes are sent, ensuring you receive accurate pricing for your specific Civic, CR-V, or HR-V. With reconditioned Honda L15B7 units starting from £1,800, comparing your options takes just two minutes and could save you hundreds on your repair.
Vetted UK Specialists
Vetted UK specialists for L15B7 replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
Expert Support
Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
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