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Vauxhall A14NET Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The Vauxhall A14NET is the 1.4-litre turbocharged petrol engine that powered the Astra, Corsa and Mokka between 2009 and 2017 - reconditioned units from £900, with 150 UK replacement requests in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£300
Reconditioned from
£900
Rebuilt from
£1,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Vauxhall A14NET - Specifications at a Glance
Engine Code
A14NET
Fuel
Petrol
Configuration
1.4L inline-4, single turbocharger, DOHC 16-valve, VVT
Power Output(s)
140 hp (103 kW); 147 lb-ft (200 Nm)
Years Produced
2009-2017
UK Models Fitted
3 Vauxhall models - full list in Compatibility below
2025 UK Replacement Requests
150
Replaced
Z14XEP - naturally aspirated predecessor
Replaced By
B14XER - later naturally aspirated variant
Most Common Failure
Turbocharger failure / timing chain stretch
Reconditioned Price Range
£900-£1,800 supply-only
Vetted UK specialists for A14NET replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Vauxhall Models Use the A14NET-
**TAG:** Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Vauxhall Astra | J | 1.4i Turbo (140 hp) | 2009-2015 | |
| Vauxhall Astra | K | 1.4i Turbo (140 hp) | 2015-2017 | |
| Vauxhall Corsa | D | 1.4i Turbo (140 hp) | 2010-2014 | |
| Vauxhall Corsa | E | 1.4i Turbo (140 hp) | 2014-2017 | |
| Vauxhall Mokka | A | 1.4i Turbo (140 hp) | 2012-2017 |
02
Vauxhall Astra
03
Vauxhall Corsa
04
Vauxhall Corsa
05
Vauxhall Mokka
CROSS-BRAND
A14NET is documented across 5 BMW applications spanning Vauxhall Astra, Vauxhall Corsa, Vauxhall Mokka. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Vauxhall A14NET Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £300-£700 | £455-£1,100 | 3-6 months |
Reconditioned | £900-£1,800 | £1,055-£2,200 | 12-24 months |
Rebuilt | £1,500-£2,800 | £1,655-£3,200 | 12-24 months |
All from Table A . Fitted = supply price + labour band below.
Labour Guide
Fitting an A14NET typically takes 7-10 hours at £65-£91/hr (independent) - confirm exact labour when comparing quotes.
Price Factors
What moves the price on an A14NET is the condition of the turbocharger, whether the timing chain has been replaced, and whether the engine has suffered from cooling system leaks. A reconditioned unit that includes a new turbo, timing chain and gaskets commands a premium over a used take-out. See our full reconditioned engine cost guide.
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Common Problems
Vauxhall A14NET Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the A14NET, based on real-world data and verified failure patterns.
Verified issue focus: Turbocharger failure / timing chain stretch.
1. Turbocharger Failure - Oil Starvation & Bearing Wear
1. Turbocharger Failure - Oil Starvation & Bearing Wear
Typical onset:
60,000-100,000 miles
What happens:
The A14NET's turbocharger is a common failure point, particularly on high-mileage examples. Oil starvation (often caused by the variable valve timing oil filter housing blocking) leads to bearing wear and eventual turbo failure. Symptoms include loss of power, blue smoke from the exhaust, and a whining noise from the turbo.
Repair vs replace:
If caught early, turbo refurbishment is a specialist job (£400-£800). If the turbo has failed catastrophically (shaft snapped, turbine damaged), a full replacement is required - and the oil system must be flushed to prevent debris from destroying the new turbo. A used engine may be the most cost-effective option. Read our full turbocharger failure guide
Read more about this issue
2. Timing Chain Stretch - Rattling on Start-Up
2. Timing Chain Stretch - Rattling on Start-Up
Typical onset:
60,000-100,000 miles
What happens:
The A14NET uses a timing chain that can stretch over time, particularly on engines with long oil change intervals or poor-quality oil. Symptoms include rattling on cold start-up, poor performance, and check-engine lights. The tensioner can also weaken, allowing chain slap.
Repair vs replace:
Timing chain and tensioner replacement is a manageable repair (£500-£1,000). If the chain has jumped and valves have contacted pistons, the engine is typically beyond economical repair - a full replacement is the only option. Read our full timing chain failure guide
Read more about this issue
3. Cooling System Leaks - Thermostat Housing & Water Pump
3. Cooling System Leaks - Thermostat Housing & Water Pump
Typical onset:
50,000-80,000 miles
What happens:
The A14NET's plastic thermostat housing and water pump are prone to leaks, particularly on higher-mileage examples. Coolant loss can lead to overheating, which can cause head gasket failure and warped cylinder heads.
Repair vs replace:
Thermostat housing and water pump replacement is a straightforward repair (£200-£500). If the engine has overheated, a full replacement may be required.
Read more about this issue
The A14NET was replaced by the B14XER in 2017, which addressed some of the turbo and chain issues. However, the A14NET's design vulnerabilities remain - regular oil changes and using the correct oil spec (Dexos 1) are critical to longevity.
Compare rebuilt A14NET prices with the turbo and chain already addressed
Engine Variants
How to Confirm You Have the A14NET
The A14NET is the 1.4-litre turbocharged petrol engine from GM's Family 0 range. It was the highest-output 1.4-litre turbo before the introduction of the 1.4i Turbo with start-stop (which used a different ECU calibration). The A14NET is distinguished from earlier and later variants by its 140 hp output and specific turbocharger and fuel system. Where the code appears: - Stamped on a metal plate on the engine block (left-hand side, near the timing cover) - On the V5C logbook under "Engine number" (the first 6 characters will read A14NET) - Via Vauxhall VIN decoder - the 8th character of the VIN indicates engine type Commonly confused with: - Z14XEP - naturally aspirated 1.4L (87-90 hp), no turbo, completely different character - B14XER - naturally aspirated 1.4L (100 hp), no turbo, later engine family - A14XEL - 1.4L turbo with start-stop (120 hp), different ECU calibration and turbocharger
Not sure which A14 variant you have- Enter your registration above and we'll confirm your exact engine code before sending any quotes.
Easily Confused
Z14XEP
- the 1.4-litre naturally aspirated petrol engine that preceded the A14NET in the Astra H and Corsa C/D. Produced 87-90 hp without turbocharging - a completely different character from the A14NET's 140 hp turbocharged performance.
Alternative / Next-Gen Code
B14XER
- the 1.4-litre naturally aspirated petrol engine that replaced the Z14XEP in later models. While not a direct successor to the A14NET (which was replaced by newer turbo engines), it represents the evolution of GM's Family 0 petrol engine.
Confirm the exact A14NET fitment
Not sure which A14 variant you have- Enter your registration above and we'll confirm your exact engine code before sending any quotes.
Buying Guide
Buying a Replacement A14NET - 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 A14NET can make sense for lower-value Astra J or Corsa D models where the car's value doesn't justify a recon unit. However, the turbocharger and timing chain are the biggest risks - only consider a used unit with documented proof of recent turbo and chain work. Without that, factor in £800-£1,500 for preventative work. Link once: /services/used-engines
Reconditioned:
A proper A14NET recon is the best option for owners planning to keep their car long-term. A quality recon should include: full strip and inspection, new turbocharger (critical), new timing chain and tensioner, new gaskets and seals, and a full test. With a 12-24 month warranty, this gives you peace of mind that the engine's known weaknesses have been addressed - well worth the £900-£1,800 supply cost. Link once: /services/reconditioned-engines
Rebuilt:
A full rebuild is justified when the original engine has suffered catastrophic failure (turbo disintegration with debris in the oil system, chain jump) and the car is a cherished keeper or low-mileage example. An upgraded rebuild should include new pistons/rings, refreshed cylinder head, new timing chain and guides, and a full oil system flush. This is specialist territory and typically only makes sense for cars with strong residual value. Link once: /services/rebuilt-engines
Supply & Fit Line:
All engines can be supplied and fitted through our network of vetted Vauxhall specialists nationwide, with 12-month warranty on reconditioned and rebuilt units. Link once: /services/supply-and-fit
Vehicle Value Note:
The A14NET typically sits in Astra J, Corsa D/E and Mokka - cars now worth £2,000-£8,000 depending on condition and mileage. With a reconditioned supply cost of £900-£1,800, replacement is viable on mid-range to higher-value examples. However, for a sub-£2,000 Corsa D or Astra J with high mileage, a used unit (£300-£700) with documented history may be the only sensible option. For cars worth under £1,500, evaluate scrap value before committing to a replacement engine.
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Related Engines
Engines Related to the Vauxhall A14NET
Explore engines that are closely related to the Vauxhall A14NET, including its predecessor, successor, and key family variants.
Predecessor
Z14XEP
- the 1.4-litre naturally aspirated petrol engine that preceded the A14NET in the Astra H and Corsa C/D. Produced 87-90 hp without turbocharging - a completely different character from the A14NET's 140 hp turbocharged performance.
Successor
B14XER
- the 1.4-litre naturally aspirated petrol engine that replaced the Z14XEP in later models. While not a direct successor to the A14NET (which was replaced by newer turbo engines), it represents the evolution of GM's Family 0 petrol engine.
FAQ
Vauxhall A14NETFrequently Asked Questions
Question 1How much does a Vauxhall A14NET engine replacement cost-
A reconditioned A14NET supply-only costs £900-£1,800, with fitted prices ranging from £1,055 to £2,200 depending on labour rates. Used units start at £300-£700, and full rebuilds run from £1,500-£2,800. Prices are supply-only; fitting adds 7-10 hours at independent specialist rates. Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
- Prices are supply-only; fitting adds 7-10 hours at independent specialist rates.
- Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
Question 2What are the most common failures on the A14NET-
The most documented issues are turbocharger failure (often caused by oil starvation from blocked VVT filters), timing chain stretch (causing rattling on start-up), and cooling system leaks from the thermostat housing and water pump. The A14NET's turbo is the biggest single failure point - regular oil changes with Dexos 1-spec oil are essential to protect it. Turbo failure: loss of power, blue smoke, whining noise. Timing chain: rattling on start-up is the early warning sign. Cooling system: plastic components degrade with age and heat.
- Turbo failure: loss of power, blue smoke, whining noise.
- Timing chain: rattling on start-up is the early warning sign.
- Cooling system: plastic components degrade with age and heat.
Question 3Which Vauxhall models use the A14NET engine-
The A14NET was fitted to Vauxhall Astra J (2009-2015) and Astra K (2015-2017) as the 1.4i Turbo (140 hp), Corsa D (2010-2014) and Corsa E (2014-2017) as the 1.4i Turbo, and Mokka A (2012-2017) as the 1.4i Turbo. Not to be confused with the A14XEL (120 hp turbo with start-stop). Not to be confused with the naturally aspirated Z14XEP or B14XER.
- Not to be confused with the A14XEL (120 hp turbo with start-stop).
- Not to be confused with the naturally aspirated Z14XEP or B14XER.
Question 4Should I buy a used or reconditioned A14NET engine-
A used A14NET can be viable for lower-value Astra J or Corsa D models, but only if it has documented proof of recent turbo and timing chain work. Without that, factor in £800-£1,500 for preventative work. A reconditioned engine is the safer choice - it includes new turbo, timing chain, gaskets and seals, with a 12-24 month warranty. Used is cheaper (£300-£700) but turbo and chain risks are significant. Reconditioned addresses all known weak points and gives peace of mind.
- Used: cheaper (£300-£700) but turbo and chain risks are significant.
- Reconditioned: addresses all known weak points and gives peace of mind.
Question 5How do I confirm if my car has the A14NET or the A14XEL-
Check the engine code stamped on the block (left-hand side near the timing cover) - it will read A14NET for the 140 hp variant, or A14XEL for the 120 hp variant with start-stop. The V5C logbook also lists the full engine number, with the first 6 characters identifying the code. A14NET: 140 hp, specific turbocharger and ECU calibration. A14XEL: 120 hp, start-stop system, different ECU and turbo. Fitting the wrong variant requires ECU reflash - not a straight swap.
- A14NET: 140 hp, specific turbocharger and ECU calibration.
- A14XEL: 120 hp, start-stop system, different ECU and turbo.
- Fitting the wrong variant requires ECU reflash - not a straight swap.
Question 6How long does an A14NET engine typically last-
With meticulous maintenance and early preventative work, these engines can exceed 100,000-120,000 miles. The A14NET is fundamentally robust; the limiting factors are the turbocharger, timing chain, and cooling system plastic components. Turbo health is highly dependent on oil quality and change frequency. Timing chain replacement recommended at 60k-80k miles as preventative. Regular oil changes (5,000-8,000 miles) with Dexos 1-spec oil are essential.
- Turbo health is highly dependent on oil quality and change frequency.
- Timing chain replacement recommended at 60k-80k miles as preventative.
- Regular oil changes (5,000-8,000 miles) with Dexos 1-spec oil are essential.
Compare Vauxhall A14NET Engine Prices Today
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Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
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