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Audi CJSA Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The 1.4-litre TFSI EA111 single-turbo petrol engine fitted to the Audi A3 and A1 from 2012 to 2016. Reconditioned Audi CJSA units are available from £2,000 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£800
Reconditioned from
£2,000
Rebuilt from
£3,000
GB
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Key Specs
Audi CJSA - Specifications at a Glance
Engine Code
CJSA
Fuel
Petrol
Configuration
1.4L inline-4, single turbo, direct injection (EA111)
Power Output(s)
122hp
Years Produced
2012-2016
UK Models Fitted
2 Audi models - full list in Compatibility below
Replaced
CAXA (EA111 1.4 TFSI 122hp, earlier generation)
Replaced By
CZDA (EA211 1.4 TSI, belt-driven)
Most Common Failure
Timing chain tensioner failure and carbon buildup
Reconditioned Price Range
£2,000-£3,500 supply-only
Vetted UK specialists for CJSA replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Audi Models Use the CJSA-
The CJSA is the 122hp single-turbo EA111 1.4 TFSI engine, fitted to Audi's compact models during the early-to-mid 2010s before the EA211 belt-driven family replaced it.
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Audi A1
CROSS-BRAND
CJSA is documented across 2 BMW applications spanning Audi A3, Audi A1. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Audi CJSA Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £800-£1,800 | £1,255-£2,450 | 3-6 months |
Reconditioned | £2,000-£3,500 | £2,455-£4,150 | 12-24 months |
Rebuilt | £3,000-£4,500 | £3,455-£5,150 | 12-24 months |
The final cost of an Audi CJSA engine replacement depends heavily on whether the timing chain and tensioner have already been replaced with the updated revision, and whether the turbocharger has been refurbished. Units with documented chain replacement and clean intake valves command a premium but carry far less immediate risk. For a detailed breakdown of how these components affect your final invoice, see our full reconditioned engine cost guide.
Labour Guide
Fitting an Audi CJSA typically takes 7-10 hours at £65/hr (independent) - confirm exact labour when comparing quotes .
Price Factors
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Common Problems
Audi CJSA Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the CJSA, based on real-world data and verified failure patterns.
Verified issue focus: Timing chain tensioner failure and carbon buildup.
1. Timing Chain Tensioner Failure - 2012-2016 models
1. Timing Chain Tensioner Failure - 2012-2016 models
Typical onset:
60k-100k miles
What happens:
The EA111 1.4 TFSI uses a timing chain driven by a hydraulic tensioner that is prone to premature wear. As the tensioner loses pressure, the chain stretches and begins to rattle on cold starts. If left unaddressed, the chain can skip a tooth, causing the pistons to contact the valves and resulting in catastrophic internal damage.
Repair vs replace:
A standalone timing chain and tensioner kit replacement costs approximately £800-£1,500 and is viable if caught early. If the chain has already jumped or bent valves, a full Audi CJSA engine replacement is the only reliable solution. Read our full timing chain failure guide.
Read more about this issue
2. Carbon Buildup on Intake Valves - All CJSA variants
2. Carbon Buildup on Intake Valves - All CJSA variants
Typical onset:
60k-100k miles
What happens:
As a direct-injection engine, the CJSA has no fuel washing over the intake valves. Over time, carbon deposits accumulate on the valve stems and ports, restricting airflow. Symptoms include rough idle, hesitation under acceleration, and gradual power loss.
Repair vs replace:
A walnut blast or chemical intake clean resolves this without engine removal. It does not warrant a full CJSA replacement unless accompanied by valve seat damage from prolonged neglect. Read our full carbon buildup guide.
Read more about this issue
The CJSA was produced throughout the EA111 lifecycle. Post-2016, Audi transitioned to the EA211 belt-driven family (CZDA), which eliminated the timing chain issue entirely. If your CJSA has already had the chain and tensioner replaced with the updated parts, the engine is significantly more reliable going forward .
Compare rebuilt CJSA prices with the failure already addressed
Engine Variants
How to Confirm You Have the CJSA
The Audi CJSA engine code is stamped directly onto the engine block, typically on a machined pad near the junction of the engine and the transmission bell housing. It is also clearly listed on your V5C registration document under "Engine Number" and can be decoded from your 17-digit VIN.
Not sure which engine your car has- Enter your registration above - we'll confirm your exact CJSA fitment before any quotes are sent.
Easily Confused
CAXA
- The earlier EA111 1.4 TFSI 122hp variant that the CJSA directly succeeded, sharing the same chain-driven architecture and similar coking vulnerabilities.
Alternative / Next-Gen Code
CZDA
- The EA211 1.4 TSI that replaced the CJSA, featuring a belt-driven timing system that entirely eliminated the notorious chain tensioner failure risk of the EA111 generation.
Related JLR Variants
Volkswagen EA111 1.4 TSI
The identical physical engine architecture fitted to contemporary Volkswagen Golf and Polo models, sharing the exact same timing chain and carbon buildup failure patterns.
Confirm the exact CJSA fitment
Not sure which engine your car has- Enter your registration above - we'll confirm your exact CJSA fitment before any quotes are sent.
Buying Guide
Buying a Replacement Audi CJSA - 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 Audi CJSA engine is a viable option only if it comes with verifiable proof that the timing chain and tensioner have already been replaced with the updated revision. Without this documentation, you risk inheriting a stretched chain that could fail within thousands of miles of installation. Explore vetted options via our used engines network.
Reconditioned:
A properly reconditioned CJSA is the recommended choice for most owners. A reputable rebuild will include a new timing chain kit with the revised tensioner, walnut-blasted intake valves, and a verified turbocharger, directly addressing the EA111's known weak points and restoring the engine to reliable operation. Compare reconditioned engines today.
Rebuilt:
A full rebuild is justified for CJSA units that have suffered secondary damage, such as a jumped timing chain bending valves or scoring cylinder walls. An upgraded rebuild should include new piston rings, a skimmed cylinder head, and the updated chain tensioner to prevent recurrence. Learn more about rebuilt engines.
Supply & Fit Line:
Opting for a supply-and-fit service through our network ensures the replacement is performed by Audi specialists, with the warranty backed by the installing garage for complete peace of mind. View our supply and fit options.
Vehicle Value Note:
The CJSA is typically found in Audi A3 (8V) and A1 (8X) models valued between £4,000 and £12,000 . For most examples, a reconditioned engine at £2,000+ remains well within the vehicle's value. However, for sub-£4,000 A1s with high mileage, the replacement cost may approach 50% or more of the vehicle's current market value - evaluate carefully before committing.
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Related Engines
Engines Related to the Audi CJSA
Explore engines that are closely related to the Audi CJSA, including its predecessor, successor, and key family variants.
Predecessor
CAXA
- The earlier EA111 1.4 TFSI 122hp variant that the CJSA directly succeeded, sharing the same chain-driven architecture and similar coking vulnerabilities.
Successor
CZDA
- The EA211 1.4 TSI that replaced the CJSA, featuring a belt-driven timing system that entirely eliminated the notorious chain tensioner failure risk of the EA111 generation.
Cross-Brand Twin
Volkswagen EA111 1.4 TSI
The identical physical engine architecture fitted to contemporary Volkswagen Golf and Polo models, sharing the exact same timing chain and carbon buildup failure patterns.
FAQ
Audi CJSAFrequently Asked Questions
Question 1How much does an Audi CJSA engine replacement cost-
A reconditioned Audi CJSA engine typically costs between £2,000 and £3,500 for supply-only . Used units start around £800 but carry high risks of undocumented timing chain wear. Fully rebuilt options range from £3,000 to £4,500. Independent fitting labour adds approximately £455-£650 to the total.
- Used units start around £800 but carry high risks of undocumented timing chain wear.
- Fully rebuilt options range from £3,000 to £4,500.
- Independent fitting labour adds approximately £455-£650 to the total.
Question 2What is the most common failure with the CJSA engine-
The most frequent documented issue with the Audi CJSA is timing chain tensioner failure, often accompanied by carbon buildup on the intake valves. The hydraulic tensioner can lose pressure, leading to chain stretch and a distinct cold-start rattle. If ignored, the chain can skip a tooth, causing catastrophic valve-to-piston contact.
- The hydraulic tensioner can lose pressure, leading to chain stretch and a distinct cold-start rattle.
- If ignored, the chain can skip a tooth, causing catastrophic valve-to-piston contact.
Question 3Which Audi models use the CJSA engine code-
The CJSA is fitted to mainstream Audi compact models from 2012 to 2016, most notably the A3 (8V) and A1 (8X). It was a high-volume application before Audi transitioned to the belt-driven EA211 engine family. Always verify your specific fitment using your registration number before ordering parts.
- It was a high-volume application before Audi transitioned to the belt-driven EA211 engine family.
- Always verify your specific fitment using your registration number before ordering parts.
Question 4Should I buy a used or reconditioned CJSA engine-
A reconditioned Audi CJSA is strongly recommended over a used unit due to the known risks of inheriting a stretched timing chain. Used engines carry a 3-6 month warranty and may have undocumented tensioner wear. Reconditioned units include a revised timing chain kit with the updated tensioner and a 12-24 month warranty.
- Used engines carry a 3-6 month warranty and may have undocumented tensioner wear.
- Reconditioned units include a revised timing chain kit with the updated tensioner and a 12-24 month warranty.
Question 5How do I know if my car has the CJSA engine-
The CJSA engine code is stamped on a machined pad on the engine block, near the transmission bell housing, and is listed on your V5C registration document. It is commonly confused with the earlier CAXA or the later belt-driven CZDA variants. Fitting the wrong revision can cause ECU mapping mismatches and wiring loom incompatibilities.
- It is commonly confused with the earlier CAXA or the later belt-driven CZDA variants.
- Fitting the wrong revision can cause ECU mapping mismatches and wiring loom incompatibilities.
Compare Audi CJSA Engine Prices Today
Vetted UK specialists who work on the Audi EA111 petrol family every week Minimum 12-month warranty on every reconditioned and rebuilt CJSA Nationwide delivery - supply-only or full supply & fit Get a free, no-obligation comparison for your exact Audi CJSA engine. Our registration lookup confirms your precise fitment before any quotes are sent, ensuring you receive accurate pricing from vetted specialists. With reconditioned CJSA units starting from £2,000, comparing takes two minutes and could save you hundreds on your replacement.
Vetted UK Specialists
Vetted UK specialists for CJSA 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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