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Audi A8 Engine ReplacementCompare Prices & Save
Get quotes today from trusted UK Audi A8 engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available nationwide.
A8 3.0 TDI Engines - from £1,800 to £5,500
-> Rebuilt units from £2,200 · Common codes: CCWA, CDYA, CGQB, CRCA
A8 3.0 TFSI Engines - from £1,600 to £4,800
-> Rebuilt units from £2,000 · Common codes: CGWB, CREC, CYGA, DBZA
A8 Performance Engines - from £3,500 to £15,000
-> Rebuilt units from £4,500 · Common codes: CDTA, CTWA, CTWB, CVPA
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3 Simple Stepsto Finding the Best Audi A8 Replacement Engine
Get Instant Quotes from Audi Engine Specialists Across the UK - 100% free, no obligation. Most replacements completed within 3-5 days.
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Live UK Engine Market Data
What Are UK Drivers Paying for Audi A8 Engine Replacement?
The table below shows typical UK rebuilt engine replacement costs across different Audi A8 variants - compare failure causes, engine codes, fuel types, and price ranges to see what UK drivers are paying.
Average Market Prices
- Audi A8 (D4) 4.0 TDI2012-2017£1,800-£3,200Turbocharger failureCDTADiesel 4.0L
- Audi A8 (D4) 3.0 TDI2014-2017£1,400-£2,500EGR cooler failureCGQBDiesel 3.0L
- Audi A8 (D4) S8 4.0 TFSI2012-2017£2,200-£4,000Turbo oil seal leakCTWAPetrol 4.0L
- Audi A8 (D5) 3.0 TDI2017-2022£1,500-£2,700DPF cloggingDAZADiesel 3.0L
- Audi A8 (D3) 3.0 TDI2003-2010£1,200-£2,200Timing chain stretchCCWADiesel 3.0L
- Audi A8 (D4) 3.0 TDI2010-2014£1,300-£2,400Timing chain tensionerCDYADiesel 3.0L
- Audi A8 (D4) 3.0 TFSI2010-2014£1,200-£2,200Carbon buildup valvesCGWBPetrol 3.0L
- Audi A8 (D4) 4.2 FSI2010-2014£1,500-£2,800Oil consumption ringsBVNPetrol 4.2L
Last updated: 22 May, 14:59
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Models We Cover
Audi A8 Engine ReplacementAll Variants Covered
From the efficient 3.0 TDI to the high‑performance S8 Plus, our network of UK Audi A8 engine specialists helps you compare rebuilt, reconditioned and used engine prices. A typical rebuilt unit comes with a 12‑month warranty, with supply & fit available nationwide.
Performance Range
Specs204-286hp
Years2003-2017
Rebuilt£1,350-£2,500
Variant Directory
All Audi A8 Variants - Engine Replacement Coverage
Diesel Variants
A8 3.0 TDIA8 3.0 TDI quattroA8 3.0 TDI UltraA8 4.0 TDIA8 4.0 TDI quattro
Petrol Variants
A8 3.0 TFSIA8 3.0 TFSI quattroA8 4.2 FSIA8 4.2 FSI quattroA8 L 4.2 FSIA8 L W12Performance & Hybrid VariantsS8S8 PlusS8 quattroA8 60 TFSI eA8 L 60 TFSI eA8 3.0 TDI mild hybridNot sure which variant your Audi A8 is? Enter your registration number above - we’ll identify the exact sub‑model, engine code and compatible replacement options instantly.
Engine Codes
Audi A8 Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Audi A8 across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Diesel Engines
Extracted from detailed diesel engine families across Audi A8 variants.
Petrol Engines
Extracted from detailed petrol and performance engine families across Audi A8 variants.
Hybrid / Electrified Engines
Extracted from electrified powertrains and hybrid engine families used in Audi A8 variants.
Can't find your engine code?
Common Problems
Audi A8 Engine Problems
What It Costs to Fix & When Replacement Makes Sense
Every rebuilt engine includes a minimum 12-month unlimited mileage warranty.
1. Timing Chain Tensioner Failure
Why 3.0 TDI Engines Fail Prematurely
Affected Models
Audi A8 3.0 TDI (2003-2014, CCWA, CDYA, CEJA engine codes)
Typical Failure Mileage
80,000 - 120,000 miles
Root Cause
The timing chain is mounted at the rear of the engine, requiring engine-out access for replacement. Tensioner guides become brittle with age and heat cycling, eventually cracking and allowing chain slack - leading to catastrophic valve and piston contact if not caught early.
Repair Options & Estimated Costs (UK ranges)
| Repair Tier | Dealer Price | Specialist Price | What It Involves | Longevity / Suitability |
|---|---|---|---|---|
Preventative Timing Chain Replacement - Replace chains/tensioners before failure Minor | £3,500 - £5,000 | £1,800 - £2,800 | Full engine-out replacement of timing chains, tensioners, guides, plus water pump and thermostat | 80k-100k mile lifespan; viable only if caught before chain jumps |
Full Replacement - Rebuilt Engine - Post-failure solution Best Value | £9,000 - £13,000 | £4,500 - £6,500 | Supply and fit of reconditioned engine with upgraded timing components, fully bench tested | 12-month warranty; upgraded components address original weakness |
Our Recommendation
Best next step for timing chain tensioner failure
On an A8 3.0 TDI worth £4,000-£8,000, preventative chain replacement at a specialist makes sense if the car is otherwise sound and you caught the warning signs (rattle on cold start, particularly from the rear of the engine). However, once the chain has slipped or the engine has gone into catastrophic failure, replacement with a reconditioned unit fitted by a specialist is usually better value than a dealer repair - you get upgraded components and a warranty for less than the dealer's repair quote alone.
Don't Let Engine Failure Write Off Your Audi A8
Whether you're facing timing chain failure on a 3.0 TDI, carbon buildup on a TFSI petrol, or turbo failure on a high-mileage diesel, the decision between repair and replacement comes down to honest maths - and EnginesMarket makes it simple to compare prices from trusted UK Audi A8 specialists. Every reconditioned engine supplied through our network includes upgraded internal components designed to address the original failure point, a minimum 12-month unlimited mileage warranty, and nationwide delivery or supply-and-fit options. Compare prices today and get your A8 back on the road without the main dealer premium.
Compare Audi A8 Engine Replacement Prices Now →Audi A8 Engine Problems
What It Costs to Fix & When Replacement Makes Sense
Affected Models
Audi A8 3.0 TDI (2003-2014, CCWA, CDYA, CEJA engine codes)
Typical Failure Mileage
80,000 - 120,000 miles
Root Cause
The timing chain is mounted at the rear of the engine, requiring engine-out access for replacement. Tensioner guides become brittle with age and heat cycling, eventually cracking and allowing chain slack - leading to catastrophic valve and piston contact if not caught early.
Preventative Timing Chain Replacement - Replace chains/tensioners before failure
Dealer
£3,500 - £5,000
Specialist
£1,800 - £2,800
Full engine-out replacement of timing chains, tensioners, guides, plus water pump and thermostat
80k-100k mile lifespan; viable only if caught before chain jumps
Full Replacement - Rebuilt Engine - Post-failure solution
Dealer
£9,000 - £13,000
Specialist
£4,500 - £6,500
Supply and fit of reconditioned engine with upgraded timing components, fully bench tested
12-month warranty; upgraded components address original weakness
Our Recommendation
Best next step for timing chain tensioner failure
On an A8 3.0 TDI worth £4,000-£8,000, preventative chain replacement at a specialist makes sense if the car is otherwise sound and you caught the warning signs (rattle on cold start, particularly from the rear of the engine). However, once the chain has slipped or the engine has gone into catastrophic failure, replacement with a reconditioned unit fitted by a specialist is usually better value than a dealer repair - you get upgraded components and a warranty for less than the dealer's repair quote alone.
Don't Let Engine Failure Write Off Your Audi A8
Whether you're facing timing chain failure on a 3.0 TDI, carbon buildup on a TFSI petrol, or turbo failure on a high-mileage diesel, the decision between repair and replacement comes down to honest maths - and EnginesMarket makes it simple to compare prices from trusted UK Audi A8 specialists. Every reconditioned engine supplied through our network includes upgraded internal components designed to address the original failure point, a minimum 12-month unlimited mileage warranty, and nationwide delivery or supply-and-fit options. Compare prices today and get your A8 back on the road without the main dealer premium.
Compare Audi A8 Engine Replacement Prices Now →Disclaimer: All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Audi A8 and engine code. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
12-Month Warranty
Upgraded Components
Nationwide UK Delivery
Save vs Main Dealer Price
Replacement Engine Options
Audi A8 Engine TypesOptions, Costs & What to Expect
Every engine type for the Audi A8 is available through our UK network, with typical price ranges varying by variant, engine code and your specific budget.
All engine types include a minimum 12‑month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Audi A8 within hours.
Engine Sizes
Audi A8 Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the Audi A8 across all generations is listed below, with compatible engine codes, years and common failure notes to help you identify your exact unit.
Audi A8 Diesel Engine Sizes
The 3.0 V6 TDI has been the backbone of the Audi A8 diesel range across three generations - D3 (2003-2010), D4 (2010-2017) and early D5 (2017-2022). Multiple power outputs from 204hp to 286hp were offered, with CCWA, CDYA and CGQB codes dominating UK replacement demand. Rear-mounted timing chain tensioner failure remains the most discussed issue among owners, particularly on pre-2014 units.
| Engine Code(s) | CCWA, CDYA, CEJA, CGQB, CRCA, CMHA, CPNA, CWUB, DAZA |
| Compatible Models (UK) | A8 3.0 TDI (D3 2003-2010), A8 3.0 TDI (D4 2010-2017), A8 50 TDI |
| Production Years | D5 2017-2022 |
Common Failure Points
Watch for these known weak points
Timing chain tensioner wear (80k-120k miles), EGR cooler leakage, DPF clogging on short trips
Not sure which engine size your Audi A8 needs? Enter your registration number above - we’ll identify the exact displacement, engine code and compatible replacement options instantly. All engines supplied through EngineMarket include a minimum 12‑month unlimited mileage warranty from UK Audi A8 specialists.
Audi A8 Engines Fuel Type
Audi A8 Engines by Fuel Type
Choose your Audi A8 engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the early D3 3.0 TDI to the latest D5 60 TFSI e plug-in hybrid.
Audi A8 Diesel Engines
Audi A8 Diesel Engines
The 3.0 V6 TDI dominated A8 diesel production across three generations (D3, D4, D5), with the 4.0 V8 TDI offered as a premium torque-rich alternative.
Common Engine Families
CCWA/CDYA - first and second-gen 3.0 TDI (204-245hp), timing chain tensioner vulnerability
CGQB/CRCA - late D4 3.0 TDI (258-286hp), turbo and EGR cooler concerns
CDTA - 4.0 V8 twin-turbo TDI (320-350hp), complex oil-fed turbo system
DAZA/DDV - D5 3.0 TDI (286hp), mild hybrid 48V system added
Found In
D3 A8 (2003-2010) - 3.0 TDI (CCWA)
D4 A8 (2010-2017) - 3.0 TDI (CDYA, CGQB, CRCA), 4.0 TDI (CDTA)
D5 A8 (2017-2022) - 50 TDI 3.0 (DAZA, DDV)
Known For
Strong motorway economy - 40+ mpg achievable on 3.0 TDI
Timing chain tensioner failure on rear-mounted chains (80k-120k miles)
EGR cooler leaks and DPF clogging on short-trip urban cars
High UK replacement demand - 3.0 TDI accounts for over 60% of A8 engine enquiries
Typical Models (UK)
A8 3.0 TDI (204hp, 245hp, 258hp, 286hp)
A8 4.0 TDI (320hp, 350hp)
A8 50 TDI (D5 generation)
Not sure which fuel type your Audi A8 has? Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12‑month unlimited mileage warranty from UK Audi A8 specialists.
Engine Years
Audi A8 Engines by YearWhat Was Fitted & When
From the 1994 D2 launch to the current D5 generation, this timeline covers every major engine change across the Audi A8's production history, helping you identify your exact unit and compare rebuilt engine prices from UK specialists.
1994-1996 - D2 Launch Generation
Major Platform Change
The original aluminium-bodied A8 launched with conventional V6 and V8 petrol engines - robust units that routinely reached 300,000-400,000km with proper maintenance .
Key Changes
All-aluminium Audi Space Frame (ASF) technology debuts
Quattro all-wheel drive standard on V8 models, optional on V6
2.8 V6 (174hp) and 4.2 V8 (300hp) launch powertrains
No diesel options in early D2 production
Known For
Legendary ASF aluminium construction reduces weight significantly
4.2 V8 is exceptionally robust - easily exceeds 200k miles with care
Conventional port injection avoids carbon buildup issues
Suspension wear and electrical gremlins more common than engine failure
Main Engines
AAH/ACK - 2.8L V6 petrol (base model)
AEW - 3.7L V8 petrol (230hp)
ABZ - 4.2L V8 petrol (300hp)
Popular Models
Audi A8 2.8
Audi A8 3.7
Audi A8 4.2
Engine Codes Covered
AAHACKAEWABZ
Common Replacement Enquiries
Get quotes for 1994-1996 Audi A8 replacement engines
1994-1996 - D2 Launch Generation
Major Platform Change
The original aluminium-bodied A8 launched with conventional V6 and V8 petrol engines - robust units that routinely reached 300,000-400,000km with proper maintenance .
Key Changes
All-aluminium Audi Space Frame (ASF) technology debuts
Quattro all-wheel drive standard on V8 models, optional on V6
2.8 V6 (174hp) and 4.2 V8 (300hp) launch powertrains
No diesel options in early D2 production
Known For
Legendary ASF aluminium construction reduces weight significantly
4.2 V8 is exceptionally robust - easily exceeds 200k miles with care
Conventional port injection avoids carbon buildup issues
Suspension wear and electrical gremlins more common than engine failure
Main Engines
AAH/ACK - 2.8L V6 petrol (base model)
AEW - 3.7L V8 petrol (230hp)
ABZ - 4.2L V8 petrol (300hp)
Engine Codes Covered
AAHACKAEWABZ
Popular Models
Audi A8 2.8
Audi A8 3.7
Audi A8 4.2
Common Replacement Enquiries
Get quotes for 1994-1996 Audi A8 replacement engines
Year Finder
Not sure which year your Audi A8 was built?
Not sure which year your Audi A8 was built? Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12‑month warranty from UK Audi A8 specialists.
FAQ
Audi A8 Engine ReplacementFrequently Asked Questions
Question 1
Is the 3.0 TDI in the Audi A8 prone to timing chain failure?
Yes, early 3.0 TDI units (2003-2014) have rear-mounted timing chain tensioner issues, typically failing between 60k-120k miles. Late 2014-onwards units are more reliable.
Key points
- • Chain tensioner guide breaks, causing chain slack and potential valve/piston contact
- • Failure often occurs without warning - engine-out replacement is required
- • Low-mileage failures reported (some as early as 40k miles)
- • Pre-2014 CCWA and CDYA codes are highest risk
- • Preventative replacement at specialist costs £1,800-£2,800
Question 2
How much does an Audi A8 engine replacement cost in the UK?
Expect £1,350-£2,800 for a reconditioned 3.0 TDI supply-only, or £4,500-£6,500 supply and fit. Dealership replacement can exceed £9,000-£13,000 for the same work.
Key points
- • Used 3.0 TDI engines: £900-£2,500 depending on mileage and history
- • Rebuilt/reconditioned: £1,350-£2,800 with 12-month warranty
- • 4.0 V8 and W12 units cost significantly more (£2,800-£5,800+)
- • Specialist fitting adds £600-£1,200 to engine price
- • One owner saved over £8,000 by choosing reconditioned over dealer new
Question 3
Which Audi A8 engine is the most reliable?
The late-production 3.0 TDI (CGQB, 2014-2017) is the most reliable diesel option. For petrol, the supercharged 3.0 TFSI (CREC, 2014-2017) is solid if carbon-cleaned regularly.
Key points
- • 2014-2017 3.0 TDI has most timing chain issues resolved
- • Late 3.0 TFSI gained dual injection to reduce carbon buildup
- • 4.2 TDI V8 (CDTE, 385hp) is remarkably robust - many exceed 250k miles
- • Avoid early 4.2 FSI (pre-2010) due to oil consumption issues
- • What Car? recommends 50 TDI as the best all-rounder
Question 4
What causes the 4.0 TFSI V8 in the S8 to fail catastrophically?
Oil screen blockages in turbo feed lines starve the turbos of oil, leading to complete turbo failure. Once debris enters the oil system, the engine is often beyond repair.
Key points
- • Screen clogs with coked oil between 60k-100k miles
- • One owner reported $53,800 (£43k+) repair cost under warranty
- • Failure can occur without warning - no dashboard light beforehand
- • Specialist replacement with upgraded oiling system is essential
- • Affects CTWA, CTWB, CVPA, CVPC codes in D4 and D5 S8 models
Question 5
Does the Audi A8 3.0 TFSI suffer from carbon buildup?
Yes. Direct-injection 3.0 TFSI engines (CGWB 2010-2014) build carbon on intake valves every 50k-80k miles, causing rough idle, misfires and reduced power.
Key points
- • Symptoms include cold-start hesitation and loss of low-end torque
- • Walnut blasting at specialist costs £400-£650, dealer £800-£1,200
- • Late 2014-2017 CREC engine gained dual injection - less prone
- • D5 55 TFSI (CYGA/DBZA) mild hybrid also affected but less severe
- • Regular high-quality oil changes help slow buildup rate
Question 6
Should I repair or replace my Audi A8 engine after catastrophic failure?
Replace with a reconditioned unit. Once a 3.0 TDI has jumped timing or a 4.0 V8 has suffered turbo failure, repair costs often approach or exceed replacement - without warranty coverage.
Key points
- • Reconditioned engine includes upgraded components addressing original failure
- • 12-month unlimited mileage warranty included with replacement
- • Dealer engine-out chain repair on 3.0 TDI: £3,500-£5,000 for partial fix
- • Reconditioned engine supply and fit: £4,500-£6,500 with full warranty
- • One owner paid £2,200 for a full engine rebuild rather than chasing individual failures
Question 7
Is the Audi A8 4.2 FSI known for oil consumption problems?
Yes. The 4.2 FSI V8 (BVN code, 2006-2010) suffers from piston ring wear, consuming 1 litre per 600-1,000 miles at higher mileages - a full rebuild is the only permanent fix.
Key points
- • Problem affects D3 generation 4.2 FSI from 2006-2010
- • Oil consumption typically begins around 70k-100k miles
- • Piston ring replacement at specialist costs £2,800-£4,200
- • Reconditioned engine with upgraded rings costs £4,500-£6,500
- • Early detection via frequent oil checks prevents secondary damage
Question 8
How long do Audi A8 engines last?
Well-maintained 3.0 TDI diesels regularly exceed 200k-250k miles. The 4.2 TDI V8 can reach 250k+ miles. Petrol 3.0 TFSI units typically last 150k-200k miles with proper carbon cleaning.
Key points
- • 3.0 TDI with preventative timing chain work: 250k+ miles achievable
- • 4.2 TDI V8 (CDTA/CDTE) is the most durable - documented 300k miles
- • 3.0 TFSI lifespan limited by carbon buildup - regular cleaning extends life
- • EA837 petrol V6 can last 190k+ miles with proper maintenance
- • Average lifespan quoted at ~300,000 km (186,000 miles) for 4.0 V8
Question 9
Is it worth replacing the engine in a high-mileage Audi A8?
Yes - if the car is otherwise sound. D3 and early D4 A8s with good bodywork, suspension and interior are worth £4,000-£8,000 - a £4,500-£6,500 reconditioned engine makes financial sense.
Key points
- • Factor current vehicle value against £4,500-£6,500 replacement cost
- • One owner spent £5,600 total on full A8 restoration including engine
- • Reconditioned engine includes warranty - unlike used or repair
- • D4 facelift (2014-2017) models hold value particularly well
- • Compare to new car cost - £4,500-£6,500 is 10-20% of new A8 price
Question 10
What are common DPF and EGR problems on Audi A8 diesels?
3.0 TDI diesels (especially 2010-2017) suffer EGR cooler leaks and DPF clogging from short trips. EGR replacement costs £450-£800 at specialists; DPF issues often require forced regeneration.
Key points
- • EGR cooler leaks coolant internally - white smoke and coolant loss symptoms
- • DPF clogs on urban-driven cars where regeneration cycles can't complete
- • Combined EGR/DPF failure repair approaches £1,500-£2,000
- • Reconditioned engine with new emissions components costs £4,200-£6,000
- • Regular longer journeys help DPF self-clean - avoid short trips only
Why Choose Us
Why UK Audi A8 Owners Trust EngineMarket
Join thousands of UK drivers who compare Audi A8 engine prices through our network of trusted specialists - every rebuilt and reconditioned unit backed by a minimum 12‑month unlimited mileage warranty and nationwide delivery.
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