Audi A6 30 TDI / 45 TDI / 50 TDI Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Audi A6 30 TDI / 45 TDI / 50 TDI engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most cost-effective, reliable solution for your vehicle.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £3,800 to £9,000
Used from £1,200 · Reconditioned from £2,800 · Common codes: DEZF, DDVE, DDVB, DMGA
From £1,200
Tested, bare/short engine
From £2,800
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Audi A6 30 TDI / 45 TDI / 50 TDI specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Audi A6 30 TDI / 45 TDI / 50 TDI Replacement Engineto Finding the Best Audi A6 30 TDI / 45 TDI / 50 TDI Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryAudi A6 30 TDI / 45 TDI / 50 TDI - Engine History & Specs at a Glance
When the 30 TDI, 45 TDI, and 50 TDI badges were introduced for the C8 generation, they signified Audi’s strategic shift towards 48V mild-hybrid (MHEV) diesel technology, offering a refined, efficient, and powerful lineup for the executive saloon and Avant.
Variant HistoryAudi A6 30 TDI / 45 TDI / 50 TDI - Engine History & Specs at a Glance
When the 30 TDI, 45 TDI, and 50 TDI badges were introduced for the C8 generation, they signified Audi’s strategic shift towards 48V mild-hybrid (MHEV) diesel technology, offering a refined, efficient, and powerful lineup for the executive saloon and Avant.
Audi A6 30 TDI / 45 TDI / 50 TDI
Fuel TypeDiesel (Mild Hybrid / MHEV)
Engine Size Range2.0L - 3.0L V6
Power Output Range136hp - 286hpEngine History Timeline
50 TDI (DDVB/DMGA 3.0L V6, 286hp) and 45 TDI (DDVE, 3.0L V6, 231hp) launched with the C8 generation, featuring 48V mild-hybrid systems for improved efficiency and smoother stop-start operation.
30 TDI (DEZF 2.0L inline-4, 136hp) introduced as the entry-level diesel, utilising the EA288 architecture with mild-hybrid assistance to maximise fuel economy for high-mileage drivers.
Key Specs Snapshot
Fuel TypeDiesel (Mild Hybrid / MHEV)Engine Size Range2.0L - 3.0L V6Power Output Range136hp - 286hpYears Produced2018-presentEvery engine fitted to the Audi A6 30 TDI / 45 TDI / 50 TDI is covered below, with UK rebuilt pricing and known failure points.
Audi A6 30 TDI / 45 TDI / 50 TDI Engine Codes - Specifications & Replacement CostAudi A6 30 TDI / 45 TDI / 50 TDI Engine Codes - Specifications & Replacement Cost
2.0L Diesel (2019-present)
Power Output136hpYears Fitted2019-present
Compatible Trim Levels
- 30 TDI
- 30 TDI S line
- 30 TDI Avant
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,200-£2,500
Reconditioned
Addressed known issues, tested
£2,800-£4,500
Rebuilt
Full teardown, upgraded internals
£3,800-£6,000
Common Failure
48V mild-hybrid alternator (belt-driven starter generator) failures and occasional EGR cooler leaks.
The Audi A6 30 TDI / 45 TDI / 50 TDI’s mild-hybrid diesel architecture is generally robust, but high-mileage examples can develop emissions system faults or 48V electrical component failures. Rebuilt engines supplied through EnginesMarket include upgraded components addressing these original failure points, backed by a minimum 12-month unlimited-mileage warranty.
Why the Audi A6 30 TDI / 45 TDI / 50 TDI Loses Coolant or Power
Affected Vehicles
Audi A6 30 TDI / 45 TDI / 50 TDI (DEZF, DDVE, DDVB, 2018-present)
Typical Failure Mileage
60,000-100,000 miles
Root Cause
The belt-driven starter generator (BSG) in the 48V MHEV system can fail, while thermal stress on the EGR cooler can cause internal coolant leaks into the combustion chamber.
Why It Happens
The belt-driven starter generator (BSG) in the 48V MHEV system can fail, while thermal stress on the EGR cooler can cause internal coolant leaks into the combustion chamber.
Dealer (parts + labour)
£800-£1,500
Specialist (parts + labour)
£400-£900
What it involves
BSG replacement or EGR system service
Suitability
Highly effective if caught early before overheating occurs.
1 - 2 daysDealer (parts + labour)
£8,000-£12,000
Specialist (parts + labour)
£6,000-£9,000
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty
Suitability
Necessary if coolant ingress has caused warped cylinder heads or seized components.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor/Preventative Minor | £800-£1,500 | £400-£900 | BSG replacement or EGR system service | Highly effective if caught early before overheating occurs. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £8,000-£12,000 | £6,000-£9,000 | Supply & fit, upgraded components addressing the original failure point, 12-month warranty | Necessary if coolant ingress has caused warped cylinder heads or seized components. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 2018-present Audi A6 30 TDI / 45 TDI / 50 TDI holds a strong market value of £18,000 to £45,000 [THIRD-PARTY]. A £6,000-£9,000 rebuilt engine replacement represents a safe investment ( Safe), comfortably preserving the vehicle's premium residual value.
Our Recommendation
Our Recommendation
Address coolant or electrical warnings immediately. If the engine block is undamaged, a specialist BSG or EGR repair is cost-effective. However, if overheating has caused internal damage, a full rebuilt engine is the only safe long-term solution.
Don't Let Engine Failure Write Off Your Audi A6 30 TDI / 45 TDI / 50 TDI
Navigating premium executive car repairs can be complex, but you do not have to accept main dealer premiums. By comparing quotes through EnginesMarket, you gain access to vetted UK specialists who provide rebuilt Audi A6 30 TDI / 45 TDI / 50 TDI engines with upgraded components, comprehensive 12-month unlimited-mileage warranties, and nationwide supply & fit options.
Compare rebuilt DEZF Audi A6 30 TDI / 45 TDI / 50 TDI engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
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 A6 30 TDI / 45 TDI / 50 TDI. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
Audi A6 30 TDI / 45 TDI / 50 TDI Engine ReplacementFrequently Asked Questions
Question 1How much does an Audi A6 30 TDI / 45 TDI / 50 TDI engine replacement cost-
The cost varies based on the engine's condition and specific code (e.g., DEZF vs DDVB).
- Used engines typically range from £1,200 to £4,500.
- Reconditioned units cost between £2,800 and £7,000.
- Fully rebuilt engines with warranties range from £3,800 to £9,000.
Question 2What are the signs of 48V mild-hybrid or EGR failure in an Audi A6 30 TDI / 45 TDI / 50 TDI-
Electrical and cooling system failures are known vulnerabilities in the C8 MHEV architecture.
- Dashboard warnings for 48V electrical faults or low coolant levels.
- Noticeable loss of power, rough idling, or frequent limp mode activation.
- Sweet-smelling coolant odour or visible puddles under the vehicle.
Question 3Is it worth replacing the engine in a modern Audi A6 30 TDI / 45 TDI / 50 TDI-
Yes, for most owners, due to the vehicle's strong retained value and the high cost of equivalent new models.
- A 2018-present Audi A6 30 TDI / 45 TDI / 50 TDI is typically valued between £18,000 and £45,000.
- A £3,800-£9,000 rebuilt engine represents a safe investment that preserves the car's premium status.
Question 4How long does an Audi A6 30 TDI / 45 TDI / 50 TDI engine replacement take-
A professional supply and fit service is highly efficient, typically completing the entire process within 3 to 5 working days to minimise your downtime.
- The physical removal and installation takes 10 to 16 hours of specialist labour.
- The process includes ECU adaptation, 48V system calibration, and comprehensive road testing.
Question 5What is the difference between the DEZF, DDVE, and DDVB engine codes in the Audi A6 30 TDI / 45 TDI / 50 TDI-
They represent different power outputs and architectures within the C8 diesel lineup.
- DEZF is a 2.0L inline-4 (136hp) designed for maximum efficiency in the 30 TDI.
- DDVE is a 3.0L V6 (231hp) offering a balance of performance and refinement for the 45 TDI.
- DDVB/DMGA is a high-output 3.0L V6 (286hp) delivering premium performance for the 50 TDI.
Why Choose UsCompare Audi A6 30 TDI / 45 TDI / 50 TDIEngine PricesToday
Hundreds of Audi A6 30 TDI / 45 TDI / 50 TDI engines supplied through our network
12-Month Warranty on every rebuilt Audi A6 30 TDI / 45 TDI / 50 TDI engine
Nationwide UK delivery
supply & fit available
Do not overpay for your Audi A6 30 TDI / 45 TDI / 50 TDI engine replacement. Our free, no-obligation comparison tool connects you directly with vetted UK specialists. Whether you need a budget-friendly used unit or a fully rebuilt engine with a comprehensive warranty, we ensure you get the best price for your exact DEZF, DDVE, or DDVB engine code, without the main dealer markup.
Enter your registration
and get matched with verified Audi A6 30 TDI / 45 TDI / 50 TDI specialists.