Audi A4 Allroad 45 TFSI / TDI Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Audi A4 Allroad 45 TFSI / TDI engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most cost-effective, warranty-backed solution for your vehicle.
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12-Month Warranty
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From £3,200 to £6,000
Used from £800 · Reconditioned from £2,000 · Common codes: CYRB, DKZA, DKNB, CNHA, DEUA, DETA
From £800
Tested, bare/short engine
From £2,000
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Audi A4 Allroad 45 TFSI / TDI Replacement Engineto Finding the Best Audi A4 Allroad 45 TFSI / TDI Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryAudi A4 Allroad 45 TFSI / TDI - Engine History & Specs at a Glance
When the "45" badging was introduced for the A4 Allroad (B9 generation), it signified the high-output 2.0-litre turbocharged petrol (TFSI) and diesel (TDI) variants, replacing the previous numeric horsepower designations. Over its production run, these engines received mild-hybrid integration and emissions refinements while maintaining robust performance.
Variant HistoryAudi A4 Allroad 45 TFSI / TDI - Engine History & Specs at a Glance
When the "45" badging was introduced for the A4 Allroad (B9 generation), it signified the high-output 2.0-litre turbocharged petrol (TFSI) and diesel (TDI) variants, replacing the previous numeric horsepower designations. Over its production run, these engines received mild-hybrid integration and emissions refinements while maintaining robust performance.
Audi A4 Allroad 45 TFSI / TDI
Fuel TypePetrol (TFSI) / Diesel (TDI)
Engine Size Range2.0L
Power Output Range190hp-265hp across the variant's historyEngine History Timeline
B9 generation launch. 45 TFSI introduced with the CYRB (252hp) EA888 Gen 3 engine. 45 TDI introduced with the CNHA (190hp) EA288 engine.
B9.5 facelift. 45 TFSI updated to DKZA/DKNB (245-265hp) with 12V mild-hybrid integration. 45 TDI updated to DEUA/DETA (204hp) with refined AdBlue systems and improved efficiency.
Key Specs Snapshot
Fuel TypePetrol (TFSI) / Diesel (TDI)Engine Size Range2.0LPower Output Range190hp-265hp across the variant's historyYears Produced2016-presentEvery engine fitted to the Audi A4 Allroad 45 TFSI / TDI is covered below, with UK rebuilt pricing and known failure points.
Audi A4 Allroad 45 TFSI / TDI Engine Codes - Specifications & Replacement CostAudi A4 Allroad 45 TFSI / TDI Engine Codes - Specifications & Replacement Cost
2.0L Petrol TFSI (2016-2019)
Power Output252hpYears Fitted2016-2019
Compatible Trim Levels
- 45 TFSI quattro
- 45 TFSI S line
- 45 TFSI Black Edition
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£800-£1,800
Reconditioned
Addressed known issues, tested
£2,000-£3,800
Rebuilt
Full teardown, upgraded internals
£3,200-£5,500
Common Failure
Water pump and thermostat housing failure due to plastic components warping, typically observed between 60,000 and 120,000 miles.
The Audi A4 Allroad 45 TFSI / TDI variants are generally robust, but specific components carry known vulnerabilities. The CYRB (TFSI) and CNHA/DEUA (TDI) codes dominate replacement demand for this variant due to cooling system weaknesses and emissions component failures. Rebuilt engines sourced through EnginesMarket include upgraded components addressing these original failure points, backed by a minimum 12-month unlimited-mileage warranty.
Why the Audi A4 Allroad 45 TFSI / TDI (CYRB) Loses Coolant
Affected Vehicles
Audi A4 Allroad 45 TFSI / TDI (CYRB, DKZA, DKNB, 2016-present)
Typical Failure Mileage
60,000-120,000 miles
Root Cause
Plastic components within the integrated water pump and thermostat housing warp and crack under sustained heat cycles, leading to gradual coolant loss and potential overheating if ignored.
Why It Happens
Plastic components within the integrated water pump and thermostat housing warp and crack under sustained heat cycles, leading to gradual coolant loss and potential overheating if ignored.
Dealer (parts + labour)
£600-£1,000
Specialist (parts + labour)
£400-£800
What it involves
Replacement of water pump and thermostat housing assembly
Suitability
Highly recommended as preventative maintenance at 80k miles
1 - 2 daysDealer (parts + labour)
£4,500-£7,000
Specialist (parts + labour)
£3,200-£5,500
What it involves
Supply & fit, upgraded cooling components addressing the original failure point, 12-month warranty
Suitability
Necessary only if coolant loss has caused catastrophic overheating and cylinder head damage
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 | £600-£1,000 | £400-£800 | Replacement of water pump and thermostat housing assembly | Highly recommended as preventative maintenance at 80k miles | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £4,500-£7,000 | £3,200-£5,500 | Supply & fit, upgraded cooling components addressing the original failure point, 12-month warranty | Necessary only if coolant loss has caused catastrophic overheating and cylinder head damage | 1 - 2 days |
Our Recommendation
Our Recommendation
For the 45 TFSI, preventative replacement of the water pump and thermostat housing is highly advised before catastrophic failure occurs. For the 45 TDI, a reconditioned engine is a strong investment given the high retained value of the Allroad chassis, but ensure the specialist verifies the AdBlue and DPF systems are fully functional to prevent repeat issues.
Don't Let Engine Failure Write Off Your Audi A4 Allroad 45 TFSI / TDI
Navigating an engine failure is stressful, but comparing your options ensures you do not overpay. By sourcing quotes through EnginesMarket, you bypass main dealer premiums and connect directly with specialists who understand the specific quirks of the EA888 Gen 3 and EA288 platforms. Every replacement engine is backed by a minimum 12-month unlimited-mileage warranty and supported by nationwide delivery or supply & fit services.
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 A4 Allroad 45 TFSI / TDI. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
Audi A4 Allroad 45 TFSI / TDI Engine ReplacementFrequently Asked Questions
Question 1How much does an Audi A4 Allroad 45 TFSI / TDI engine replacement cost-
The cost depends on the condition of the replacement unit and the specific engine code. Based on verified market data, used engines typically range from £800 to £2,500, while reconditioned units cost between £2,000 and £4,500.
- Used engines are the most budget-friendly but carry variable mileage.
- Reconditioned engines offer a balance of reliability and cost.
- Rebuilt engines are the most expensive but include comprehensive warranties and upgraded components.
Question 2What are the signs of water pump failure in an Audi A4 Allroad 45 TFSI-
Water pump and thermostat housing failure in the 45 TFSI often presents as a gradual loss of coolant without obvious external leaks, as the plastic housing cracks internally.
- A sweet smell from the engine bay or white smoke from the exhaust.
- The engine temperature gauge rising or warning lights illuminating.
- In severe cases, catastrophic overheating leading to cylinder head damage.
Question 3Is it worth replacing the engine in an Audi A4 Allroad 45 TDI-
Yes, given that B9 and B9.5 Allroad models typically hold a market value of £14,000 to £32,000, a full rebuilt or reconditioned engine replacement is financially viable.
- A reconditioned engine preserves the vehicle's premium utility and resale value.
- Ensure the specialist addresses any underlying AdBlue or DPF issues during installation.
- Always obtain multiple quotes to ensure the repair cost remains proportionate to the vehicle's value.
Question 4How long does an Audi A4 Allroad 45 TFSI / TDI engine replacement take-
A straightforward supply and fit service for this variant typically takes between 2 to 4 working days, depending on the specialist's workload and the complexity of the quattro drivetrain calibration.
- Supply-only orders may take 24-48 hours for nationwide delivery.
- Complex fits requiring additional component replacement (e.g., clutch, dual-mass flywheel) may extend this timeframe.
- Your chosen specialist will provide a precise timeline with your quote.
Question 5Will a replacement engine affect my Audi A4 Allroad's warranty or resale value-
A professionally installed, OEM-spec replacement engine with documented service history and a valid warranty will preserve, and in some cases enhance, your vehicle's resale value.
- Ensure the engine code exactly matches your DVLA record.
- Retain all invoices and the 12-month unlimited-mileage warranty certificate.
- Proper calibration and ECU coding are essential for seamless integration.
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