Audi A4 40 TDI Quattro Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Audi A4 40 TDI Quattro engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the best supply and fit solution for your vehicle.
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From £3,800 to £6,000 [EM-QUOTE]
Used from £1,200 · Reconditioned from £2,800 · Common codes: DET, DESA, DETA, DTPA, DTUA
From £1,200
Tested, bare/short engine
From £2,800
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 40 TDI Quattro Replacement Engineto Finding the Best Audi A4 40 TDI Quattro Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryAudi A4 40 TDI Quattro - Engine History & Specs at a Glance
Launched as the core diesel performance variant of the B9 generation, the 40 TDI Quattro badge signifies a 2.0-litre turbocharged diesel with all-wheel drive, evolving from the 190hp EA288 unit to the 204hp mild-hybrid iteration in the B9.5 facelift.
Variant HistoryAudi A4 40 TDI Quattro - Engine History & Specs at a Glance
Launched as the core diesel performance variant of the B9 generation, the 40 TDI Quattro badge signifies a 2.0-litre turbocharged diesel with all-wheel drive, evolving from the 190hp EA288 unit to the 204hp mild-hybrid iteration in the B9.5 facelift.
Audi A4 40 TDI Quattro
Fuel TypeDiesel (Mild-Hybrid from 2020)
Engine Size Range2.0L
Power Output Range190-204hpEngine History Timeline
DET / DESA / DETA 2.0L TDI, 190hp (140kW). Introduced with the B9 generation, replacing older numerical badging with the new "40 TDI" nomenclature, paired with a 7-speed S tronic and Quattro all-wheel drive.
DTPA / DTUA 2.0L TDI Mild Hybrid, 204hp (150kW). Launched with the B9.5 facelift, featuring updated EA288 Evo architecture with a 12V mild-hybrid system for improved efficiency and increased power output.
Key Specs Snapshot
Fuel TypeDiesel (Mild-Hybrid from 2020)Engine Size Range2.0LPower Output Range190-204hpYears Produced2015-presentEvery engine fitted to the Audi A4 40 TDI Quattro is covered below, with UK rebuilt pricing and known failure points.
Audi A4 40 TDI Quattro Engine Codes - Specifications & Replacement CostAudi A4 40 TDI Quattro Engine Codes - Specifications & Replacement Cost
2.0L Diesel (2015-2020)
Power Output190hp (140kW)Years Fitted2015-2020
Compatible Trim Levels
- 40 TDI Quattro Sport
- 40 TDI Quattro S line
- 40 TDI Quattro Black Edition
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
AdBlue system issues (NOx sensors, heater) and occasional EGR cooler leaks, typically emerging between 100k-180k miles.
The Audi A4 40 TDI Quattro is generally robust, with the EA288 2.0 TDI family proving significantly more reliable than its EA189 predecessor. However, emissions control components and high-mileage wear can lead to costly repairs. Rebuilt engines through EnginesMarket include upgraded components addressing original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the Audi A4 40 TDI Quattro (DET/DTPA) Triggers Warning Lights
Affected Vehicles
Audi A4 40 TDI Quattro (DET, DTPA, DTUA, 2015-present)
Typical Failure Mileage
100k-180k miles
Root Cause
The AdBlue heater element or NOx sensors can fail, while the EGR cooler is susceptible to internal leaks, triggering engine management lights and potential limp mode.
Why It Happens
The AdBlue heater element or NOx sensors can fail, while the EGR cooler is susceptible to internal leaks, triggering engine management lights and potential limp mode.
Dealer (parts + labour)
£1,200-£2,200
Specialist (parts + labour)
£600-£1,200
What it involves
Replacement of faulty NOx sensor, AdBlue heater, or EGR cooler flush/replace.
Suitability
Viable if the core engine block and turbo are healthy.
1 - 2 daysDealer (parts + labour)
£5,500-£7,500
Specialist (parts + labour)
£4,300-£6,700
What it involves
Supply & fit of reconditioned/rebuilt EA288 2.0 TDI, upgraded components, 12-month warranty.
Suitability
The right call if multiple emissions components fail alongside high-mileage wear.
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 |
|---|---|---|---|---|---|
 Component Repair (AdBlue/EGR) Minor | £1,200-£2,200 | £600-£1,200 | Replacement of faulty NOx sensor, AdBlue heater, or EGR cooler flush/replace. | Viable if the core engine block and turbo are healthy. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £5,500-£7,500 | £4,300-£6,700 | Supply & fit of reconditioned/rebuilt EA288 2.0 TDI, upgraded components, 12-month warranty. | The right call if multiple emissions components fail alongside high-mileage wear. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 2015-2020 Audi A4 40 TDI Quattro is valued at approximately £8,000-£16,000, while 2020+ B9.5 models sit around £16,000-£25,000 [THIRD-PARTY]. For vehicles worth £8,000-£15,000+, a reconditioned or rebuilt replacement comfortably justifies the premium via warranty and reliability, keeping the repair cost well within the vehicle's retained value.
Our Recommendation
Our Recommendation
For isolated AdBlue or EGR faults on a well-maintained Audi A4 40 TDI Quattro, targeted component repair is the most cost-effective route. However, if the vehicle has exceeded 150k miles and exhibits multiple concurrent issues, a reconditioned engine replacement offers superior long-term value and peace of mind.
Don't Let Engine Failure Write Off Your Audi A4 40 TDI Quattro
Navigating diesel engine repairs can be complex, but you don't have to accept main dealer premiums. By comparing quotes through EnginesMarket, you gain access to vetted UK specialists who provide rebuilt Audi A4 40 TDI Quattro engines with upgraded components, comprehensive 12-month unlimited-mileage warranties, and nationwide supply & fit options.
Compare rebuilt DET/DTPA Audi A4 40 TDI Quattro 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 A4 40 TDI Quattro. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Audi A4 40 TDI Quattro Engine ReplacementFrequently Asked Questions
Question 1How much does an Audi A4 40 TDI Quattro engine replacement cost-
The cost to replace an Audi A4 40 TDI Quattro engine typically ranges from £1,200 for a used unit to £3,800-£6,000 for a fully rebuilt engine (supply-only).
- Used engines are the most budget-friendly but carry higher risk.
- Reconditioned engines offer a balance of cost and reliability.
- Rebuilt engines provide the highest reliability with upgraded components.
Question 2What are the signs of a failing engine in an Audi A4 40 TDI Quattro-
Owners of the Audi A4 40 TDI Quattro should watch for persistent engine management lights, excessive blue or black smoke from the exhaust, and a noticeable loss of power or limp mode.
- Unusual rattling or knocking sounds from the engine bay.
- Frequent AdBlue or DPF warning messages that do not clear after regeneration.
- Unexplained coolant loss or oil consumption, which may indicate EGR or turbo issues.
Question 3Is it worth replacing the engine in an Audi A4 40 TDI Quattro-
Yes, for most owners, it is financially viable. The Audi A4 40 TDI Quattro retains strong residual values, typically ranging from £8,000 to £25,000 depending on the year and condition.
- A rebuilt engine is a sensible investment for a B9.5 (2020+) model.
- For older B9 (2015-2020) models, a high-quality reconditioned unit offers excellent value if you plan to keep the car for 2+ years.
- Always compare the replacement cost against the vehicle's current market value before proceeding.
Question 4How long does an Audi A4 40 TDI Quattro engine replacement take-
A professional supply and fit engine replacement for an Audi A4 40 TDI Quattro typically takes 2 to 3 working days.
- Day 1: Vehicle intake, draining of fluids, and careful removal of the faulty engine.
- Day 2: Installation of the replacement engine, reconnection of the Quattro drivetrain, and refilling of fluids.
- Day 3: ECU coding, software updates, and comprehensive road testing to ensure all systems are functioning correctly.
Question 5Will any 2.0 TDI engine fit my Audi A4 40 TDI Quattro-
No, you must ensure the replacement engine matches your specific engine code (e.g., DET, DTPA, or DTUA) and is configured for Quattro all-wheel drive.
- Non-Quattro engines lack the necessary rear differential drive components and mounting points.
- Using an incorrect engine code can result in ECU incompatibility, DPF/AdBlue system errors, and failed MOT emissions tests.
- Entering your registration on EnginesMarket guarantees the quote is matched to your exact DVLA-registered engine specification.
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