What are the common problems with the Audi A5 50 TDI 3.0 V6 engine-

Common symptoms include coolant loss, oil in the coolant reservoir, and intermittent check engine lights. The plastic oil cooler housing and EGR cooler internals are known weak points on the 3.0 TDI V6. Coolant puddles under the front of the vehicle suggest oil cooler failure. ECU fault codes for coolant temperature or EGR flow deviation. Limp mode activation to protect the engine from overheating.

Is it worth replacing the engine in an Audi A5 30 TDI mild hybrid-

For B9 facelift and B10 models (2019-present) valued £18,000-£28,000, a rebuilt engine at £3,800-£6,000 typically represents excellent value if you plan to keep the car 2+ years. 30 TDI models retain strong residual values. Rebuilt engine cost is a small percentage of total vehicle value. Always check for turbo and DPF health before committing.

Audi 30 TDI / 45 TDI / 50 TDI SPECIALISTS

Audi A5 30 TDI / 45 TDI / 50 TDI Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Audi A5 30 TDI / 45 TDI / 50 TDI engine specialists. Compare prices on reconditioned, rebuilt and used engines for DEZB, DCPE, DCPC and DMGA engine codes across B9 facelift and B10 generations.

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Audi A5 30 TDI / 45 TDI / 50 TDI Engine History & Specs at a Glance

The 30 TDI, 45 TDI, and 50 TDI badges were introduced during the B9 facelift as part of Audi's WLTP naming convention, denoting specific power tiers of the 2.0 TDI and 3.0 TDI V6 engines, and continue into the current B10 generation.

2019
B9 facelift introduces WLTP naming: 30 TDI (2.0L, 136hp, DEZB), 45 TDI (3.0L V6, 231hp, DCPE), and 50 TDI (3.0L V6, 286hp, DCPC).
2020
50 TDI updates to the DMGA engine code, introducing a 48V mild-hybrid system for improved efficiency and smoother stop-start operation.
2024
B10 generation launches, continuing the 30 TDI, 45 TDI, and 50 TDI badge structure with refined EA288 Evo and updated V6 TDI architectures for stricter Euro 6d/7 compliance.

Every engine fitted to the Audi A5 30 TDI / 45 TDI / 50 TDI is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Audi A5 30 TDI / 45 TDI / 50 TDI Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

DEZB — 2.0L Diesel EA288 Evo (2019-present)

Power Output: 136hp
Years Fitted: 2019-present

Can’t find your exact engine code?-> Get quotes for DEZB Audi A5 30 TDI / 45 TDI / 50 TDI engine replacement

-> Get quotes for DEZB Audi A5 30 TDI / 45 TDI / 50 TDI engine replacement

Common Problems

Audi A5 30 TDI / 45 TDI / 50 TDI Engine Problems Repair Cost vs Replacement

The Audi A5 30 TDI / 45 TDI / 50 TDI engines are generally robust when maintained properly, but high-mileage examples commonly face EGR cooler leaks, DPF clogging, and oil cooler seal degradation. The DCPE and DMGA V6 codes dominate replacement demand for this variant, particularly on B9 facelift and B10 cars with 100k+ miles. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Oil Cooler & EGR Leaks

Affected: Audi A5 45 TDI / 50 TDI (DCPE, DCPC, DMGA, 2019-present)
Typical failure mileage: 80k-140k miles

Root cause

The plastic oil cooler housing and EGR cooler internals degrade over time, leading to coolant mixing with oil or external leaks, which can trigger limp mode and risk catastrophic engine damage if ignored.

Repair options

Repair tier	Dealer price	Specialist price
Cooler Replacement Only	£1,200-£2,200	£800-£1,500
Full Replacement - rebuilt/reconditioned engine	£7,000-£11,000	£6,000-£9,500 (matches Section 4 rebuilt figure)

Our recommendation

If coolant has contaminated the oil, a simple cooler swap is insufficient, as metal debris or sludge may have circulated. A rebuilt engine with upgraded metal cooler components is the most reliable long-term fix to protect the quattro drivetrain.

-> Compare rebuilt DCPE/DMGA Audi A5 30 TDI / 45 TDI / 50 TDI engine prices

DPF & EGR Clogging

Affected: Audi A5 30 TDI (DEZB, 2019-present)
Typical failure mileage: 100k-180k miles

Root cause

Short-trip urban driving prevents active DPF regeneration cycles, causing soot buildup that eventually blocks the filter and forces the EGR valve into constant recirculation, reducing power and triggering emissions warnings.

Repair options

Repair tier	Dealer price	Specialist price
DPF Cleaning (off-car)	£400-£800	£250-£500
DPF Replacement + EGR Clean	£1,500-£2,800	£900-£1,800
Full Replacement - rebuilt/reconditioned engine	£4,500-£7,000	£3,800-£6,000 (matches Section 4 rebuilt figure)

Our recommendation

If the DPF failed due to driving patterns that won't change, even a new DPF will clog again. A rebuilt engine won't solve this unless you also address usage patterns. However, if DPF blockage caused turbo damage or severe oil dilution, replacement is the only safe option.

-> Compare rebuilt DEZB Audi A5 30 TDI / 45 TDI / 50 TDI engine prices

Don't Let Engine Failure Write Off Your Audi A5 30 TDI / 45 TDI / 50 TDI

Whether you are dealing with EGR leaks on a 50 TDI V6 or DPF clogging on a 30 TDI mild-hybrid, piecemeal repairs can quickly escalate past the cost of a replacement. Rather than risking repeated garage visits, a rebuilt engine from our specialist network includes upgraded components addressing these known failure points, backed by a 12-month unlimited-mileage warranty. Compare quotes today and save 30-50% versus dealer pricing while getting nationwide supply-and-fit service.

Compare Audi A5 30 TDI / 45 TDI / 50 TDI Engine Replacement Prices Now ->

FAQ

Audi A5 30 TDI / 45 TDI / 50 TDI Engine ReplacementFrequently Asked Questions

Everything Audi A5 30 TDI / 45 TDI / 50 TDI owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

A reconditioned Audi A5 30 TDI / 45 TDI / 50 TDI engine costs £2,800-£7,500 supply-only, or £3,800-£9,500 fully fitted depending on whether it is the 2.0L (DEZB) or 3.0L V6 (DCPE/DMGA) and supplier location. Used engines start around £1,200 but carry higher risk for complex V6 components.

30 TDI (DEZB, 136hp): £2,800-£4,500 reconditioned
45/50 TDI (DCPE/DMGA, 231-286hp): £4,500-£7,500 reconditioned

-> Get quotes for your specific Audi A5 30 TDI / 45 TDI / 50 TDI engine code

Common symptoms include coolant loss, oil in the coolant reservoir, and intermittent check engine lights. The plastic oil cooler housing and EGR cooler internals are known weak points on the 3.0 TDI V6.

Coolant puddles under the front of the vehicle suggest oil cooler failure
ECU fault codes for coolant temperature or EGR flow deviation
Limp mode activation to protect the engine from overheating

-> Compare rebuilt DCPC/DMGA Audi A5 30 TDI / 45 TDI / 50 TDI engine prices if overheating has occurred

For B9 facelift and B10 models (2019-present) valued £18,000-£28,000, a rebuilt engine at £3,800-£6,000 typically represents excellent value if you plan to keep the car 2+ years.

30 TDI models retain strong residual values
Rebuilt engine cost is a small percentage of total vehicle value
Always check for turbo and DPF health before committing

-> Get a tailored quote for your Audi A5 30 TDI / 45 TDI / 50 TDI based on current value

The 45 TDI uses a 3.0L V6 diesel engine producing 231hp (engine code DCPE), while the 50 TDI uses a higher-output version of the same 3.0L V6 architecture producing 286hp (engine codes DCPC/DMGA). The 50 TDI also features a 48V mild-hybrid system from 2020 onwards for smoother stop-start operation.

45 TDI (DCPE): 2019-present, 231hp, standard 12V electrical system
50 TDI (DCPC/DMGA): 2019-present, 286hp, 48V mild-hybrid integration

-> Get quotes for your specific Audi A5 30 TDI / 45 TDI / 50 TDI engine code

A complete engine swap typically takes 2 to 3 days for a supply-and-fit service. The V6 variants require additional time for ECU component protection removal, AdBlue system priming, and online immobiliser coding via ODIS (Audi's diagnostic system).

Engine removal and installation: 12-16 hours
ECU coding and quattro calibration: 3-5 hours
Road testing and DPF regeneration cycle: 2-3 hours

-> Book your Audi A5 30 TDI / 45 TDI / 50 TDI supply-and-fit service today

Yes, reconditioned 45 TDI and 50 TDI V6 engines from our specialists include upgraded components addressing known failure points like revised metal oil cooler housings, updated EGR coolers, and reinforced turbo actuators. With proper maintenance, a quality reconditioned unit should last 80k-120k miles.

All rebuilt engines include minimum 12-month unlimited-mileage warranty
Upgraded parts address original design weaknesses
Specialist rebuilders test compression and oil pressure before dispatch

-> Compare reconditioned Audi A5 30 TDI / 45 TDI / 50 TDI engine prices from vetted UK specialists

Why Choose Us

Compare Audi A5 30 TDI / 45 TDI / 50 TDI Engine Prices Today

Whether you need a DEZB replacement for your 2020 30 TDI, a DCPE for your 2021 45 TDI S line, or a DMGA for your 2023 50 TDI Vorsprung, comparing quotes through EnginesMarket is free, fast and no-obligation. Our vetted UK specialists stock all A5 TDI engine codes and offer transparent pricing on used, reconditioned and rebuilt units. Get multiple quotes in minutes and save 30-50% versus dealer pricing, with every engine backed by a minimum 12-month warranty.

200+200+ Audi A5 30 TDI / 45 TDI / 50 TDI engines supplied through our network

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Compare quotes from trusted UK Audi A5 30 TDI / 45 TDI / 50 TDI engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.