Audi 2.0 TDI / 35-40 TDI Specialists

Audi A6 2.0 TDI / 35-40 TDI Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Audi A6 2.0 TDI / 35-40 TDI 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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Audi A6 2.0 TDI / 35-40 TDI Engine

from£3,800 to £6,000...

Usedfrom £1,200
Reconditionedfrom £2,800
Common codesCAGB, CGLB, CAHA

Audi a6 2.0 TDI / 35-40 TDI Used Engine — CAGB / CGLB / CAHA

Audi a6Used Engine — CAGB / CGLB / CAHA

Audi a6 2.0 TDI / 35-40 TDI Reconditioned Engine — CAGB / CGLB / CAHA

Audi a6Reconditioned Engine — CAGB / CGLB / CAHA

Audi a6 2.0 TDI / 35-40 TDI Rebuilt Engine — CAGB / CGLB / CAHA

Audi a6Rebuilt Engine — CAGB / CGLB / CAHA

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide NetworkInstant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

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 A6 2.0 TDI / 35-40 TDI Engine History & Specs at a Glance

The 2.0 TDI / 35-40 TDI badge has been the backbone of the Audi A6 range, evolving from the C6 generation's pioneering common-rail diesels through the C7's refined EA189/EA288 units, to the C8's highly efficient mild-hybrid 35 TDI and 40 TDI variants.

2004
CAGB, 2.0L TDI, 136-170hp. Introduced with the C6 generation, marking the transition to common-rail diesel technology for improved refinement and efficiency.
2011
CAHA / CGLB, 2.0L TDI, 170hp. Launched with the C7 generation, featuring EA189 architecture with enhanced fuel economy and lower emissions.
2015
CNHA, 2.0L TDI, 190hp. Introduced with the C7 facelift, utilising EA288 architecture to meet Euro 6 standards, commonly badged as 40 TDI.
2018
DEJA / DEJB, 2.0L TDI Mild Hybrid, 150-204hp. Launched with the C8 generation, featuring a 12V mild-hybrid system for improved thermal efficiency, badged as 35 TDI and 40 TDI.

Every engine fitted to the Audi A6 2.0 TDI / 35-40 TDI is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Audi A6 2.0 TDI / 35-40 TDI Engine Codes Specifications & Replacement Cost

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

CAGB / CGLB / CAHA — 2.0L Diesel (2004-2015)

Power Output: 136-170hp
Years Fitted: 2004-2015

Can’t find your exact engine code?-> Get quotes for CAHA Audi A6 2.0 TDI / 35-40 TDI engine replacement

-> Get quotes for CAHA Audi A6 2.0 TDI / 35-40 TDI engine replacement

Common failure points and repair options

EGR Cooler Leaks & DPF Clogging

Affected: Audi A6 2.0 TDI / 35-40 TDI (CNHA, DEJA, DEJB, 2015-present)
Typical failure mileage: 100k-180k miles

Root cause

The EGR cooler is susceptible to internal micro-cracks, while frequent short urban journeys prevent the DPF from completing active regeneration, leading to ash buildup and increased backpressure.

Repair options

Repair tier	Dealer price	Specialist price
Component Repair (EGR/DPF)	£1,200-£2,200	£600-£1,200
Full Replacement - rebuilt/reconditioned engine	£5,500-£7,500	£4,300-£6,700

Our recommendation

For isolated EGR or DPF faults on a well-maintained Audi A6 2.0 TDI / 35-40 TDI, targeted component repair is the most cost-effective route. However, if the vehicle has exceeded 150k miles and exhibits concurrent issues, a reconditioned engine replacement offers superior long-term value and peace of mind.

-> Compare rebuilt CNHA Audi A6 2.0 TDI / 35-40 TDI engine prices

Timing Chain Tensioner Wear & Oil Pump Drive Issues

Affected: Audi A6 2.0 TDI / 35-40 TDI (CAGB, CAHA, 2004-2015)
Typical failure mileage: 80k-150k miles

Root cause

Early common-rail 2.0 TDI units can experience timing chain stretch or tensioner wear, while some C7 variants are prone to oil pump drive gear wear, leading to catastrophic oil starvation if ignored.

Repair options

Repair tier	Dealer price	Specialist price
Minor/Preventative (Chain/Tensioner check)	£800-£1,500	£500-£900
Full Replacement - rebuilt/reconditioned engine	£5,000-£7,000	£3,800-£5,500

Our recommendation

Preventative timing chain inspection at 80k miles is the best defence. If oil pump drive failure or chain jump has already occurred, replacing the entire unit with a rebuilt engine is safer than attempting standalone repairs, which risk recurring contamination or failure.

-> Compare rebuilt CAHA Audi A6 2.0 TDI / 35-40 TDI engine prices

Don't Let Engine Failure Write Off Your Audi A6 2.0 TDI / 35-40 TDI

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 A6 2.0 TDI / 35-40 TDI engines with upgraded components, comprehensive 12-month unlimited-mileage warranties, and nationwide supply & fit options.

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FAQ

Audi A6 2.0 TDI / 35-40 TDI Engine ReplacementFrequently Asked Questions

Everything Audi A6 2.0 TDI / 35-40 TDI owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

The cost to replace an Audi A6 2.0 TDI / 35-40 TDI engine typically ranges from £1,200 for a used unit to £3,800-£6,000 for a fully rebuilt EA288 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.

-> Compare Audi A6 2.0 TDI / 35-40 TDI engine prices today

Owners of the Audi A6 2.0 TDI / 35-40 TDI should watch for persistent engine management lights, excessive black smoke from the exhaust, and a noticeable loss of power or limp mode.

Unusual rattling sounds from the engine bay on cold starts (timing chain).
Frequent AdBlue or DPF warning messages that do not clear after regeneration.
Unexplained coolant loss, which may indicate an EGR cooler leak.

-> Get a diagnostic quote for your Audi A6 2.0 TDI / 35-40 TDI

Yes, for most owners, it is financially viable. The Audi A6 2.0 TDI / 35-40 TDI retains strong residual values, typically ranging from £8,000 to £35,000 depending on the generation and condition.

A rebuilt engine is a sensible investment for a C8 (2018+) model.
For older C7 (2011-2018) 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.

-> Check if your Audi A6 2.0 TDI / 35-40 TDI is worth repairing

A professional supply and fit engine replacement for an Audi A6 2.0 TDI / 35-40 TDI 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 drivetrain, and refilling of fluids.
Day 3: ECU coding, software updates, and comprehensive road testing to ensure all systems are functioning correctly.

-> Book your Audi A6 2.0 TDI / 35-40 TDI supply & fit service

No, you must ensure the replacement engine matches your specific engine code (e.g., CAGB, CNHA, or DEJA) and is configured for your drivetrain (FWD or Quattro).

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.

-> Confirm your exact Audi A6 2.0 TDI / 35-40 TDI engine code now

Why Choose Us

Compare Audi A6 2.0 TDI / 35-40 TDI Engine Prices Today

Don't overpay at the main dealer. Comparing quotes through EnginesMarket is 100% free and carries no obligation. We connect you directly with vetted, specialist workshops across the UK who understand the unique requirements of the Audi A6 2.0 TDI / 35-40 TDI, ensuring you get the right engine code, fair pricing, and peace of mind.

500+500+ Audi A6 2.0 TDI / 35-40 TDI engines supplied through our network

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Compare quotes from trusted UK Audi A6 2.0 TDI / 35-40 TDI engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.