Audi A4 35 TDI / 2.0 TDI Engine ReplacementCompare Prices & Get Quotes

A reconditioned Audi A4 35 TDI / 2.0 TDI engine costs £2,200-£4,500 supply-only, or £3,000-£6,000 fully fitted depending on the generation (B8 EA189 vs B9 EA288) and supplier location. Used engines start around £900 but carry higher risk for emissions components.

• B8 EA189 (CAGA/CFFB): £2,200-£3,800 reconditioned
• B9 EA288 (CNHA/DEUA): £2,800-£4,500 reconditioned
• Supply & fit labour typically adds £600-£900

The "35 TDI" badge is simply Audi's WLTP naming convention introduced around 2020 to denote the 150hp 2.0 TDI engine (typically DETA or EA288 Evo codes). Mechanically, it is the same 2.0L diesel architecture as the older CNHA, just with updated emissions mapping and mild-hybrid alternator integration on some late B9 models.

• 2.0 TDI: Pre-2020 naming (140hp, 150hp, 170hp, 190hp)
• 35 TDI: Post-2020 WLTP naming (specifically 150hp)
• 40 TDI: Post-2020 WLTP naming (specifically 190hp)

For B8 models (2008-2015) valued between £4,000 and £12,000, a rebuilt engine at £3,200-£5,000 can represent a significant portion of the car's value. If your B8 is a high-spec S line or Quattro in excellent cosmetic condition, replacement is viable. For base SE models under £5,000, evaluate the scrap value first.

• Sub-£5,000 B8: Used engine or scrap is usually the financial reality
• £6,000-£12,000 B8: Reconditioned engine is a safe, value-retaining investment
• Always check for timing chain and turbo health before committing

Yes, the EA288 family (CNHA, DEUA) introduced in the B9 generation is generally more robust than the EA189. The EA288 moved the timing chain to the front of the engine (easier maintenance) and improved the high-pressure fuel pump. However, the EA288 is more sensitive to AdBlue system failures and urban DPF clogging.

• EA189: Prone to post-software-fix EGR/DPF soot issues
• EA288: Prone to AdBlue crystallisation and NOx sensor faults
• Both benefit from regular motorway driving to clear emissions systems

A complete engine swap on an Audi A4 typically takes 1.5 to 2.5 days for a supply-and-fit service. The B9 generation requires additional time for AdBlue system priming, ECU component protection removal, and online immobiliser coding via ODIS (Audi's diagnostic system).

• Engine removal and installation: 10-14 hours
• ECU coding and AdBlue calibration: 2-4 hours
• Road testing and DPF regeneration cycle: 2-3 hours

A properly installed, correct-code replacement engine will not negatively affect your MOT, provided the emissions hardware (DPF, EGR, AdBlue) is fully intact and functional. In fact, replacing a worn engine blowing blue smoke or suffering from severe compression loss is often the only way to pass an emissions MOT on a high-mileage diesel.

• Engine number changes must be documented on the V5C logbook
• Emissions tampering (DPF deletes) will result in an immediate MOT failure
• Rebuilt engines include fresh injector seals to prevent "Black Death" leaks