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Alfa Romeo 939A2000 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The Alfa Romeo 939A2000 is the 1.9-litre turbo-diesel JTDM engine that powered the 159 and Brera from 2005 to 2011 - reconditioned units from approximately £800-£1,200, with steady demand from Alfa enthusiasts for this torquey, characterful diesel.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£400
Reconditioned from
£800
Rebuilt from
£1,200
GB
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Key Specs
Alfa Romeo 939A2000 - Specifications at a Glance
Engine Code
939A2000
Fuel
Diesel
Configuration
1.9L inline-4 turbo, DOHC 16-valve, common rail direct injection
Power Output
150 hp (110 kW)
Years Produced
2005-2011
UK Models Fitted
2 Alfa Romeo models - full list in Compatibility below
2025 UK Replacement Requests
Replaced
1.9 JTD (earlier engine)
Replaced By
2.0 JTDM (later engines)
Most Common Failure
Timing chain stretch / DPF & EGR clogging
Reconditioned Price Range
£800-£1,200 supply-only
Vetted UK specialists for 939A2000 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Models Use the Alfa Romeo 939A2000-
**TAG:** Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Alfa Romeo 159 | 939 | 1.9 JTDM 16V (150 hp) | 2005-2011 | |
| Alfa Romeo 159 Sportwagon | 939 | 1.9 JTDM 16V (150 hp) | 2006-2011 | |
| Alfa Romeo Brera | 939 | 1.9 JTDM 16V (150 hp) | 2006-2010 |
02
Alfa Romeo 159 Sportwagon
03
Alfa Romeo Brera
CROSS-BRAND
939A2000 is documented across 3 BMW applications spanning Alfa Romeo 159, Alfa Romeo 159 Sportwagon, Alfa Romeo Brera. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
Alfa Romeo 939A2000 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £400-£700 | £580-£1,000 | 3-6 months |
Reconditioned | £800-£1,200 | £980-£1,500 | 12-24 months |
Rebuilt | £1,200-£2,000 | £1,380-£2,300 | 12-24 months |
All figures . Fitted = supply price + labour band below.
Labour Guide
Fitting a 939A2000 typically takes 8-11 hours at £65-£91/hr (independent Alfa specialist) - confirm exact labour when comparing quotes.
Price Factors
What moves the price on a 939A2000 is the condition of the timing chain, the state of the DPF and EGR system, and whether the dual-mass flywheel has been replaced. A reconditioned unit that includes a new timing chain, cleaned DPF, and new gaskets commands a premium over a used take-out. See our full reconditioned engine cost guide.
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Common Problems
Alfa Romeo 939A2000 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 939A2000, based on real-world data and verified failure patterns.
Verified issue focus: Timing chain stretch / DPF & EGR clogging.
1. Timing Chain Stretch - The 939A2000's Most Notorious Issue
1. Timing Chain Stretch - The 939A2000's Most Notorious Issue
Typical onset:
60,000-100,000 miles
What happens:
Like many Alfa Romeo diesel engines, the 939A2000 uses a timing chain that can stretch over time. The chain is located at the rear of the engine, making replacement a labour-intensive job. Symptoms include rattling on cold start-up, poor performance, and check-engine lights. If the chain jumps, valves will contact pistons, resulting in catastrophic engine failure. This is the single biggest failure point on the 1.9 JTDM.
Repair vs replace:
If caught early (rattling only), timing chain and tensioner replacement is a manageable repair (£800-£1,500). If the chain has jumped, the engine is typically beyond economical repair - a full replacement is the only option. Read our full timing chain failure guide
Read more about this issue
2. DPF & EGR Clogging - Urban Driving & Regeneration Issues
2. DPF & EGR Clogging - Urban Driving & Regeneration Issues
Typical onset:
40,000-80,000 miles (earlier with extensive urban use)
What happens:
The 939A2000's Diesel Particulate Filter (DPF) and Exhaust Gas Recirculation (EGR) system are prone to clogging, particularly on vehicles used primarily for short urban journeys where the DPF cannot complete a regeneration cycle. Symptoms include reduced power, increased fuel consumption, and warning lights. The EGR valve can also stick due to carbon buildup.
Repair vs replace:
DPF cleaning is a specialist job (£200-£600). EGR valve cleaning or replacement is also manageable (£200-£500). These are repairable issues and rarely require engine replacement. Read our full DPF failure guide
Read more about this issue
3. Dual-Mass Flywheel (DMF) Wear - Clutch Judder & Vibrations
3. Dual-Mass Flywheel (DMF) Wear - Clutch Judder & Vibrations
Typical onset:
60,000-100,000 miles
What happens:
The 939A2000's dual-mass flywheel is a known wear item, particularly on high-torque diesel engines. Symptoms include clutch judder, vibration at idle, and a rattling noise from the bellhousing when the engine is running. If the DMF fails, it can damage the starter motor and gearbox input shaft.
Repair vs replace:
DMF replacement is a gearbox-out job (£800-£1,200) and is often done alongside a clutch replacement. This does not typically require engine replacement.
Read more about this issue
The 939A2000 was produced from 2005 to 2011, with later engines (2008+) benefiting from improved timing chain materials and revised tensioner design. However, the core vulnerabilities remain - regular oil changes (5,000-8,000 miles) with the correct 5W-40 oil are essential to protect the timing chain and turbocharger. The DPF and EGR issues are inherent to all modern diesels with urban use - regular motorway driving to allow DPF regeneration is essential.
Compare rebuilt 939A2000 prices with the timing chain already replaced
Engine Variants
How to Confirm You Have the 939A2000
The 939A2000 is the 1.9-litre JTDM diesel engine, producing 150 hp (110 kW). It is part of the GM/Fiat 1.9 JTDM family and is used exclusively in the Alfa Romeo 159 and Brera. It is distinguished from earlier 1.9 JTD engines by its 16-valve cylinder head and common-rail injection system. Where the code appears: - Stamped on a metal plate on the engine block (left-hand side) - On the V5C logbook under "Engine number" (the first 8 characters will read 939A2000) - Via Alfa Romeo VIN decoder Commonly confused with: - [939A6000 - LINK PENDING - page not in current inventory] - the 1.9 JTS petrol engine (160 hp), used in some 159 models; completely different engine, not interchangeable - [939A000 - LINK PENDING - page not in current inventory] - the 3.2 V6 JTS petrol engine (260 hp), used in higher-spec 159 and Brera models - [939A4000 - LINK PENDING - page not in current inventory] - another variant of the 1.9 JTDM with different power output
Not sure which engine variant you have- Enter your registration above and we'll confirm your exact engine code before sending any quotes.
Easily Confused
1.9 JTD
LINK PENDING - page not in current inventory] - the earlier 1.9-litre diesel engine used in previous Alfa Romeo models (156, 147, GT). Used 8-valve cylinder heads and different injection technology - the 939A2000 introduced 16-valve heads and improved common-rail for better performance and refinement.
Alternative / Next-Gen Code
2.0 JTDM
LINK PENDING - page not in current inventory] - the 2.0-litre diesel engine that replaced the 1.9 JTDM in later Alfa Romeo models. Larger displacement and improved emissions - not a straight swap with the 1.9L 939A2000.
Related JLR Variants
The 939A2000 is an Alfa Romeo-specific version of the GM/Fiat 1.9 JTDM engine, also used in some Fiat and Opel/Vauxhall models. However, Alfa Romeo-spec engines have specific ECU calibration, injectors, and sometimes different turbocharger specifications. Always confirm fitment by engine code, not by brand.
Confirm the exact 939A2000 fitment
Not sure which engine variant you have- Enter your registration above and we'll confirm your exact engine code before sending any quotes.
Buying Guide
Buying a Replacement 939A2000 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
** A used 939A2000 can make sense for lower-value 159 or Brera models where the car's value doesn't justify a recon unit. However, the timing chain and DPF are the biggest risks - only consider a used unit with documented proof of recent timing chain replacement, DPF cleaning, and regular oil service history. Without that, factor in £800-£1,500 for preventative work (timing chain, DPF cleaning).
Reconditioned:
** A proper 939A2000 recon is the best option for owners planning to keep their Alfa long-term. A quality recon should include: full strip and inspection, new timing chain and tensioner (critical), new injectors or full refurbishment, DPF cleaning, new gaskets and seals, and a full test. With a 12-24 month warranty, this gives you peace of mind that the engine's known weaknesses have been addressed - well worth the £800-£1,200 supply cost.
Rebuilt:
** A full rebuild is justified when the original engine has suffered catastrophic failure (chain jump, DPF blockage leading to oil dilution, injector failure) and the car is a cherished keeper. An upgraded rebuild should include new pistons/rings, refreshed cylinder head, new timing chain and guides, and a full DPF/turbo overhaul. This is specialist territory and typically only makes sense for cars with strong residual value.
Supply & Fit Line:
** All engines can be supplied and fitted through our network of vetted Alfa Romeo diesel specialists nationwide, with 12-month warranty on reconditioned and rebuilt units. Link once: /services/supply-and-fit
Vehicle Value Note:
** The 939A2000 sits in Alfa Romeo 159 and Brera - cars now worth £2,000-£10,000 depending on age, condition, and spec. With a reconditioned supply cost of £800-£1,200, replacement is viable on most examples. However, for a sub-£2,000 159 or Brera with high mileage and a failed engine, a used unit (£400-£700) with documented history may be the only sensible option. For cars worth under £1,500, consider breaking the car before committing to a replacement engine. Given the Alfa Romeo brand's passionate following and the 159/Brera's growing classic status, many owners choose to invest in a reconditioned engine to preserve their car.
** Compare 939A2000 Engine Prices Now --- **Correction applied:** The 939A2000 engine code is a 1.9-litre diesel JTDM engine (150 hp), not a 2.0-litre petrol JTS as initially stated. The 2.0 JTS petrol engine in the 159/Brera is a different code (likely 939A6000). This correction has been applied throughout. Pricing . Request volume as not EM-VERIFIED. Failure patterns from specialist and owner sources .
Related Engines
Engines Related to the Alfa Romeo 939A2000
Explore engines that are closely related to the Alfa Romeo 939A2000, including its predecessor, successor, and key family variants.
Predecessor
1.9 JTD
LINK PENDING - page not in current inventory] - the earlier 1.9-litre diesel engine used in previous Alfa Romeo models (156, 147, GT). Used 8-valve cylinder heads and different injection technology - the 939A2000 introduced 16-valve heads and improved common-rail for better performance and refinement.
Successor
2.0 JTDM
LINK PENDING - page not in current inventory] - the 2.0-litre diesel engine that replaced the 1.9 JTDM in later Alfa Romeo models. Larger displacement and improved emissions - not a straight swap with the 1.9L 939A2000.
Cross-Brand Twin
The 939A2000 is an Alfa Romeo-specific version of the GM/Fiat 1.9 JTDM engine, also used in some Fiat and Opel/Vauxhall models. However, Alfa Romeo-spec engines have specific ECU calibration, injectors, and sometimes different turbocharger specifications. Always confirm fitment by engine code, not by brand.
FAQ
Alfa Romeo 939A2000Frequently Asked Questions
Question 1How much does an Alfa Romeo 939A2000 engine replacement cost-
A reconditioned 939A2000 supply-only costs approximately £800-£1,200, with fitted prices ranging from £980 to £1,500 depending on labour rates. Used units start at £400-£700, and full rebuilds run from £1,200-£2,000. Prices are supply-only; fitting adds 8-11 hours at independent Alfa specialist rates. Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
- Prices are supply-only; fitting adds 8-11 hours at independent Alfa specialist rates.
- Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
Question 2What are the most common failures on the 939A2000 1.9 JTDM engine-
The most documented issues are timing chain stretch (causing rattling on start-up and potential chain jump), DPF and EGR clogging (particularly with urban driving), and dual-mass flywheel wear (clutch judder and vibrations). The timing chain is the single biggest failure point on the 1.9 JTDM - regular oil changes with the correct 5W-40 oil are essential to protect it. Timing chain: rattling on start-up is the early warning sign. DPF/EGR: regular motorway driving for regeneration is essential. DMF: replacement at clutch change is recommended.
- Timing chain: rattling on start-up is the early warning sign.
- DPF/EGR: regular motorway driving for regeneration is essential.
- DMF: replacement at clutch change is recommended.
Question 3Which Alfa Romeo models use the 939A2000 engine-
The 939A2000 was fitted to Alfa Romeo 159 (sedan & Sportwagon) and Brera between 2005 and 2011. It is a 1.9-litre diesel producing 150 hp. Not to be confused with the 1.9 JTS petrol engine (different code). Not to be confused with the 3.2 V6 JTS petrol engine.
- Not to be confused with the 1.9 JTS petrol engine (different code).
- Not to be confused with the 3.2 V6 JTS petrol engine.
Question 4Should I buy a used or reconditioned 939A2000 engine-
A used 939A2000 can be viable for lower-value 159 or Brera models, but only if it has documented proof of recent timing chain replacement, DPF cleaning, and regular oil service history. Without that, factor in £800-£1,500 for preventative work (timing chain, DPF cleaning). A reconditioned engine is the safer choice - it includes new timing chain, DPF cleaning, and gaskets, with a 12-24 month warranty. Used is cheaper (£400-£700) but timing chain and DPF risks are significant. Reconditioned addresses all known weak points and gives peace of mind.
- Used: cheaper (£400-£700) but timing chain and DPF risks are significant.
- Reconditioned: addresses all known weak points and gives peace of mind.
Question 5How do I confirm if my car has the 939A2000 or another engine-
Check the engine code stamped on the block (left-hand side) - it will read 939A2000 for the 1.9 JTDM diesel, or another code for petrol variants (e.g., 939A6000 for 1.9 JTS petrol). The V5C logbook also lists the full engine number, with the first 8 characters identifying the code. 939A2000: 1.9L JTDM diesel (150 hp), used in 159 & Brera. 939A6000: 1.9L JTS petrol (160 hp), different engine. 939A000: 3.2L V6 JTS petrol, different engine.
- 939A2000: 1.9L JTDM diesel (150 hp), used in 159 & Brera.
- 939A6000: 1.9L JTS petrol (160 hp), different engine.
- 939A000: 3.2L V6 JTS petrol, different engine.
Question 6How long does a 939A2000 engine typically last-
With meticulous maintenance and early preventative work, these engines can exceed 120,000-150,000 miles. The 939A2000 is fundamentally a robust engine; the limiting factors are the timing chain, DPF/EGR system, and dual-mass flywheel. Timing chain replacement recommended at 60k-80k miles as preventative. DPF/EGR: regular motorway driving for regeneration is essential. Regular oil changes (5,000-8,000 miles) with 5W-40 oil are essential.
- Timing chain replacement recommended at 60k-80k miles as preventative.
- DPF/EGR: regular motorway driving for regeneration is essential.
- Regular oil changes (5,000-8,000 miles) with 5W-40 oil are essential.
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