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BMW B47TU2 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The latest Technical Update 2 iteration of BMW's modular B47 2.0-litre diesel family, fitted to current G-series models and frequently paired with 48V mild-hybrid systems. Reconditioned units from £2,800 , with the broader B47 family generating 930 UK replacement requests in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£1,500
Reconditioned from
£2,800
Rebuilt from
£3,800
GB
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Quotes only from vetted UK engine specialists.
Key Specs
BMW B47TU2 - Specifications at a Glance
Engine Code
B47TU2
Fuel
Diesel
Configuration
2.0L inline-4, single turbo (48V mild-hybrid in most applications)
Power Output(s)
150 hp - 190 hp (depending on tune)
Years Produced
2019-Present
UK Models Fitted
6+ BMW models - full list in Compatibility below
Replaced
B47D20A
Replaced By
Current latest revision - no successor
Most Common Failure
EGR cooler faults and 48V mild-hybrid system issues
Reconditioned Price Range
£2,800-£4,500 supply-only
Vetted UK specialists for B47TU2 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the B47TU2-
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 BMW 1 Series | F40 | 116d, 118d, 120d | 2019-Present | |
 BMW 2 Series Active Tourer | U06 | 218d, 220d | 2021-Present | |
| BMW 3 Series | G20 / G28 | 318d, 320d | 2019-Present | |
 BMW 4 Series | G22 / G26 | 420d | 2020-Present | |
 BMW 5 Series | G30 LCI / G60 | 520d | 2020-Present | |
 BMW X1 | U11 | sDrive18d, xDrive20d | 2022-Present | |
 BMW X3 | G01 LCI | xDrive20d | 2021-Present |
02
BMW 2 Series Active Tourer
03
BMW 3 Series
04
BMW 4 Series
05
BMW 5 Series
06
BMW X1
07
BMW X3
CROSS-BRAND
B47TU2 is documented across 7 BMW applications spanning 1 Series, 2 Series Active Tourer, 3 Series, 4 Series, 5 Series, X1, X3. Registration lookup confirms the exact suffix before quotes are sent.
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Prices
BMW B47TU2 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £1,500-£2,800 | £2,020-£3,580 | 3-6 months |
Reconditioned | £2,800-£4,500 | £3,320-£5,280 | 12-24 months |
Rebuilt | £3,800-£5,800 | £4,320-£6,580 | 12-24 months |
The final cost of a BMW B47TU2 engine replacement is influenced by whether the host vehicle uses the 48V mild-hybrid system, as this adds integration complexity and requires specialist calibration on swap. Because the B47TU2 is a current-production engine, used units are scarce and command a premium over earlier B47 variants. Reconditioned units that include an updated EGR cooler and verified mild-hybrid compatibility offer the best long-term value. For a detailed breakdown of what affects your final bill, see our full reconditioned engine cost guide.
Labour Guide
Fitting a B47TU2 typically takes 8-12 hours at £65-£75/hr (independent) - confirm exact labour when comparing quotes.
Price Factors
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Common Problems
BMW B47TU2 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the B47TU2, based on real-world data and verified failure patterns.
Verified issue focus: EGR cooler faults and 48V mild-hybrid system issues.
1. EGR Cooler and Exhaust System Faults - 2019-Present
1. EGR Cooler and Exhaust System Faults - 2019-Present
Typical onset:
60,000-120,000 miles
What happens:
While significantly refined over the earlier B47D20A, the B47TU2 still carries an EGR cooler that can develop internal micro-fractures under sustained high-load use. Symptoms include unexplained coolant loss, occasional white exhaust smoke, and EGR-related fault codes on the dashboard. The risk is lower than on pre-2019 B47 units, but remains the most documented issue on this revision.
Repair vs replace:
If caught early, an EGR cooler replacement or system blanking (where legally compliant) is a manageable repair. If severe coolant ingress has caused hydrolock, a full B47TU2 engine replacement becomes necessary.
Read more about this issue
2. 48V Mild-Hybrid System Faults - 2019-Present
2. 48V Mild-Hybrid System Faults - 2019-Present
Typical onset:
80,000+ miles (emerging pattern)
What happens:
Most B47TU2 applications are paired with a 48V belt-driven starter-generator (BSG) and a small lithium-ion battery. Early reports from high-mileage units point to BSG failures and 48V battery degradation, presenting as intermittent stop-start faults, "drivetrain fault" warnings, or the engine refusing to restart after auto-stop. These are electrical/hybrid-system issues rather than core engine failures, but they require BMW-specific diagnostic equipment to resolve.
Repair vs replace:
The 48V system components are typically serviced separately from the engine itself. A full B47TU2 engine replacement is rarely required for mild-hybrid faults alone, but any replacement engine must be confirmed compatible with the host vehicle's 48V architecture.
Read more about this issue
The B47TU2 is widely regarded as the most reliable iteration of BMW's 2.0-litre diesel to date. The rear-mounted timing chain vulnerability that plagued the N47 family was resolved when the B47 moved the chain to the front in 2014, and the TU2 revision further strengthens this arrangement. Catastrophic engine failure is rare on this code when serviced to BMW's Longlife-04 oil specification .
Compare rebuilt B47TU2 prices with the failure already addressed
Engine Variants
How to Confirm You Have the B47TU2
The B47TU2 engine code is stamped directly onto the engine block, typically on a machined pad adjacent to the oil filter housing or on the front timing cover. It is also explicitly listed on your vehicle's V5C registration document under the engine details section, or it can be definitively verified via a VIN decode through a BMW specialist or the vehicle's iDrive service menu. The B47TU2 is most commonly confused with the earlier B47D20A, the higher-output B47D20B, the detuned B47D20D, and the transverse-platform variants B47C20U0 and B47C20U1. While these share the same 2.0-litre diesel architecture, fitting the wrong revision to a B47TU2 host will almost always cause issues: the B47TU2 is uniquely calibrated for 48V mild-hybrid integration, and its ECU mapping, BSG loom, and mounting orientation differ from earlier B47 variants. A non-TU2 unit dropped into a G-series mild-hybrid host will throw persistent drivetrain faults and will not integrate with the 48V system.
Not sure- Enter your registration above, and we will confirm your exact B47TU2 fitment instantly before any quotes are generated.
Easily Confused
B47D20A
- The earlier B47 generation that the TU2 replaced; it shares the same reliable front-mounted timing chain but lacks the 48V mild-hybrid integration and latest EGR refinements found in the TU2.
Confirm the exact B47TU2 fitment
Not sure- Enter your registration above, and we will confirm your exact B47TU2 fitment instantly before any quotes are generated.
Buying Guide
Buying a Replacement B47TU2 - 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 B47TU2 is a challenging purchase due to the engine's current-production status - supply is scarce and most salvage units come from write-offs with unknown 48V system history. Only consider a used B47TU2 if it carries a full BMW service history, the 48V BSG has been tested, and the EGR cooler shows no signs of weeping.
Reconditioned:
A proper reconditioned B47TU2 is the most balanced choice for most owners. A reputable rebuild will address the EGR cooler with an updated unit, verify the 48V BSG integration points, and replace all critical seals and gaskets, directly resolving the engine's most documented issues while restoring factory compression.
Rebuilt:
A full rebuild is justified for high-value G-series hosts such as the G20 3 Series or G30 5 Series, where long-term ownership is planned. An upgraded rebuild should include a revised EGR setup, verified 48V system compatibility, and potentially a remapped ECU to maximise longevity and efficiency.
Supply & Fit Line:
Sourcing and fitting your B47TU2 through our vetted network ensures the work is completed by BMW specialists familiar with the mild-hybrid integration, backed by a minimum 12-month warranty and nationwide delivery options.
Vehicle Value Note:
For typical host vehicles like the G20 3 Series, G30 5 Series, and G01 X3, current market values range from £18,000 to £45,000. A reconditioned B47TU2 replacement sits comfortably within this value band, making it a financially sound investment. Even for earlier G-series hosts valued around £14,000, the combination of strong retained values and the B47TU2's inherent reliability keeps the replacement cost well within the viable threshold.
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Related Engines
Engines Related to the BMW B47TU2
Explore engines that are closely related to the BMW B47TU2, including its predecessor, successor, and key family variants.
Predecessor
B47D20A
- The earlier B47 generation that the TU2 replaced; it shares the same reliable front-mounted timing chain but lacks the 48V mild-hybrid integration and latest EGR refinements found in the TU2.
Successor
None
The B47TU2 is currently the latest production revision of BMW's 2.0-litre diesel family, with no direct successor yet announced for current G-series hosts.
FAQ
BMW B47TU2Frequently Asked Questions
Question 1How much does a BMW B47TU2 engine replacement cost-
A reconditioned BMW B47TU2 engine typically costs between £2,800 and £4,500 for supply only, with fitted prices ranging from £3,320 to £5,280. Used units start around £1,500 but are scarce due to the engine's current-production status. Fitted costs generally include 8-12 hours of labour at independent specialist rates. Reconditioned units should include an updated EGR cooler and verified 48V mild-hybrid compatibility.
- Used units start around £1,500 but are scarce due to the engine's current-production status.
- Fitted costs generally include 8-12 hours of labour at independent specialist rates.
- Reconditioned units should include an updated EGR cooler and verified 48V mild-hybrid compatibility.
Question 2What is the most common problem with the B47TU2 engine-
The most documented issues are EGR cooler micro-fractures causing coolant leaks, and 48V mild-hybrid system faults such as belt-driven starter-generator failures. Typical onset for EGR issues is between 60,000 and 120,000 miles. Symptoms include unexplained coolant loss, white exhaust smoke, or intermittent stop-start and drivetrain fault warnings. Unlike the older N47, the front-mounted timing chain is highly reliable and rarely causes catastrophic failure.
- Typical onset for EGR issues is between 60,000 and 120,000 miles.
- Symptoms include unexplained coolant loss, white exhaust smoke, or intermittent stop-start and drivetrain fault warnings.
- Unlike the older N47, the front-mounted timing chain is highly reliable and rarely causes catastrophic failure.
Question 3Which BMW models use the B47TU2 engine-
The B47TU2 is fitted across BMW's latest G-series and newer F-series LCI models from 2019 onwards, primarily powering 18d and 20d badges with 48V mild-hybrid systems. Common hosts include the 3 Series (G20), 5 Series (G30 LCI/G60), X1 (U11), and X3 (G01 LCI). Always verify your specific chassis code and engine stamping before ordering a replacement unit.
- Common hosts include the 3 Series (G20), 5 Series (G30 LCI/G60), X1 (U11), and X3 (G01 LCI).
- Always verify your specific chassis code and engine stamping before ordering a replacement unit.
Question 4Should I buy a used or reconditioned B47TU2 engine-
A reconditioned B47TU2 is strongly recommended over a used unit due to the known EGR cooler vulnerabilities and the complexity of the 48V mild-hybrid system. A proper rebuild will address the EGR cooler with an updated unit, verify the 48V BSG integration points, and replace all critical seals. A used engine inherits the exact same EGR and hybrid system risks, and sourcing a low-mileage used TU2 is difficult given its current-production status.
- A proper rebuild will address the EGR cooler with an updated unit, verify the 48V BSG integration points, and replace all critical seals.
- A used engine inherits the exact same EGR and hybrid system risks, and sourcing a low-mileage used TU2 is difficult given its current-production status.
Question 5How do I know if my car has the B47TU2 engine-
The B47TU2 engine code is stamped on a machined pad on the engine block, typically located near the oil filter housing or front timing cover. It is also explicitly listed on your V5C registration document under the engine details section, or can be verified via a VIN decode. You can use our free registration lookup tool at the top of this page to confirm your exact engine code instantly before requesting quotes.
- It is also explicitly listed on your V5C registration document under the engine details section, or can be verified via a VIN decode.
- You can use our free registration lookup tool at the top of this page to confirm your exact engine code instantly before requesting quotes.
Compare BMW B47TU2 Engine Prices Today
Get a free, no-obligation comparison of BMW B47TU2 engine prices today. Our network provides quotes specific to your exact code, and our registration lookup confirms your fitment before any quotes are sent. With reconditioned B47TU2 units starting from £2,800, comparing takes two minutes and could save you hundreds on your replacement.
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Vetted UK specialists for B47TU2 replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
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Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
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