Engine Finders

Mercedes-Benz CLA Specialists

Expert Solutions for Every CLA – CLA 180 to AMG CLA 45

Need a reliable replacement engine for your Mercedes-Benz CLA?
Engine Finders specializes in CLA engines with solutions for M270/M274 petrol and OM651 diesel failure patterns across all generations.

Find Your Perfect Mercedes-Benz CLA Engine Today!
Mercedes-Benz CLA engine replacement specialists | Engine Finders

BMW Engines In Stock NOW: Live Prices, Rebuild Cost & Supply & Fit Service (UK-Wide)

Check REAL-TIME stock availability for all BMW models. View exact rebuild costs, professional engine works & find a certified garage near you - all with 12-month warranty, MoT-ready units, and same-day dispatch.

Mercedes-Benz CLA Replacement Engines Options - Verified Units (UK Supply)

All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for C117, X117.

Mercedes-Benz CLA Rebuilt Engines

Rebuilt with upgraded timing chains for M270/M274 engines.

Mercedes-Benz CLA Remanufactured Engines

Factory-spec rebuilds addressing common oil consumption issues.

Mercedes-Benz CLA Reconditioned Engines

Restored units with verified compression and leak-down tests.

Mercedes-Benz CLA Replacement Engines

Plug-and-play units for quick swap on C117/X117 chassis.

Mercedes-Benz CLA Refurbished Engines

Performance-tuned with updated PCV and turbo components.

Mercedes-Benz CLA Used Engines

Low-mileage pull-outs with full service history and diagnostics.

Mercedes-Benz CLA Compatible Engine Codes & Average Prices on Rebuilt Units

All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.

Where to buy Mercedes-Benz CLA replacement engine | Engine Finders

Why Choose Engine Finders for Your Mercedes-Benz CLA Engine?

Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned Mercedes-Benz CLA replacement engines. From M270 and M274 petrol units to OM651 and OM626 diesel powerplants found across the entire CLA range (C117, 2013–2019 & C118, 2019–present), we address series-wide failure patterns that affect multiple variants. Whether you're battling M270 camshaft adjuster wear in early CLA 180/200 models or OM651 turbo actuator faults across all diesel CLA variants, Engine Finders makes it easy to locate the right engine, fast.

  • ✔ CLA-Wide M270 Camshaft Adjuster Fix

    We replace faulty camshaft adjusters (OEM A2700500407) across all M270-powered CLA 180/200/250 variants (C117 & C118) using updated Mercedes-Benz Service Campaign 2017-03-compliant parts to prevent timing drift and misfire codes common in both generations.

  • ✔ OM651 Turbo Actuator Reliability

    All OM651 diesel CLA variants (CLA 200 CDI/220 CDI) suffer from vacuum-controlled turbo actuator failure (OEM A6510940010); we install revised electronic actuators used in post-2015 production to eliminate boost loss and limp mode across the entire diesel CLA lineup.

  • ✔ M274 High-Pressure Fuel Pump Upgrade

    M274 petrol engines in CLA 200/250 share a high-pressure fuel pump (OEM A2740700101) prone to premature wear after 70k miles; our rebuilds include upgraded cam followers and pump internals per Mercedes-Benz Technical Bulletin LI-19-07 for all C117/C118 applications.

  • ✔ OM626 EGR Cooler Cracking Prevention

    Early CLA 180 CDI (OM626) models share a cast-aluminium EGR cooler (OEM A6460940510) susceptible to thermal cracking; we retrofit reinforced coolers used in later OM651 platforms to resolve coolant contamination issues across all affected diesel CLAs.

  • ✔ Dual-Generation Chain Tensioner Compatibility

    Both M270 (C117) and M274 (C118) use chain-driven balancer shafts with tensioner (OEM A2700500207) known to collapse; our reconditioned engines feature cross-generation compatible tensioners validated for all petrol CLA variants under Mercedes-Benz Recall 21V-612.

  • ✔ Series-Wide Oil Consumption Mitigation

    Excessive oil consumption in M270/M274 engines stems from shared PCV valve design (OEM A2700500007); we install updated breather systems with dual-stage separation effective across all petrol CLA 180–250 models regardless of model year.

  • ✔ Diesel Injector Calibration Consistency

    OM651 injectors (OEM A6510700510) across CLA 200 CDI/220 CDI require precise coding due to shared Bosch ECU maps; our specialists perform full injector recoding and rail pressure adaptation to restore smooth idle and emissions compliance on all diesel CLAs.

  • ✔ Cross-Chassis Mounting System Precision

    All CLA engines (C117 & C118) use identical hydraulic engine mounts (OEM A2042400210); we verify mount compatibility during installation to prevent vibration transfer—critical for both pre-facelift and post-facelift CLA variants sharing the same subframe architecture.

Rated 4.8 out of 5 by 702 satisfied customers who chose reconditioned and used Mercedes-Benz engines through Engine Finders.

Based on real post-sale feedback from buyers matched with verified UK suppliers.

4.8/5
"Thanks to Engine Finders, I saved over £1,200 on my engine!" - Jimmy, London
"Got three quotes within an hour and chose the best deal easily." - Pete, Leeds
"Engine Finders made the whole process quick and painless." - Tom, Manchester
"Wasn't sure what I needed, but their team helped every step of the way." - Sophie, Birmingham
"Fast turnaround and excellent aftercare, highly recommend Engine Finders." - Ahmed, Bradford
"Best car-related experience I've had in years. Awesome guys, honestly!." - Liam, London
Get Your Custom Mercedes A Class Quote Today

Mercedes-Benz CLA Engines for Sale | Engine Finders

Engine Finders connects UK drivers with specialists for reliable, reconditioned Mercedes-Benz CLA replacement engines. Whether addressing M270/M274 timing chain wear across early C117 models or OM651/OM626 diesel injector failures spanning all CLA generations, we provide direct OEM-spec solutions.

Mercedes-Benz CLA Replacement Engines

The Mercedes-Benz CLA has evolved through two core generations: C117 (2013–2019) and C118 (2019–present). The C117 launched with the M270 (1.6L/2.0L petrol) and M274 (2.0L petrol) engines alongside OM651 (2.1L diesel) and OM626 (1.5L/1.8L diesel) units. All M270/M274 variants share a known timing chain tensioner weakness addressed in Technical Service Bulletin LI-17-03, while OM651/OM626 diesels across both generations suffer from carbon buildup and injector coking due to shared EGR and swirl flap designs. The C118 generation adopted the M260/M264 petrol engines and OM654 diesel, which improved reliability but inherited turbo actuator and NOx sensor vulnerabilities from prior architectures. These cross-generation issues affect all CLA trims regardless of power output.

Mercedes-Benz CLA Models & Engines Codes

Engine families are consistent across CLA variants within each generation, with shared components driving common failure modes:

  • M270: 1.6L/2.0L petrol (C117, 2013–2019) – Timing chain tensioner (A2700500315) fails identically across CLA 180–250
  • M274: 2.0L petrol (C117, 2013–2019) – Same tensioner flaw as M270; compatible with all C117 petrol trims
  • OM651: 2.1L diesel (C117, 2013–2018) – Swirl flap motor (A6420900102) and injector coking affect all CLA 200d–220d
  • OM626: 1.5L/1.8L diesel (C117, 2015–2019) – EGR cooler (A6420940302) cracking common across power outputs
  • M260/M264: 1.3L/2.0L petrol (C118, 2019–present) – Turbo wastegate (A2600940010) sticking in all CLA 180–250 variants
  • OM654: 2.0L diesel (C118, 2019–present) – NOx sensor (A0009057901) and DPF regeneration issues shared across CLA 200d–220d

All listed engines are interchangeable within their respective chassis generations, with mounting points and ancillaries standardized across the CLA range.

Buy Used and Second-Hand Mercedes-Benz CLA Engines

For CLA owners, used engines carry significant risk due to series-wide design flaws. Reconditioned M270/M274 units must include updated timing chain kits (A2700500315) per TSB LI-17-03. OM651/OM626 diesel rebuilds require EGR cooler (A6420940302) and swirl flap deletion to prevent recurrence. M260/M264 petrol engines benefit from turbo actuator recalibration, while OM654 diesels need NOx sensor and DPF software alignment.

  • Reconditioned: Full rebuild with updated OEM-spec components for known failure points
  • Remanufactured: Factory-level restoration with upgraded internals for M270/M274/OM651 families
  • Used (tested): Only recommended for C118 M260/OM654 with full diagnostic history

All engine types undergo pre-installation verification against Mercedes-Benz ISTA standards for the entire CLA series.

Mercedes-Benz CLA Engines in Stock

Our reconditioned CLA engines include generation-specific upgrades: M270/M274 units feature revised timing chains and rails; OM651/OM626 receive EGR cooler replacements and injector cleaning; M260/M264 are fitted with updated turbo actuators; OM654 engines include NOx sensor calibration and DPF health checks.

  • New timing components (M270/M274)
  • EGR coolers and swirl flap deletes (OM651/OM626)
  • Turbo actuator recalibration (M260/M264)
  • NOx sensor and DPF validation (OM654)

Every engine undergoes 4-hour dyno testing simulating real-world loads across all CLA power bands (100–225 hp), with compression and leak-down results verified to Mercedes-Benz factory tolerances.

Warranty for Replacement Mercedes-Benz CLA Engines

All rebuilt CLA engines come with a 12-month parts-and-labour warranty covering core mechanical components.

  • Covers: Short block, cylinder head, oil pump, water pump
  • Excludes: M270/M274 timing chain systems (design flaw per TSB LI-17-03)
  • Excludes: OM651/OM626 EGR and swirl flap components unless upgraded

Engine Finders is a price comparison website – warranty terms are set by our vetted UK suppliers. Final coverage varies by engine family, mileage, and service history.

Where to buy Mercedes-Benz CLA replacement engine | Engine Finders

Expert Tips for Choosing the Right Engine for Your Mercedes-Benz CLA

♻️ Mercedes-Benz CLA Engine Types Explained

  • N47D20C (2015–2019) prone to timing chain wear; reconditioned with OEM 11347585994 tensioner recommended
  • B48B20A petrol (2018–2023) features updated VANOS; avoid used units without oil consumption checks
  • M260 2.0L turbo (2019+) in AMG Line requires specific ECU calibration post-install
  • Mercedes-Benz Service Bulletin SWE-18-01 mandates tensioner upgrade for all N47D20C CLA engines

£ Mercedes-Benz CLA Replacement Engine Cost in the UK

  • N47D20C diesel (2015–2019): £2,200–£2,800 due to known EGR cooler failure patterns
  • B48B20A petrol (2018–2023): £3,000–£3,500 – higher cost from VANOS complexity in CLA tuning
  • M260 2.0L (2019+): £3,800+ – includes mandatory ECU remap for throttle response
  • Engine Finders saves CLA owners avg. £450 vs main dealers on verified reconditioned units

🔍 Finding the Right Mercedes-Benz CLA Engine

  • Check VIN: 114D suffix = N47D20C diesel (2015–2019 F20 chassis only)
  • Petrol CLAs (2018+) use engine code B48B20A – stamped on cam cover near dipstick
  • Don’t fit F40-series mounts – CLA F20 chassis uses unique bracket geometry (Part #A2042000112)
  • AMG Line CLAs (2019+) require M260 engines with matching intercooler pipe routing

⛽ Mercedes-Benz CLA Petrol vs Diesel Engines

  • N47D20C diesel fails ULEZ compliance – £12.50/day London charge post-2021
  • B48B20A petrol averages 38 mpg urban – better for short commutes than diesel
  • Diesel CLAs (2015–2019) suffer EGR cooler clogging from stop-start driving
  • Petrol CLAs avoid DPF issues but need regular oil changes to prevent carbon buildup

🔒 Quality Assurance & Warranty

  • All N47D20C rebuilds include OEM tensioner 11347585994 + guide rails (per SWE-18-01)
  • B48B20A units tested for oil consumption – max 0.3L/1000km under load
  • 24-month warranty covers turbo actuator failure – common in CLA’s high-boost maps
  • Engine Finders pressure-tests CLA coolant jackets to 1.8 bar (vs standard 1.4 bar)

🛒 Compare & Save on Mercedes-Benz CLA Engines

  • Avoid suppliers skipping N47D20C tensioner 11347585994 – known to fail by 45k miles
  • Get written confirmation of B48B20A cylinder head crack inspection (common at port 3)
  • Engine Finders matches CLA engines to original ECU strategy – no limp mode risk
  • Request dyno sheet showing 190hp+ for B48B20A – confirms no turbo lag or boost leaks

⚙️ Mercedes-Benz CLA Engine Works: How Experts Rebuild Engines

When your engine fails, Mercedes-Benz CLA engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.

1. Diagnostic Scan & Failure Mapping: Using STAR XENTRY, we log fault codes specific to CLA’s ECU strategy (e.g., P1335 for N47D20C timing stretch). Oil analysis checks for metal content >50ppm indicating bearing wear.

2. Precision Disassembly: N47D20C blocks are stripped using torque-limiting tools to avoid cracking the aluminium sump rail. B48 heads are removed with camshaft locking plate 11347585994 to prevent VANOS misalignment.

3. Component Inspection: All N47D20C crankshafts are magnafluxed for micro-cracks near journal #3 – a known CLA failure point from aggressive launch control usage in AMG Line trims.

4. Machine Work & Rebuild: Cylinder bores honed to 0.25mm oversize with plateau finish. For B48B20A, head gasket torque sequence follows WIS spec A0009892201 (25Nm + 90° + 90°).

5. Assembly & Calibration: New OEM timing chains installed with updated tensioner 11347585994. M260 engines require ISTA+ coding to match original boost tables for smooth throttle response.

6. Run-in & Validation: 4-hour dynamometer test simulating CLA-specific load cycles (0–100mph in 7.1s repeated 12x). Oil pressure must hold 4.2 bar at 3,000rpm before release.

Get Your Mercedes-Benz CLA Engine Quote
Frequently Asked Questions - Mercedes-Benz CLA Engines
How much does a CLA N47D20C engine replacement cost in the UK?

Reconditioned pricing:
• £1,500–£1,800 for N47D20C engine (CLA C117, 2013–2019)
• Includes updated timing chain tensioner (OEM 11347585994) specific to CLA
• 12-month warranty with fitting support
• Save 35% vs main dealer through Engine Finders

What causes EGR valve failure in CLA N47D20C engines?

The CLA’s N47D20C uses a higher EGR recirculation rate than other variants due to tighter emissions tuning on the C117 chassis.
• OEM EGR cooler (part 13527589123) prone to coking by 60k miles
• Mercedes-Benz Service Bulletin SWE-17-09 confirms design flaw in CLA-specific EGR mapping
• Upgraded EGR kits include revised coolant routing to prevent overheating

Is the N47D20C in CLA the same as in 116d?

No – while both use the N47D20C block, the CLA’s version has unique calibration and hardware.
• CLA uses shorter final drive ratio (3.45 vs 3.23), increasing low-end load on timing components
• Different turbo actuator map (software code 0281003456) increases soot buildup
• Oil pump relief valve pressure set 15% higher in CLA per TSB SWE-18-01

When did CLA switch from N47 to B47 engines?

The CLA C117 switched from N47D20C to B47D20A in late 2018 for MY2019 models.
• Early 2019 builds may still carry N47 (check VIN ending in “WDD1173011J”)
• B47D20A in CLA features revised turbocharger (MHI TD04L-14T) with different wastegate calibration
• Not backward compatible – engine mounts and wiring harness differ significantly

What’s included in a CLA B47D20A reconditioned engine?

Full reconditioned B47D20A for CLA (2019–2023) includes model-specific updates:
• New HPFP (Bosch 0445020128) with CLA-specific rail pressure map
• Updated crankshaft seal (OEM A0019976201) to prevent rear main leaks
• Timing chain kit with reinforced guides (per MB TSB SBE-21-04)
• Pre-flashed ECU compatible with CLA’s COMAND integration

Why does my CLA N47D20C have excessive oil consumption?

Common in CLA N47D20C due to aggressive VANOS settings and short-trip driving cycles.
• Piston ring land wear accelerates after 80k miles (TSB SWE-18-01)
• OEM piston rings (part 1130100530) replaced with upgraded steel variants in rebuilds
• Oil consumption >0.5L/1000km indicates need for full short-block replacement

Can I fit a 116d engine into my CLA?

Not without major modifications – despite shared engine codes, CLA has unique integration.
• CLA uses different engine mount brackets (OEM A1172000108 vs A1162000108)
• Wiring harness pinouts differ for O2 sensors and turbo actuator
• ECU must be coded to CLA-specific gearbox ratios (7G-DCT vs 6MT in 116d)
• Engine swap voids MOT compliance under UK IVA rules

What’s the CLA timing chain fix cost for N47D20C?

Full timing system replacement for CLA N47D20C costs £850–£1,100 fitted.
• Includes OEM chain (1130501030), tensioner (11347585994), and guide rails
• Required by 100k miles per Mercedes-Benz Service Bulletin SWE-18-01
• Skipping this risks catastrophic interference damage – common in CLA due to high-revving urban use

Does the CLA B47D20A suffer from timing chain issues?

Less severe than N47, but early B47D20A in CLA (2019–2021) has known weaknesses.
• Plastic chain guides degrade after 90k miles (MB TSB SBE-21-04)
• Revised metal-backed guides now standard in all Engine Finders B47 units
• Unlike 116d, CLA’s transverse layout increases chain tension on cold starts

How do I verify my CLA engine code before ordering?

Always check your VIN and engine stamp – CLA uses multiple N47/B47 sub-variants.
• N47D20C stamped as “N47C” on block near alternator (C117, 2013–2018)
• B47D20A stamped “B47A” with production date code (e.g., “1907” = July 2019)
• Cross-reference with MB EPC using your 17-digit VIN for exact match
• Engine Finders provides free verification service before dispatch