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Opel · Known Issues

2015 Opel Mokka Problems: 7 Known Issues

2015 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2015 Opel Mokka has 7 documented known issues, with 2 rated critical. The most serious are Mokka A 1.7 CDTI Water Pump / Timing Belt Drive ($700-$3,000 repair) and 1.4 Turbo Timing Chain Stretch / Cold-Start Rattle (A14NET/B14NET) ($600-$1,800 repair). Across all issues with published estimates, repair costs range from $150 to $3,000. DIY maintenance guides at au7o.io.

In This Article

  • Mokka Cooling1
  • Mokka Engine1
  • Mokka Emissions1
  • Mokka Exhaust1
  • Mokka Transmission1
  • Mokka HVAC1
  • Mokka Electrical1
  • FAQ
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In This Article

  • Cooling1
  • Engine1
  • Emissions1
  • Exhaust1
  • Transmission1
  • HVAC1
  • Electrical1
  • FAQ

All 7 Known Issues

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On the 2012-2019 Opel Mokka 1.7 CDTI (A17DTS), the 1.7 CDTI water pump is timing-belt-driven in this engine. When the pump seizes or its impeller fails, the timing belt can be ejected — leading to valve damage. Failure typically appears between 80,000-130,000 km, often before the recommended belt service.

This issue also affects: Opel Vivaro

Common Symptoms

  • coolant weep
  • belt area noise
  • sudden engine stall
  • no compression after pump seize

How to Fix

Replace water pump WITH timing belt as a kit (€700-€1,100) rather than belt alone. Catastrophic pump failure with belt jump means head rebuild (€2,500+). Do the kit early if there's any whining or weeping from the pump.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • DAYCO KTBWP5310 water-pump and timing-belt kit

    Confirm VIN/chassis before purchase.

    eBay UK

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$700 - $3,000

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Medium Confidence

On the 2013-2019 Opel Mokka 1.4 Turbo petrol (A14NET / B14NET, GM Family 0), the 1.4 Turbo petrol (GM Family-0, A14NET/B14NET) fitted to the first-gen Mokka and Mokka X suffers from timing-chain stretch and tensioner/guide wear, often appearing from around 80,000-100,000 km. A stretched chain alters valve timing and, if it skips, can cause serious internal engine damage. The classic symptom is a metallic rattle for a few seconds on cold start. Owners on the Mokka Owners Club report needing chain, tensioner and sometimes turbo/water-pump work, with cars off the road for extended periods. Cars used mostly for short trips and frequent stop-start cycles tend to wear faster.

This issue also affects: Opel Astra, Opel Combo, Opel Corsa

Common Symptoms

  • Metallic rattle on cold start
  • Rough idle
  • Loss of power
  • Engine warning light
  • Timing/cam correlation fault

How to Fix

Diagnose chain stretch via crank/cam correlation and cam-timing fault codes; replace the timing chain, tensioner, guides and sprockets as a kit, using genuine/quality parts and the correct oil and service intervals to prevent recurrence. Address any related turbo or water-pump wear at the same time while the front is apart.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • FAI TK247A timing-chain kit for A14NET/B14NET

    Confirm VIN and inspect sprockets/VVT hubs; the basic kit does not include every gear.

    eBay UK

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$600 - $1,800

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2015-2019 Opel Mokka 1.6 CDTI diesel (B16DTH / B16DTU), the 1.6 CDTI diesel (B16DTH/B16DTU, 'Whisper Diesel') in the Mokka X is prone to heavy carbon build-up in the EGR valve, EGR cooler and intake, especially on city-driven cars. The ECU infers EGR flow from the MAF signal, so any restriction triggers P0401 (insufficient EGR flow) and rough running or limp mode. A separate failure is the vacuum-operated EGR-cooler bypass-flap actuator, whose spindle can snap. Forum reports (Mokka Owners Club) document recurring P0401, often combined with MAF/MAP faults.

This issue also affects: Opel Astra, Opel Insignia, Opel Zafira

Common Symptoms

  • Engine warning light
  • Rough running / hesitation
  • Limp mode
  • Reduced power
  • Increased fuel consumption

How to Fix

Remove and ultrasonically clean the EGR valve, throttle body and intake pipe; in many cases the EGR cooler is fully clogged or the bypass flap is broken and must be replaced. Verify MAF/MAP sensors and vacuum lines. Regular motorway runs and good-quality diesel reduce recurrence.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine GM 55509027 complete EGR cooler assembly

    Confirm VIN, engine code and OE number.

    AUTODOC

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$150 - $700

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2013-2019 Opel Mokka, on the CDTI diesel Mokka/Mokka X driven mainly on short city journeys, the DPF cannot reach the temperature needed for passive/active regeneration and progressively clogs with soot, often as early as 30,000-50,000 km. This produces reduced power, increased fuel use, repeated regeneration warnings and exhaust aftertreatment fault codes; a blocked DPF that never completes regeneration eventually needs forced regen or replacement. The issue is tightly linked to the EGR carbon problem on the same engines.

This issue also affects: Opel Astra, Opel Combo

Common Symptoms

  • DPF / particulate filter warning light
  • Reduced power
  • Black smoke from exhaust
  • Increased fuel consumption
  • Frequent failed regenerations

How to Fix

Take the car on regular sustained motorway drives to allow active regeneration; when clogged, perform a forced (static) regeneration with a diagnostic tool or professional DPF clean. A failed/blocked filter must be replaced. Fix any underlying EGR, injector or sensor faults that prevent successful regen.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Cats2U VX6162T catalyst and DPF for Mokka 1.6 CDTI

    Confirm B16/D16 engine, emissions level, drive layout, VIN and OE references.

    Cats2U
  • DPF-G9096 replacement filter for Mokka 1.7 CDTI A17DTS

    Confirm VIN and FWD/AWD homologation.

    DPF-Catalysts24

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$200 - $1,500

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2013-2019 Opel Mokka, first-gen Mokka and Mokka X manual diesels (1.6/1.7 CDTI) commonly develop a metallic rattling or ringing noise from the bellhousing area, most noticeable at idle when warm or on the over-run. The cause is wear of the dual-mass flywheel's internal damper springs, sometimes accompanied by clutch judder on take-up. In advanced cases the pedal can stick and start-up becomes noisy. It is frequently misdiagnosed as an engine noise.

Common Symptoms

  • Metallic rattle/ringing from bellhousing at idle
  • Noise fades when clutch pressed
  • Clutch judder on pull-away
  • Vibration
  • Noisy/rough start-up

How to Fix

Confirm DMF wear (excess rotational free-play, characteristic rattle) and replace the dual-mass flywheel; because the gearbox must come out, the clutch kit (and often the slave cylinder) is replaced at the same time to avoid duplicate labour.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • SACHS 2290 601 239 complete clutch and dual-mass-flywheel module

    Confirm VIN, engine, M32 transmission, drive layout and OE numbers.

    iParts
  • LuK 600 0308 00 RepSet DMF clutch kit for Mokka 1.7 CDTI

    Confirm A17DTS, VIN, M32 transmission, drive layout and OE numbers.

    CarParts247

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$800 - $1,600

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2014-2019 Opel Mokka, the Mokka/Mokka X air-conditioning system frequently loses cooling performance at relatively low mileage. Common root causes are a leaking condenser (mounted low at the front and vulnerable to stone damage and corrosion), a defective expansion valve, or a failing compressor; 2018-build cars are noted as particularly affected. Owners report the system going empty repeatedly after being regassed, indicating an active refrigerant leak.

Common Symptoms

  • Warm air from vents
  • Weak/insufficient cooling
  • Refrigerant goes empty after regas
  • Compressor noise
  • Interior moisture/fogging

How to Fix

Leak-test the system (UV dye / electronic sniffer / nitrogen pressure test) to locate the leak; replace the condenser, expansion valve or compressor as required, evacuate and recharge with the correct refrigerant and oil. Replacing the receiver/drier is recommended when the system is opened.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Denso DCN15005 A/C condenser with receiver-drier

    Confirm VIN and underhood refrigerant label.

    IC24 UK
  • Nissens 940390 A/C condenser

    Confirm VIN, engine, OE 1850274 family, dimensions and refrigerant before purchase.

    eBay UK

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$200 - $900

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2013-2020 Opel Mokka, combustion-engine Mokka/Mokka X owners frequently report the Start-Stop system ceasing to function alongside a flat or weak 12V battery, sometimes after the car stands for a week or two. The AGM/EFB battery and its state-of-charge management are central: when voltage dips below roughly 11.6V the ECU disables Start-Stop and can lose learned parameters. Some cases are simple battery wear or a marginal alternator, but persistent parasitic drains (modules not sleeping) have left some cars repeatedly going flat even after battery replacement.

Common Symptoms

  • Start-Stop not working / warning message
  • Flat battery after standing
  • Slow/no crank
  • Repeated battery replacement without fixing drain
  • Electrical glitches

How to Fix

Test the battery and alternator first and fit the correct AGM/EFB battery with proper coding/registration; if drain persists, perform a parasitic-draw test to find the module/circuit staying awake and repair it. Ensure software is up to date.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • CTEK CS ONE 12 V AGM/EFB-compatible charger and maintainer

    12 V AGM/EFB and other supported chemistries, 3-180 Ah. Identify the installed battery and follow Opel's designated terminals and voltage restrictions.

    CTEK

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$150 - $500

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026
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Frequently Asked Questions

What are the most common Opel Mokka problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2015 Opel Mokka has 7 documented issues. The most frequently reported are: Mokka A 1.7 CDTI Water Pump / Timing Belt Drive, 1.4 Turbo Timing Chain Stretch / Cold-Start Rattle (A14NET/B14NET), 1.6 CDTI EGR Valve & Cooler Carbon Clogging (P0401). Of these, 2 are rated critical and should be addressed promptly.

Is the Opel Mokka reliable?

The 2015 Opel Mokka has 7 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Mokka A 1.7 CDTI Water Pump / Timing Belt Drive and 1.4 Turbo Timing Chain Stretch / Cold-Start Rattle (A14NET/B14NET). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Opel Mokka problems?

Repair costs for known Opel Mokka issues range from $150 to $3,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Mokka A 1.7 CDTI Water Pump / Timing Belt Drive, typically costs $700-$3,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2012-2019 Opel Mokka Mokka A 1.7 CDTI Water Pump / Timing Belt Drive?

The 1.7 CDTI water pump is timing-belt-driven in this engine. When the pump seizes or its impeller fails, the timing belt can be ejected — leading to valve damage. Failure typically appears between 80,000-130,000 km, often before the recommended belt service. Repairs typically run $700-$3,000. Severity: high.

What is the 2013-2019 Opel Mokka 1.4 Turbo Timing Chain Stretch / Cold-Start Rattle (A14NET/B14NET)?

The 1.4 Turbo petrol (GM Family-0, A14NET/B14NET) fitted to the first-gen Mokka and Mokka X suffers from timing-chain stretch and tensioner/guide wear, often appearing from around 80,000-100,000 km. A stretched chain alters valve timing and, if it skips, can cause serious interna… Repairs typically run $600-$1,800. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

What is the 2015-2019 Opel Mokka 1.6 CDTI EGR Valve & Cooler Carbon Clogging (P0401)?

The 1.6 CDTI diesel (B16DTH/B16DTU, 'Whisper Diesel') in the Mokka X is prone to heavy carbon build-up in the EGR valve, EGR cooler and intake, especially on city-driven cars. The ECU infers EGR flow from the MAF signal, so any restriction triggers P0401 (insufficient EGR flow) a… Repairs typically run $150-$700. Severity: medium.

What is the 2013-2019 Opel Mokka Diesel Particulate Filter (DPF) Clogging & Failed Regeneration?

On the CDTI diesel Mokka/Mokka X driven mainly on short city journeys, the DPF cannot reach the temperature needed for passive/active regeneration and progressively clogs with soot, often as early as 30,000-50,000 km. This produces reduced power, increased fuel use, repeated rege… Repairs typically run $200-$1,500. Severity: medium.

What is the 2013-2019 Opel Mokka Dual-Mass Flywheel Rattle / Clutch Judder (Manual Diesel)?

First-gen Mokka and Mokka X manual diesels (1.6/1.7 CDTI) commonly develop a metallic rattling or ringing noise from the bellhousing area, most noticeable at idle when warm or on the over-run. The cause is wear of the dual-mass flywheel's internal damper springs, sometimes accomp… Repairs typically run $800-$1,600. Severity: medium.

What is the 2014-2019 Opel Mokka Air Conditioning Condenser Leak / Compressor Failure?

The Mokka/Mokka X air-conditioning system frequently loses cooling performance at relatively low mileage. Common root causes are a leaking condenser (mounted low at the front and vulnerable to stone damage and corrosion), a defective expansion valve, or a failing compressor; 2018… Repairs typically run $200-$900. Severity: medium.

What is the 2013-2020 Opel Mokka Start-Stop System Malfunction / 12V Battery Parasitic Drain (ICE)?

Combustion-engine Mokka/Mokka X owners frequently report the Start-Stop system ceasing to function alongside a flat or weak 12V battery, sometimes after the car stands for a week or two. The AGM/EFB battery and its state-of-charge management are central: when voltage dips below r… Repairs typically run $150-$500. Severity: low.