Engine RepairBMW

BMW Engine Repair in Vantaa

Sheer driving pleasure without timing-chain worries.

BMW engines balance performance with a refined soundtrack. We focus on the problems that cause BMW owners the most headaches: timing chains, Valvetronic and Vanos systems, and the classic oil leaks. We diagnose the root cause — we don't guess.

BMW engine repair at STG Autohuolto

Engine families we service

N47 DieselN20/N26N54/N55N63 V8B47/B48S65/S85 M
STG mechanic working on a BMW engine
Known faults

BMW

BMW — known engine faults we repair

Every brand has weak spots. These are the BMW faults we know best — diagnosed, documented and repaired with OE-quality parts.

  1. N47 diesel timing chain failure

    Symptom

    Rattling or hissing noise from the rear of the engine (flywheel end), oil pressure warning light.

    Our fix

    The chain sits at the back of the engine — requires engine removal. We replace the complete chain kit with guides before it jumps and destroys the engine.

  2. N20/N26 oil pump chain plastic guide

    Symptom

    Rattling noise from the front of the engine, low oil pressure, possible warning light at operating temperature.

    Our fix

    The plastic guide becomes brittle and fails over time. We replace the oil pump chain kit with updated parts before the engine bearings are damaged.

  3. Valve cover and oil filter housing leaks

    Symptom

    Smell of oil in the engine bay, oil staining around the timing cover, oil consumption with no visible smoke.

    Our fix

    We replace valve cover and oil filter housing gaskets — the most common oil leak point on all N-series engines.

  4. S65/S85 M engine rod bearings

    Symptom

    Metallic knocking under load, metal particles in oil, low oil pressure.

    Our fix

    Pre-emptive rod bearing replacement on M3/M5 engines at ~100,000 km is much cheaper than a full engine rebuild. We use updated bearings.

PricingBMW

BMW engine jobs — starting prices

Market-average prices for BMW vehicles in Finland. Final price depends on engine model and parts availability — we always give you a fixed quote before any work starts.

from 1120 €

Engine Replacement

Replacing a faulty engine with a new or reconditioned unit. Comprehensive work with warranty.

from 1059 €

Head Gasket Replacement

Replacing a worn or leaking head gasket. Prevents coolant mixing with engine oil.

from 995 €

Timing Chain Replacement

Replacing the timing chain, sprockets, and tensioners. Prevents serious engine damage.

from 1480 €

BMW

Timing Belt Replacement

Replacing timing belt, tensioner pulley and water pump. Prevents costly engine damage.

from 990 €

Cylinder Head Replacement

Replacing a damaged cylinder head. Repairs damage caused by overheating.

from 1015 €

BMW

Turbocharger Replacement

Replacing a faulty turbocharger. Restores engine power and performance.

from 947 €

Turbocharger Service

Servicing and inspecting the turbocharger. Extends turbo lifespan and maintains performance.

from 847 €

Crankshaft Replacement

Replacing a faulty crankshaft. Complex engine repair work carried out professionally.

from 590 €

Oil Pump Replacement

Replacing a faulty oil pump. Ensures adequate oil pressure and engine lubrication.

from 330 €

BMW

Water Pump Replacement

Replacing a faulty water pump. Ensures proper coolant circulation and optimal engine temperature.

from 720 €

DPF Replacement

Replacing or cleaning the diesel particulate filter (DPF). Clears fault codes and restores performance.

from 400 €

BMW

DPF Cleaning (Particulate Filter)

A mechanical DPF clean restores filter flow to near-new condition without the cost of replacing the part.

from 332 €

BMW

EGR Valve Replacement

Replacing or cleaning the EGR valve. Improves engine performance and reduces emissions.

from 290 €

Intake Manifold Cleaning

Cleaning a clogged intake manifold. Improves engine breathing and performance.

from 250 €

BMW

Spark Plug Replacement

Replacing spark plugs according to manufacturer schedule. Improves engine running and reduces fuel consumption.

from 299 €

BMW

Glow Plug Replacement

Replacing diesel engine glow plugs. Ensures reliable cold-weather starting.

Diagnostics

How we diagnose BMW engine faults

First we isolate the root cause, then we choose the repair. That avoids unnecessary parts and makes the estimate reliable.

Brand-specific fault-code and live-data check

We start with diagnostics matched to N47 Diesel, N20/N26, N54/N55, N63 V8 engines. Fault codes and live data are compared against the symptom so we separate an electrical issue from mechanical damage before ordering parts.

Compression, leak-down and pressure tests

If the symptom points to a fault such as n47 diesel timing chain failure, we measure compression, leak-down and coolant or boost pressure. That confirms whether the fault is in the head, timing system, piston rings or an ancillary component.

Endoscope and visual inspection

When needed, we inspect the cylinders with an endoscope, check leaks, carbon build-up and crankcase ventilation, then document the findings before you approve the repair.

Repair scope

BMW engine repair from small faults to full rebuilds

Timing system and valve-train repairs

We repair faults such as n20/n26 oil pump chain plastic guide by replacing chains, belts, tensioners, guides and required seals as one controlled package.

Oil consumption, smoke and compression repairs

When the fault is in piston rings, valve-stem seals or the head gasket, the repair follows the root cause. We do not mask symptoms with additives; worn parts are repaired or renewed.

Ancillaries, turbochargers and emissions systems

We also diagnose faults such as valve cover and oil filter housing leaks, EGR, DPF, water pump, turbo and fuel-system issues before recommending an unnecessarily large engine repair.

Repair or replacement engine

Repair is often safer than an unknown replacement engine

A repaired engine is known inside out

A used replacement engine can carry the same model-specific fault as the failed one. In a repair, wear parts, seals and risk points are inspected and documented.

Lower risk when the damage is scoped correctly

After diagnosis we compare repair, partial repair and replacement-engine costs. If an engine swap is the better route, we say so directly.

Warranty on labour and installed parts

The repair uses OE-quality parts and a written estimate. You get a clear repair scope, not just an unknown used component.

Price and scope

BMW engine repair pricing depends on diagnosis

The starting price is a baseline, not a guess

A full engine rebuild starts from EUR 1,999 on common four-cylinder engines. The final price depends on engine code, damage scope and parts availability.

Individual jobs are priced separately

If a full rebuild is not needed, the cards below show typical engine jobs such as timing belt, head gasket, EGR, turbo and water pump work.

Work starts only after approval

After diagnosis you receive a written estimate. We start only once scope, price and schedule are clear to you.

BMW

See the full BMW service pricing

From oil changes to timing belts — every BMW service package with transparent pricing and a 24-month warranty.

FAQ

BMW engine repair — frequently asked

I have an N47 engine — should I be worried?

If the chain hasn't been done, you're in the risk zone. We recommend an inspection and, if needed, a pre-emptive chain replacement — far cheaper than a destroyed engine.

Do you use genuine BMW parts?

We use either genuine BMW parts or quality OE-equivalent parts based on your preference. Both carry a warranty.

Do you have BMW diagnostic tools?

Yes. We use BMW INPA/ISTA-compatible equipment to read all ECUs, code components and perform adaptations just like a main dealer.