BMW Alternators
Mini Alternators

Alternator Testing, Alternator Repairs, Alternator Replacement

If you've got a suspected fault with the charging on your vehicle we can help with accurate diagnosis & complete repair solutions.

BMW Starter Motors
Mini Starter Motors

Starter Motor Testing, Starter Motor Repairs, Starter Motor Replacement

If you've got a suspected fault with the starter motor on your vehicle we can help with accurate diagnosis & complete repair solutions.

BMW Earthing Points
Mini Earthing Points

Earthing Point Checks, Earthing Point Refurbishment

If you've got a suspected fault with the earthing points on your vehicle we can help with accurate diagnosis & complete refurbishment to as new condition.

BMW Battery Testing
Mini Battery Testing

Battery Cell Test, Battery Status Check, Battery Charge Test

If you've got a suspected fault with the battery on your vehicle we can help with accurate diagnosis & complete repair solutions.

BMW Batteries
Mini Batteries

BMW AGM Battery Replacement, BMW Battery Replacement

If the battery is declared defunct, we can source, supply and install an OE Approved replacement and code it as is necessary for some models.

BMW IBS Leads
Mini IBS Leads

BMW Intelligent Battery System Faults, IBS Lead Problems

If you've got a suspected fault with the IBS system on your vehicle we can help with accurate diagnosis & complete repair solutions.

BMW Wiring
Mini Wiring

Wiring Fault Finding, Wiring Diagnostics, Wiring Repairs

If you've got a suspected fault with the wiring on your vehicle we can help with accurate diagnosis & complete repair solutions.

BMW Fuses & Relays
Mini Fuses & Relays

Fusebox Testing, Relay Checks, Fuse Renewal, Relay Renewal

If you've got a suspected fault with the fuses or relays on your vehicle we can help with accurate diagnosis & complete repair solutions.

BMW ECUs & Electronics
Mini ECUs & Electronics

ECU Testing, ECU Repairs, Electronic Repairs, In-House Electronics Lab.

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Starting & Charging Systems

Alternator Testing, Starter Motor Testing, Earthing Points
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BMW Starter Motor Problems

Most vehicles have an electric starter motor with a starter solenoid (similar to a relay). The most common things to go wrong are:

A low battery voltage and numerous attempts to start an engine will draw high current through the starter motor and can cause it to burn out. Replacing the starter motor without renewing the battery wil lead to a repeat failure.

If the electrical feed to the starter solenoid doesn't switch off once the engine starts, the starter motor can continue running causing a whining noise and a burning smell. The starter motor will overheat and likely burn out. Commonly known as Starter Over-Run.

The starter motor just clicks when the ignition key is turned, whilst this may be a failed starter motor solenoid, it is often just a poor connection from a broken or corroded cable or even worn earthing points.

BMW Starter Motor Diagnosis

If there's a suspected starter motor fault, the first stage is to carry out starter motor tests to determine if the motor really has failed.

If the starter motor has failed, determining the cause is essential to prevent replication of the failure with a new part fitted.

At DIAGNOSTICS.WALES, we will determine exactly what has happened and why and propose a complete repair solution.

BMW Starter Motor Repairs

We can source, supply and install an OE specification starter motor, either new or refurbished if required.

We would generally recommend earthing point refurbishment as a standard procedure when installing a replacement starter motor.

BMW Alternator Problems

The alternator is designed to keep the car battery fully charged, it is not designed to charge a flat battery. The most common things to go wrong are:

Auxillary belt problems cause incorrect alternator operation. An old, worn or failed belt is the most common issue although incorrectly tensioned belts also cause issues. A visual check will confirm belt status.

Testing the output of the alternator will confirm if there is an over or under charging issue.

If the alternator bearings and / or bushings are worn there is likely to be "growling" or "whining" noise evident.

BMW Alternator Diagnosis

If there's a suspected alternator fault, the first stage is to carry out alternator tests to determine if the motor really has failed.

If the alternator has failed, determining the cause is essential to prevent replication of the failure with a new part fitted.

BMW Alternator Repairs

We can source, supply and install an OE specification alternator, either new or refurbished if required.

We would generally recommend a battery test and earthing point refurbishment as standard procedure when installing a replacement alternator.

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Batteries & Intelligent Battery Systems

Battery Testing, AGM Batteries, IBS Leads, Battery Coding
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BMW Battery Problems

Most modern BMW vehicles have AGM Batteries installed and an Intelligent Battery System. AGM is an abbreviation for Absorbent Glass Mat and refers to a special design of battery where the electrolyte is stored in the mats.

The average AGM battery lifespan is 3 to 5 years. The replacement is more expensive than traditional battery types and requires professional installation with coding to the car.

IBS is an abbreviation for Intelligent Battery Sensor which is a mechanical electronic device connected directly to the negative battery terminal with the purpose of monitoring battery conditions and triggering a warning light if the measured data is outside the expected values.

A flat battery, battery warning light or other battery warning message can be identified and solved here at DIAGNOSTICS.WALES.

BMW Battery or IBS Diagnosis

If there's a suspected battery or IBS fault, the first stage is to carry out a battery test to determine the charge status of the battery.

If the battery has failed, determining the cause is essential to prevent replication of the failure with a new part fitted.

At DIAGNOSTICS.WALES, we will determine exactly what has happened and why and propose a complete repair solution.

BMW Battery or IBS Repairs

We can source, supply and install an OE specification AGM Battery, Standard Battery or IBS lead if required.

We would generally recommend earthing point refurbishment as a standard procedure when installing a replacement battery.

Wiring Looms

Resolving that dreaded elusive wiring fault or problem!
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What Causes Wiring Loom Problems?

1.

Heat / Spiking

An overvoltage surge can cause heat damage to a wiring loom or module. Extreme heat of any source may affect a wiring loom.

2.

Water Ingress

Blocked drainage channels or degraded seals can allow water to ingress where it shouldn't and track along a wiring loom.

3.

Corrosion

Age or water ingress can allow corrosion to develop in a wiring loom. This causes brittleness of the wires & unreliability.

4.

Rodents

Mice & other rodents find the materials in an engine bay perfect for nesting. Unfortunately they also love chewing wiring looms.

What Can Be Done About It?

Why choose Us?

Wiring TestsWiring Fault Finding

Confirm loom functionality with wiring loom testing. Identify faults & locate cause.

Why choose Us?

Wiring RepairsMinor Wiring Repairs

Repairs to small sections of loom damage with insertion of new wire professionally joined.

Why choose Us?

Wiring RemanufactureManufacture of Replacement Loom

Remanufacture of a replacement loom from scratch, if a new part is unavailable or economically unviable.

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