BMW 4 Gran Coupe (G26) i4 xDrive40 401 hp Parts
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What to check for this exact BMW 4 Gran Coupe (G26) i4 xDrive40 401 hp
This page is for the BMW 4 Gran Coupe (G26) i4 xDrive40 401 hp, manufactured from 07/2024. The recorded electric powertrain is i4 xDrive40 with an output of 401 hp. These details separate this vehicle from other power outputs, production splits and body styles that can share a BMW model and engine description.
An exact vehicle selection removes much of the uncertainty found on a broad model page, but it is not a substitute for the complete product application. Confirm the VIN or registration result, production month, drive unit, driven wheels, steering position and factory equipment whenever the product notes require them. Brake packages, suspension options, electrical connectors, thermal-management equipment and component position can still divide parts within one exact vehicle.
How to use this exact vehicle page
- Confirm that BMW 4 Gran Coupe (G26) i4 xDrive40 401 hp matches the vehicle being repaired.
- Choose a compatible category shown on this page.
- The next page keeps this exact vehicle selected.
- Compare any remaining axle, side, dimension, production or equipment choices.
- Read the complete manufacturer application and fitting notes before ordering.
The categories shown for this vehicle retain the selected application, but individual choices can still vary by component, production split and specification.
Compatible categories recorded for this vehicle
- Brake Discs
- Brake Pads
- Anti-roll bar links
- Brake Pad Wear Sensor
- Cabin Filter
- Suspension Arms
- Tie Rod End
- AC Compressor — 1 catalogue match
- Radiator — 1 catalogue match
Main systems and compatibility checks
| System | Typical components | Checks before ordering |
|---|---|---|
| Brakes | Discs, pads, sensors, hoses, calipers and fitting hardware | Axle, disc dimensions, caliper design, wear-sensor arrangement and paired replacement requirements. |
| Suspension and steering | Arms, bushes, dampers, springs, joints, mounts and bearings | Axle load, standard or sport setup, driven wheels, side, mounting design and alignment procedure. |
| Routine service items | Cabin filters, wiper parts, brake components, tyres and lighting | Exact dimensions, axle or side, electrical rating, production split and supplied hardware. |
| Thermal management | Coolant pumps, radiators, valves, hoses, sensors and air-conditioning parts | Drive-unit and battery circuit, connection layout, coolant specification, refrigerant procedure and bleeding method. |
| Electrical control and sensors | Temperature, wheel-speed, position and pressure sensors, switches and control wiring | Connector, location, system revision, wiring condition, diagnostic evidence and any coding or calibration requirement. |
| Electrical and lighting | Lamps, switches, regulators, motors, 12-volt supply and charging interfaces | Electrical rating, connector, market, steering side, body location, control system and coding needs. |
| Drive unit and final drive | Mounts, shafts, bearings, seals and drive-unit service parts | Exact drive layout, assembly identity, dimensions, mounting design, approved fluid and filling procedure. |
Confirm compatibility from evidence, not appearance
Use the vehicle lookup as the starting point, then compare the complete replacement reference, dimensions, material, connector, mounting points and any supplied hardware. Product photographs can help identify a general design but are not final compatibility proof. A component that looks similar can differ in pressure rating, calibration, axle position, electrical pinout or installation depth.
Production dates should be read together with the VIN and product notes. A part listed “from” or “to” a month may sit close to a factory change, so compare the installed reference when more than one option is listed. Superseded references can be valid, but the replacement chain and technical notes must agree with the exact application.
Brakes, steering and suspension
For brake parts, confirm the axle, disc diameter, thickness, height, hub dimensions, caliper and wear-sensor arrangement. Inspect hub faces, sliders, hoses, bearings and tyres when diagnosing vibration or pulling. Friction and paired axle components are normally serviced as balanced sets where the repair information requires it. A red brake warning, fluid loss, grinding or materially reduced braking performance needs immediate assessment.
Suspension and steering noises can travel through the body and may involve more than the most visible joint. Check arms, bushes, links, springs, dampers, mounts, bearings, steering joints, wheels and tyres under the correct loading conditions. Alignment is normally completed after work that changes geometry, but alignment cannot compensate for worn joints, damaged wheels or an incorrect ride height.
Electric powertrain and routine service
Service requirements for this electric BMW application include brakes, tyres, cabin filtration, wipers, lighting, suspension, thermal-management circuits, the 12-volt electrical system and the drive unit. Use the exact vehicle schedule and product application because component dimensions, connectors and system revisions can change during production.
High-voltage components and orange cables require the specified isolation, test equipment and personal protective measures. Do not touch damaged high-voltage parts or attempt work beyond your training. Battery, drive-unit, charging and thermal-management faults should be diagnosed from saved fault information and the manufacturer procedure by a suitably qualified technician.
Cooling, heating and fluid safety
Inspect the cooling circuit as a connected system. The radiator, expansion tank, cap, thermostat, water pump, hoses, flanges, fan and heater circuit can influence the same symptom. Never open a hot pressurised system. Use the specified coolant chemistry and mixture and follow the prescribed filling and bleeding procedure; trapped air or an unresolved leak can cause unstable temperature or repeat overheating.
| Item | Confirm before use | Why it matters |
|---|---|---|
| Thermal-management coolant | Approved chemistry, circuit, mixture, cleanliness and bleed procedure | Battery, drive-unit and cabin-heating circuits can have distinct requirements. |
| Coolant | Approved chemistry, mixture, cleanliness and bleed procedure | Incorrect mixing or trapped air can reduce protection and cooling reliability. |
| Brake fluid | Specified grade, condition and safe bleeding method | Moisture lowers boiling performance and any fluid loss is safety-critical. |
| Drive-unit and final-drive fluids | Exact assembly identification, approval, temperature and level procedure | Drive units and final drives can use different lubricants and filling methods. |
| Fasteners and seals | Correct part, single-use status, torque and angle sequence | Incorrect reuse or tightening can damage threads, joints and sealing faces. |
Materials, construction and installed specification
| Part area | Construction details to compare | Reason for checking |
|---|---|---|
| Brake friction and discs | Friction formulations and iron, composite or application-specific disc construction | Use an approved matched application; material affects heat behaviour, wear, noise and bedding. |
| Suspension and steering | Steel, aluminium, rubber, hydraulic bushes and engineered polymers | Material alone does not prove interchangeability; geometry, stiffness and joint design must match. |
| Seals, hoses and belts | Application-specific elastomers, reinforced rubber and thermoplastics | Fluid, temperature and pressure compatibility matters more than appearance or colour. |
| Filters | Cellulose, synthetic or combined media with rubber or moulded seals | Match housing, dimensions, flow direction, filtration specification and seal arrangement. |
| Electrical components | Copper conductors, electronic sensing elements, sealed housings and defined connector systems | Pinout, calibration, temperature range and environmental sealing must suit the exact position. |
BMW 4 Gran Coupe (G26) i4 xDrive40 401 hp is already narrowed to an exact engine and power entry, but material or construction wording still cannot replace the application. Compare the installed reference, dimensions, mounting points, connector, axle or side and any option note. Coupé doors, glass, seals and some body fittings may differ from the related saloon or convertible. Mechanical parts also remain subject to engine, axle, production and equipment splits.
Fault symptoms and urgency
| Symptom | Possible areas | Action |
|---|---|---|
| Grinding, strong pulling or major brake vibration | Friction parts, calipers, hoses, hubs, bearings or tyres | Stop using the vehicle if braking is impaired and arrange immediate inspection. |
| Red temperature warning, steam or rapid coolant loss | Leak, pump, thermostat, fan, radiator, tank or hose | Stop safely, switch off and do not open the hot system. |
| Heavy steering, sudden play or fluid loss | Steering joints, rack, assistance system, hoses or tyres | Inspect urgently and do not continue if control is affected. |
| Drive-system or charging warning | High-voltage battery, drive unit, charging system, thermal management, wiring or control electronics | Save diagnostic information, follow the manufacturer safety procedure and arrange qualified assessment promptly. |
| Knocking or unstable handling | Arms, bushes, links, springs, dampers, mounts or bearings | Inspect promptly and correct mechanical faults before alignment. |
| Repeatedly discharged 12-volt battery | Battery condition, DC-DC supply, wiring, grounds or parasitic load | Test the complete low-voltage supply and charging control before replacing parts. |
Maintenance and repair workflow
- Record the VIN, production month, installed reference, symptoms and diagnostic evidence.
- Confirm i4 xDrive40, 401 hp and the 4 Gran Coupe (G26) body series.
- Review product exclusions, production splits, equipment restrictions and supersessions.
- Inspect connected components and identify the cause of the original fault.
- Fit with suitable tools, clean working methods, new seals and the stated torque procedure.
- Complete required bleeding, alignment, coding, adaptation or calibration.
- Verify levels, leaks, warning lamps, noise and safe operation before normal road use.
Common mistakes to avoid
- Choosing from the model and engine description without confirming the exact electric powertrain and output.
- Using a photograph, diameter or connector as the only fitment check.
- Ignoring axle, side, steering position, gearbox, driven wheels or production-date notes.
- Mixing fluids by colour or broad universal wording instead of approval.
- Replacing a sensor without testing wiring, supply voltage and the related mechanical system.
- Fitting a new component without correcting contamination, overheating, low voltage or misalignment that caused the failure.
- Skipping alignment, bleeding, coding or calibration after a repair that requires it.
UK MOT, legal and safety notes
The UK MOT checks relevant braking, steering, suspension, tyre, lighting, visibility and restraint items, but it is not a substitute for servicing or a complete compatibility inspection. A component can be worn, leaking or near its limit without an MOT pass guaranteeing future condition. Complete required calibration and verify safe operation after repair.
Lighting, suspension, wheel and performance modifications can affect road legality, insurance, clearance and handling. Use components suitable for road use and complete any required coding or calibration. Safety-critical, refrigerant, restraint, high-current electrical and high-voltage work should be handled or checked by a suitably competent technician.
BMW 4 Gran Coupe (G26) i4 xDrive40 401 hp FAQs
Q: Is this page for every i4 xDrive40?
A: No. It is specific to the i4 xDrive40 electric powertrain, 401 hp and the stated production period.
Q: Are the category links already vehicle-filtered?
A: Yes. Each destination retains this exact vehicle selection.
Q: Can registration lookup be used alone?
A: Use it as a starting point, then confirm the VIN, build details and product-specific notes.
Q: Are product photographs final fitment proof?
A: No. Match the complete application, reference, dimensions, connections and technical notes.
Q: Why can two variants with the same power need different parts?
A: Battery, drive-unit, software, driven wheels, production revision and factory equipment can differ.
Q: Should diagnostic codes be cleared before testing?
A: No. Save codes and operating context first, then test the affected system.
Q: Does an MOT pass confirm every service item?
A: No. It does not verify complete maintenance, fluid specifications or every compatibility detail.
Q: When should the vehicle not be driven?
A: Stop for impaired brakes or steering, serious fluid leaks, overheating, severe looseness or red safety warnings.
Q: Can a universal fluid be used?
A: Only when it explicitly meets the exact approval and procedure required for the assembly.
Q: When is professional fitting advisable?
A: Use a suitably competent technician for safety-critical, refrigerant, fuel, restraint, coding, calibration or high-voltage work.
