Ford Focus Mk2 2004-2011 PTC Auxiliary Heater Matrix 3M51-18K463-FD
Ford Focus Mk2 2004-2011 PTC Auxiliary Heater Matrix 3M51-18K463-FD
Ford Focus Mk2 2004-2011 PTC Auxiliary Electric Cabin Heater Matrix
The part you are buying
This listing is for the electric PTC auxiliary heater element shown below. It is installed within the vehicle's climate-control housing and provides rapid cabin heat while a cold diesel engine is still warming up.
Item details and engineering references
| Vehicle manufacturer | Ford |
| Primary application | Ford Focus Mk2 / C307-CB4, 2004-2011, where factory-fitted with the supplemental electric air-heater system |
| Reference body style pictured | Ford Focus Mk2 facelift five-door hatchback. The component itself does not prove the donor body style, so use the number and connector checks below. |
| Part type | PTC electric auxiliary cabin heater / electric booster heater element / auxiliary heater matrix |
| Engineering part number | 3M51-18K463-FD / 3M5118K463FD |
| Service / FINIS reference | 1727072 |
| Interchange part numbers | 3M51-18K463-FA, 3M51-18K463-FB and 3M51-18K463-FC appear in the same engineering family. They are not automatically interchangeable: compare connector keying, terminals, frame, dimensions and electrical specification. |
| Superseded part number | No safe blanket supersession claim is made. The complete engineering number and physical design should match the removed unit. |
| Placement | Slotted into the HVAC / climate-control housing behind the lower centre dashboard and centre-console trim |
| Function | Provides rapid supplementary cabin heat and supports faster windscreen demisting before normal engine-coolant heat is available |
| Visible construction | Metal fin pack, PTC resistance-heater assembly, mounting frame and high-temperature moulded electrical connector housing |
| Condition | Pre-owned recycled original-fit component. Cosmetic marks from removal and storage may be present; study all actual-item photographs. |
| Seller guarantee | 30-day parts guarantee, subject to listing terms and statutory rights |
| eBay item number | 147479020760 |
| VAT information | Sold under the VAT margin scheme for second-hand goods. VAT is not separately itemised and no reclaimable VAT invoice is available. |
Ford Focus Mk2 five-door hatchback reference
Ford Focus fitment — exact checks required
Do not order by registration year alone
This heater was only fitted to vehicles equipped with the supplemental electric air-heater system. A Focus built in a listed year can still use a different heater, connector or HVAC specification.
| Make / model | Generation / body | Production period | Required specification | Fitment status |
|---|---|---|---|---|
| Ford Focus | Mk2 / C307-CAP; hatchback, saloon or estate | 19 July 2004 to 3 January 2008 | Factory supplemental air heater; service reference 1727072; exact connector and frame match | CATALOG-CONFIRMED APPLICATION |
| Ford Focus | Mk2 facelift / CB4; 3-door or 5-door hatchback, saloon or estate | 2008-2011 | Selected vehicles only. Removed unit must show 3M51-18K463-FD / 1727072 or a separately verified interchangeable number and be physically identical. | EXACT-NUMBER DOCUMENTED — VERIFY BEFORE PURCHASE |
| Ford Focus | Any Mk1, Mk3 or later generation | Outside the Mk2 application above | Different platform or unverified heater specification | NOT ADVERTISED AS FITTING |
Engine and equipment guidance
Exact-number records exist on multiple Focus Mk2 engine variants, including documented 1.6 TDCi, 1.8 TDCi and 2.0 TDCi examples. Because the supplemental-heater option varies by market, engine, climate package and build date, this listing does not claim that every engine of those sizes is fitted with this unit.
Related applications using the same service-number family
| Vehicle family | Years / generation | Status and buyer check |
|---|---|---|
| Ford Focus C-Max | 2003-2007 / CAP | Ford catalog groups service reference 1727072 with Focus / Focus C-Max vehicles fitted with the supplemental air heater. Exact old-part comparison remains mandatory. |
| Ford C-Max facelift | 2007-2010 | Exact-number examples exist, but not guaranteed by model and year alone. Verify the full number, connector, frame and VIN. |
This part will not fit when
- The vehicle is not fitted with the factory supplemental electric air-heater system.
- The old component has a different connector, terminal layout, frame, mounting points or electrical rating.
- The buyer requires the normal coolant heater core / coolant matrix.
- The vehicle is a Focus Mk1, Focus Mk3 or later generation without independent confirmation.
- The required part is a blower resistor, blower motor, climate-control panel or fuel-fired parking heater.
- Fitment is being selected only from the registration year or visual similarity.
What the PTC heater controls and common fault symptoms
The vehicle control system operates staged electric heating according to factors including ambient temperature, engine-coolant temperature and available charging-system capacity. The purpose is to provide useful cabin warmth before the engine coolant can heat the normal heater core.
Cold cabin
Little or no rapid heat after a cold start, with warmth arriving only once the engine has fully warmed.
Slow demisting
Longer windscreen-clearing time in cold or damp weather because supplementary heat is missing.
Electrical symptoms
Stored climate or body-module fault codes, blown high-current fuse, intermittent operation, hot connector or burning smell.
Fitting instructions, tools and estimated repair time
Suggested tools
- Plastic interior-trim tools
- Torx-bit set and small socket set
- Ratchet, extensions and screwdrivers
- Battery-terminal spanner
- Digital multimeter suitable for automotive diagnosis
- Compatible diagnostic scan tool
- Protective gloves, eye protection and suitable lighting
Planning estimate
Experienced technician: approximately 2-3 labour hours.
Access, trim condition, climate-control version, wiring repairs and diagnostic time can increase the total. This is a planning estimate, not a fixed repair quotation.
Fitting service: available subject to workshop capacity and prior arrangement through eBay messages.
- Confirm the fault and part. Read diagnostic codes, check fuses and charging voltage, then compare the old unit with every listing photograph.
- Make the vehicle electrically safe. Switch off the ignition, remove the key, disconnect the battery negative terminal and wait before working around high-current heater connections.
- Remove the access trim. Protect the interior and remove the floor / centre console and relevant lower-dashboard trim following the correct workshop procedure for the vehicle specification.
- Access the HVAC housing. Remove the climate-control panel or surrounding components required to reach the electric booster-heater element.
- Disconnect and remove. Verify the circuit is de-energised, release the electrical connectors, remove the retaining fasteners and withdraw the element without damaging the HVAC casing.
- Compare side by side. Check the full part number, connector keying, fin-pack dimensions, frame shape and mounting points before installing.
- Install and reassemble. Fit the replacement, use vehicle-specific workshop torque values, secure the wiring correctly and refit all trim.
- Test the system. Reconnect the battery, clear relevant faults, check charging-system performance and verify heater operation under suitable cold-start conditions.
Estimated garage labour cost by hourly rate
Use the table as a quick guide: labour cost = garage hourly rate × labour time. Parts, VAT treatment, diagnostic charges, fluids and additional repairs are not included.
| Estimated time | £50/hour | £75/hour | £100/hour | £125/hour |
|---|---|---|---|---|
| 1.5 hours | £75.00 | £112.50 | £150.00 | £187.50 |
| 2.0 hours | £100.00 | £150.00 | £200.00 | £250.00 |
| 2.5 hours | £125.00 | £187.50 | £250.00 | £312.50 |
| 3.0 hours | £150.00 | £225.00 | £300.00 | £375.00 |
Why choose a recycled original-fit component?
Correct engineering
Designed around the vehicle's connector keying, mounting points, staged heating output and control strategy.
Potential saving
A recycled part can cost substantially less than a new dealer-supplied equivalent — in some cases up to 70%, depending on part availability and current new pricing.
Lower waste
Reusing a serviceable component keeps valuable material in circulation and reduces demand for unnecessary new manufacturing.
Low-cost pattern copies can differ in electrical resistance, connector quality, mounting accuracy and thermal protection. A correctly matched original-fit recycled part helps preserve the system design intended for the vehicle.
Prepared by an established vehicle-parts specialist
Checked identification
Part number and visible design are recorded to help buyers compare before purchase.
Careful packing
Components are prepared for transport with protection appropriate to their size, weight and exposed connectors.
Buyer support
Send the VIN, registration and a clear photograph of the removed unit through eBay messages when fitment is uncertain.
Important order information
Delivery
- UK and international delivery options are displayed by eBay at checkout.
- International availability is through eBay's eligible global shipping programme and can vary by destination and item.
- Postage is not described as free; use the checkout total shown for your address.
- Check the delivery address before paying. The seller cannot change the checkout address after the order is placed.
Returns and guarantee
- 30-day returns and a 30-day parts guarantee apply in line with the eBay listing terms and statutory rights.
- Return the same component in the same condition, with identification and security marks intact.
- Fitment notes help prevent mistakes but do not remove consumer rights.
- Contact the seller through eBay messages before installation when any number, plug or mounting detail differs.
Buy the correct part first time
- Is your vehicle a Ford Focus Mk2 / C307-CB4 within the stated 2004-2011 generation?
- Is the factory supplemental electric PTC air-heater system actually fitted to your vehicle?
- Does your old unit show the complete number 3M51-18K463-FD or a separately verified interchangeable reference?
- Are the connector shape, number of terminals, frame, dimensions and mounting points identical to the actual-item photographs?
- Have you ruled out fuses, wiring, alternator output, thermostat, blower and climate-control faults?
If any answer is uncertain, send the VIN and clear old-part photographs through eBay messages before ordering.
WhatsApp QR for Fitment Help / Appointment Enquiries
Scan the QR code to contact ThePartPilot on WhatsApp for fitment checks, appointments or fitting service availability.For faster fitment help, send your vehicle registration, VIN if available, and clear photos of your existing part, connector and part number.