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Details
| Specification | Value |
|---|---|
| Brand | BOSCH |
| MPN | f005x12944 |
| Voltage [V] | 11 V |
| Connector type | M 4 |
| Length [mm] | 12 mm |
| Fitting Depth [mm] | 22 mm |
| Thread Size 1 | M 10 x 1.25 |
| Tightening torque to [Nm] | 20 Nm |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- MAZDA—RFG1-18-601
- MAZDA—RFJ5-18-601
Where this part fits
Original-fit position for OE RFG118601. The red ring marks where this part installs on the vehicle.
About this product
The BOSCH Glow Plug (F 005 X12 944) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Voltage [V]: Bronze V, Connector type: M 4, Cone Pitch: 120, Length [mm]: Zinc mm, Spanner Size: Stainless Steel. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: PZ38, RFG1-18-601, RFJ5-18-601. Matching these numbers confirms a like-for-like replacement with no loss of function. BOSCH is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Glow Plug buying guide
Why replace this part?
Glow plugs pre-heat diesel combustion chambers to ensure reliable cold starting and clean combustion on startup. Worn glow plugs cause difficult cold-weather starting, white smoke on startup, and increased wear on starter motors.
Signs you need a replacement
- Difficult starting in cold weather
- white or blue smoke on cold start
- glow plug warning light staying on
- engine misfiring during warm-up
- increased starter motor cranking time
When to replace
Every 60,000–80,000 miles or when cold-starting problems develop. Replace all plugs as a set — a single failed plug causes uneven cylinder temperatures.
About BOSCH
Robert Bosch GmbH, founded in 1886 in Stuttgart, Germany, is one of the world's largest automotive parts suppliers. Bosch specialises in braking systems, fuel injection, spark plugs, alternators, and electronic engine management. As an OE supplier to virtually every major car manufacturer, Bosch parts meet or exceed original equipment specifications. With over 130 years of engineering innovation, choosing Bosch means choosing proven reliability backed by extensive research and development.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (1)
Glow Plug BOSCH F 005 X12 944 — compatible car models
| Manufacturer article number (MPN) | F 005 X12 944 |
|---|---|
| OE part numbers | RFG1-18-601, RFJ5-18-601 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
BOSCH f005x12944 . Cone Pitch: 120. Connector type: M 4. Fitting Depth [mm]: 22 mm. Length [mm]: 12 mm. Spanner Size: 9. Thread Size 1: M 10 x 1,25. Tightening torque to [Nm]: 20 Nm. Voltage [V]: 11 V
- 1x Glow Plug
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Glow Plug compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Glow Plug fits. All fitment data is verified through TecDoc.
What specifications does this BOSCH Glow Plug have?
This BOSCH Glow Plug has the following specifications: Voltage [V]: 11 V; Connector type: M 4; Cone Pitch: 120; Length [mm]: 12 mm; Spanner Size: 9; Fitting Depth [mm]: 22 mm. Check the full specifications table above for complete details.
What OE part numbers does this Glow Plug replace?
This Glow Plug replaces OE part numbers: RFG1-18-601, RFJ5-18-601. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Glow Plug cost?
Glow Plug prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this BOSCH Glow Plug. All parts come with our 14-day money-back guarantee.
How do I know when to replace my Glow Plug?
On diesel engines: difficulty starting in cold weather, excessive white smoke from the exhaust on startup, rough running until the engine warms, the glow plug warning light staying on, or one cylinder misfiring when cold.
What tools do I need to replace a Glow Plug?
Tools needed: 10mm hex deep socket for glow plug, torque wrench (10-15 Nm), penetrating oil (apply 24 hours before removal on high-mileage engines), glow plug extraction kit (for seized plugs). Difficulty: Moderate DIY. Safety warning: Apply penetrating oil well in advance on older diesel engines -- forced removal of seized glow plugs snaps them in the cylinder head, requiring specialist extraction. Never over-torque replacements.
Can I use this part as a replacement for OE RFG1-18-601?
Yes, this BOSCH Glow Plug is a direct replacement for OE part number RFG1-18-601. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the BOSCH F 005 X12 944 the same as the BOSCH 0 250 200 055?
No, while both are Glow Plug parts, they are different products. The BOSCH F 005 X12 944 has Voltage [V]: 11 V, Connector type: M 4, Cone Pitch: 120. The BOSCH 0 250 200 055 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
