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Details
| Specification | Value |
|---|---|
| Brand | BREMI |
| Voltage [V] | 5 V |
| Connector type | Ø 4mm |
| Diameter [mm] | 5 mm |
| Length [mm] | 133.5 mm |
| Thread Size | M10x1 |
| Current Strength [A] | 8.5 A |
| Glow Plug Design | SK |
| Glow Plug Design | NG |
| Fitting Depth [mm] | 28.5 mm |
| Tightening torque from [Nm] | 10 Nm |
| Tightening torque to [Nm] | 15 Nm |
OE numbers (2)
Search by this OE number to find compatible parts
- BMW—12 23 7 788 957
- BMW—7 788 957
Where this part fits
Original-fit position for OE 12237788957.
About this product
BREMI Glow Plug (26503) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Voltage [V]: Rubber V, Connector type: Ø 4mm, Cone Pitch: 63, Diameter [mm]: Rubber mm, Length [mm]: 133, Rubber mm — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with BMW vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 0 100 266 003, 062900078304, 12 23 7 788 957, 13721138 and 29 more. Matching these numbers confirms a like-for-like replacement with no loss of function. BREMI 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 with tracked delivery and a 14-day money-back guarantee with 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.
Suitable cars
Equivalent products (34)
Show all 34 OE numbers
Glow Plug BREMI 26503 — compatible car models
| Car models | BMW: 7 (E65, E66, E67) |
|---|---|
| Engines | 740 d |
| Year of manufacture | 2001-2009 |
| Manufacturer article number (MPN) | 26503 |
| OE part numbers | 12 23 7 788 957, 7 788 957 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
BREMI 26503 . Cone Pitch: 63. Connector type: Ø 4mm. Current Strength [A]: 8,5 A. Diameter [mm]: 5 mm. Fitting Depth [mm]: 28,5 mm. Glow Plug Design: NG. Glow Plug Design: SK. Length [mm]: 133,5 mm
- 1x Glow Plug
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- 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?
This Glow Plug fits BMW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this BREMI Glow Plug have?
This BREMI Glow Plug has the following specifications: Voltage [V]: 5 V; Connector type: Ø 4mm; Cone Pitch: 63; Diameter [mm]: 5 mm; Length [mm]: 133,5 mm; Thread Size: M10x1. 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: 12 23 7 788 957, 7 788 957. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Glow Plug cost?
This BREMI Glow Plug is available for £17.99. Glow Plug prices vary depending on brand, specifications, and vehicle compatibility. BREMI parts offer a balance of quality and value, backed by 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 12 23 7 788 957?
Yes, this BREMI Glow Plug is a direct replacement for OE part number 12 23 7 788 957. 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 BREMI 26503 the same as the BREMI 26018?
No, while both are Glow Plug parts, they are different products. The BREMI 26503 has Voltage [V]: 5 V, Connector type: Ø 4mm, Cone Pitch: 63. The BREMI 26018 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.
