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Details
| Specification | Value |
|---|---|
| Brand | DT Spare Parts |
| MPN | 1.21104 |
| Voltage [V] | 24 V |
| Net Weight [g] | 25 g |
OE numbers (2)
About this product
The DT Spare Parts Relay (1.21104) 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]: 24 V, for OE number: 1304421, Guarantee: Aluminium, Net Weight [g]: 25 g. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 044.318, 09964, 1.21104 H+B/42644, 121104HB42644 and 10 more. Matching these numbers confirms a like-for-like replacement with no loss of function. DT Spare Parts 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.
Relay buying guide
Why replace this part?
Relays are electrically-operated switches that control high-current circuits (fuel pump, fan, starter, horn) from a low-current trigger. A failed relay can disable critical systems without visible damage and is often overlooked during diagnostics.
Signs you need a replacement
- Component controlled by the relay fails to operate
- intermittent operation
- clicking from the relay box but no function
- relay runs hot or smells burnt
When to replace
No fixed interval — replace on failure. Always carry spare relays for critical circuits such as the fuel pump relay and fan relay.
Suitable cars
Fitment not confirmed for this part
We could not confirm which vehicles this part fits — check before buying.Equivalent products (14)
Relay DT Spare Parts 1.21104 — compatible car models
| Manufacturer article number (MPN) | 1.21104 |
|---|---|
| OE part numbers | 1304421, 383053 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
DT Spare Parts 1.21104 . for OE number: 1304421. Guarantee: 2. Net Weight [g]: 25 g. Voltage [V]: 24 V
- 1x Relay
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 4–8 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 Relay 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 Relay fits. All fitment data is verified through TecDoc.
What specifications does this DT Spare Parts Relay have?
This DT Spare Parts Relay has the following specifications: Voltage [V]: 24 V; for OE number: 1304421; Guarantee: 2; Net Weight [g]: 25 g. Check the full specifications table above for complete details.
What OE part numbers does this Relay replace?
This Relay replaces OE part numbers: 1304421, 383053. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Relay cost?
This DT Spare Parts Relay is available for £39.99. Relay prices vary depending on brand, specifications, and vehicle compatibility. DT Spare Parts parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Relay?
A faulty relay causes the circuit it controls (fuel pump, cooling fan, starter, etc.) to fail intermittently or completely. Signs are component-specific: a dead cooling fan, a fuel pump that doesn't prime, or a starter that doesn't engage.
What tools do I need to replace a Relay?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Relay fitted by a professional mechanic.
Can I use this part as a replacement for OE 1304421?
Yes, this DT Spare Parts Relay is a direct replacement for OE part number 1304421. 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 DT Spare Parts 1.21104 the same as the DT Spare Parts 1.21093?
No, while both are Relay parts, they are different products. The DT Spare Parts 1.21104 has Voltage [V]: 24 V, for OE number: 1304421, Guarantee: 2. The DT Spare Parts 1.21093 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.