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Details
| Specification | Value |
|---|---|
| Brand | HEPU |
| MPN | 21-5091 |
| Operating Mode | EG |
OE numbers (2)
Search by this OE number to find compatible parts
- MAZDA—L309-14-420A
- MAZDA—L3K9-14-420A
Where this part fits
Original-fit position for OE L3K914420A. The red ring marks where this part installs on the vehicle.
About this product
The HEPU Control Valve Camshaft Adjustment (21-5091) 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: Operating Mode: EG, Valve Type: 40. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit MAZDA models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 0899126, 57747, L309-14-420A, L3K9-14-420A and 2 more. Matching these numbers confirms a like-for-like replacement with no loss of function. HEPU 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.
Suitable cars
Equivalent products (4)
Control Valve Camshaft Adjustment HEPU 21-5091 — compatible car models
| Car models | MAZDA: 3 (BK), 3 (BL), 3 Saloon (BK), 3 Saloon (BL), 5 (CW), 6 Estate (GH), 6 Hatchback (GH), 6 Saloon (GH), CX-7 (ER) |
|---|---|
| Engines | 2.3 MPS Turbo (BK14); 2.0 MZR (BLEFW); 2.0 (BKEP); 2.0 MZR (BL12, BLEFP); 2.0 (CWEFW); 2.0 MZR (GHEFW); 2.0 MZR (GHEFS); 2.0 MZR (GHEFP); 2.3 MZR DISI Turbo AWD (ER3P) |
| Year of manufacture | 1999-2014 |
| Manufacturer article number (MPN) | 21-5091 |
| OE part numbers | L309-14-420A, L3K9-14-420A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
HEPU 21-5091 IPD inside. Operating Mode: EG. Valve Type: 40
- 1x Control Valve Camshaft Adjustment
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 Control Valve Camshaft Adjustment compatible with my car?
This Control Valve Camshaft Adjustment fits MAZDA 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 HEPU Control Valve Camshaft Adjustment have?
This HEPU Control Valve Camshaft Adjustment has the following specifications: Operating Mode: EG; Valve Type: 40. Check the full specifications table above for complete details.
What OE part numbers does this Control Valve Camshaft Adjustment replace?
This Control Valve Camshaft Adjustment replaces OE part numbers: L309-14-420A, L3K9-14-420A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Control Valve Camshaft Adjustment cost?
This HEPU Control Valve Camshaft Adjustment is available for £65.99. Control Valve Camshaft Adjustment prices vary depending on brand, specifications, and vehicle compatibility. HEPU parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Control Valve Camshaft Adjustment?
Regular inspection of your Control Valve Camshaft Adjustment is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Control Valve Camshaft Adjustment?
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 Control Valve Camshaft Adjustment fitted by a professional mechanic.
Can I use this part as a replacement for OE L309-14-420A?
Yes, this HEPU Control Valve Camshaft Adjustment is a direct replacement for OE part number L309-14-420A. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
