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Details
| Specification | Value |
|---|---|
| Brand | HERTH+BUSS JAKOPARTS |
| MPN | j4303004 |
| Fitting Position | Front Left |
| paired article number | J4313004 |
OE numbers (10)
Search by this OE number to find compatible parts
- MAZDA—B30D-34-900B
- MAZDA—B30D-34-900C
- MAZDA—B30P-34-900B
- MAZDA—B30P-34-900C
- MAZDA—BL2A-34-900A
- MAZDA—BL2A-34-900B
- MAZDA—BL2A-34-900C
- MAZDA—CB80-34-900
- MAZDA—CB80-34-900B
- MAZDA—CC11-34-900B
Where this part fits
Original-fit position for OE CB8034900B.
About this product
HERTH+BUSS JAKOPARTS shock absorber (J4303004) restores factory damping characteristics by controlling spring oscillation on both compression and rebound strokes, recovering steering precision and reducing body roll. Damping configuration — Fitting Position: Front Left, Shock Absorber Type: Aluminium, Shock Absorber Design: Aluminium, Shock Absorber System: Aluminium — is tuned to the original suspension geometry so spring rates and ride height are unaffected, preserving the manufacturer's comfort and handling balance. Mounting dimensions, piston diameter, and stroke length replicate the OEM unit on MAZDA applications, allowing a straight-swap installation without drilling or bracket modification. Supersedes manufacturer part numbers: 062144GLB, 09-1419FGL, 09-1436FGL, 110481.1 and 82 more. HERTH+BUSS JAKOPARTS dampers are gas-pressure charged, zero-leakage tested on a servo-hydraulic rig, and carry a 2-year unlimited-mileage warranty against manufacturing defects. Shock absorbers gradually lose damping force over time and should be inspected at 50,000 miles and replaced by 80,000–100,000 miles — even if they are not visibly leaking, internal valve wear reduces their effectiveness. Warning signs include excessive body roll in corners, nose-dive under braking, rear-end squat during acceleration, uneven tyre wear, and a bouncy or floaty ride — a simple bounce test (push down on each corner and release) can reveal weak dampers. Shock absorber replacement is an intermediate DIY task that requires spring compressors (for strut-type assemblies), a torque wrench, and penetrating oil for corroded fasteners — allow 2–3 hours per axle. When selecting shock absorbers, match the damper type (twin-tube, monotube, or gas-pressurised) to the original specification — upgrading to a different type can alter ride height and handling characteristics. Always replace shock absorbers in pairs (both sides of the same axle) to maintain balanced handling, and have the wheel alignment checked afterwards — worn dampers often allow geometry to drift out of specification. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Equivalent products (76)
Show all 76 OE numbers
Shock Absorber HERTH+BUSS JAKOPARTS J4303004 — compatible car models
| Car models | MAZDA: 323 F VI Hatchback (BJ), 323 S VI Saloon (BJ), PREMACY (CP), PREMACY Van (CP) |
|---|---|
| Engines | 1.3 16V (BJ3P, BJ14); 1.3 16V (BJ3P); 1.9 (CP10P); 1.8 (CP19) |
| Year of manufacture | 1998-2005 |
| Manufacturer article number (MPN) | J4303004 |
| OE part numbers | B30D-34-900B, B30D-34-900C, B30P-34-900B, B30P-34-900C, BL2A-34-900A, BL2A-34-900B, BL2A-34-900C, CB80-34-900, CB80-34-900B, CC11-34-900B |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
HERTH+BUSS JAKOPARTS j4303004 . Fitting Position: VL. paired article number: J4313004. Shock Absorber Design: 2. Shock Absorber Mounting Type: 3. Shock Absorber System: 2. Shock Absorber Type: 2
- 1x Shock Absorber
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 Shock Absorber compatible with my car?
This Shock Absorber 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 HERTH+BUSS JAKOPARTS Shock Absorber have?
This HERTH+BUSS JAKOPARTS Shock Absorber has the following specifications: Fitting Position: VL; Shock Absorber Type: 2; Shock Absorber Design: 2; Shock Absorber System: 2; Shock Absorber Mounting Type: 3; paired article number: J4313004. Check the full specifications table above for complete details.
What OE part numbers does this Shock Absorber replace?
This Shock Absorber replaces OE part numbers: B30D-34-900B, B30D-34-900C, B30P-34-900B, B30P-34-900C, BL2A-34-900A, BL2A-34-900B, BL2A-34-900C, CB80-34-900 and 2 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Shock Absorber cost?
This HERTH+BUSS JAKOPARTS Shock Absorber is available for £43.99. Shock Absorber prices vary depending on brand, specifications, and vehicle compatibility. HERTH+BUSS JAKOPARTS parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Shock Absorber?
Look for excessive bouncing over bumps, nose-diving during braking, uneven tyre wear, fluid leaks on the shock body, or poor handling. Shocks should be inspected every 50,000 miles.
What tools do I need to replace a Shock Absorber?
Tools needed: floor jack, axle stands, 18-21mm socket for wheel bolts, spring compressor (if top mount must be removed), 17-19mm open-end spanner for shock piston nut, torque wrench. Difficulty: Moderate DIY. Safety warning: Coil springs store enormous energy -- only use purpose-built automotive spring compressors rated for the load. A spring released unexpectedly can cause fatal injury. Never improvise with non-rated tools.
Can I use this part as a replacement for OE B30D-34-900B?
Yes, this HERTH+BUSS JAKOPARTS Shock Absorber is a direct replacement for OE part number B30D-34-900B. 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 HERTH+BUSS JAKOPARTS J4303004 the same as the HERTH+BUSS JAKOPARTS J4300507?
No, while both are Shock Absorber parts, they are different products. The HERTH+BUSS JAKOPARTS J4303004 has Fitting Position: VL, Shock Absorber Type: 2, Shock Absorber Design: 2. The HERTH+BUSS JAKOPARTS J4300507 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.
