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CP247
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BrandOPTIMAL
MPNA-1238G
OE refs52
SKU0129-A-1238G
GTIN / EAN4031185162760

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Details

SpecificationValue
BrandOPTIMAL
MPNa-1238g
Fitting PositionRear Axle
Piston Rod Diameter [mm]12.5 mm
Article number of recommended accessoriesAK-735410
Suspension Strut Outer Diameter [mm]39 mm

OE/OEM numbers (52)

Search by this OE number to find compatible parts

Where this part fits

Original-fit position for OE 6C0513025AT. The red ring marks where this part installs on the vehicle.

Gas shock absorber D >> - 28.08.2017 — A1 A1 (Typ 8X) Facelift (2015–2018) — suspension Shock absorbers
A1 A1 (Typ 8X) Facelift (2015–2018) · suspension Shock absorbersPosition 7

About this product

OPTIMAL shock absorber (A-1238G) 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: Rear Axle, Shock Absorber Type: Aluminium, Shock Absorber Design: Copper, 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 AUDI, SEAT, SKODA, VW applications, allowing a straight-swap installation without drilling or bracket modification. Supersedes manufacturer part numbers: 102283, 102383, 11-0172, 11-0821 and 201 more. OPTIMAL 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.

About OPTIMAL

OPTIMAL, founded in Germany, is a well-regarded aftermarket brand specialising in steering, suspension, and wheel bearing components. OPTIMAL produces ball joints, tie rod ends, control arm bushings, wheel bearings, and stabiliser links for European, Asian, and American vehicle applications. Manufactured to stringent quality standards with comprehensive testing protocols, OPTIMAL parts deliver OE-matching fit and performance. Known for excellent value and wide vehicle coverage, OPTIMAL is a popular choice among professional workshops across Europe.

Suitable cars

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ASHIKAMA-00036
BILSTEINBE3-6790
BILSTEINBNE-A957
BOGE27-D97-A
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BOGE30-Q20-0
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BOGE36-D09-0
BOGE36-D10-0
BOGE36-D11-0
BOGE36-D12-0
BOGE832675
DELPHIDG9075
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DIAMAXAP02053
EUROREPAR1623308380
FENOXA22066
GABRIEL42893
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GOLD9131419
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JAPANPARTS7170171
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JAPKOMJ00034
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JP GROUP1152108200
KAMOKA20343004
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METZGER AUTOTEILE2340084
METZGER AUTOTEILE2340106
MEYLE1267250015
MONROE376036SP
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MONROE376224SP
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MONROE376226SP
MONROE376227SP
MONROEE1221
MONROEE1274
MONROEE1308
MONROEE1309
MONROEG1335
MONROEG1340
NAPANSA1034
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NAPANSA1544
NAPANSA1549
NK63231238
NK63471239
OCAP82131RU
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Omnicraft2166021
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QUINTON HAZELL179548
QUINTON HAZELL179915
QUINTON HAZELLLIP179548
QUINTON HAZELLQAG178871
QUINTON HAZELLQAG179881
QUINTON HAZELLQAG179915
QUINTON HAZELLQAG879537
RED-LINE39VW002
SACHS280 564
SIDATF220G1343
STARLINE635790051
TRISCAN8705 29202
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VAICOV10-4251
VITAL SUSPENSIONS111842.0
VITAL SUSPENSIONS211842

Shock Absorber OPTIMAL A-1238Gcompatible car models

Car modelsAUDI: A1 (8X1, 8XK), A1 Sportback (8XA, 8XF), A2 (8Z0); SEAT: CORDOBA (6L2), IBIZA III (6L1), IBIZA IV (6J5, 6P1), IBIZA IV Hatchback Van (6J1), IBIZA IV SC (6J1, 6P5), IBIZA IV ST (6J8, 6P8); SKODA: FABIA I (6Y2), FABIA I Combi (6Y5), FABIA II (542), FABIA II Combi (545), FABIA III Estate (NJ5), FABIA III (NJ3), FABIA I Praktik (6Y5), FABIA I Saloon (6Y3); VW: POLO III CLASSIC (6V2), POLO IV (9N, 9A), POLO IV Saloon (9A4, 9A2, 9N2, 9A6), POLO IV Saloon (9N2, 9N4), POLO PLAYA, POLO V (6R1, 6C1), POLO Van V (6R1, 6C1), POLO VIVO Hatchback (6S1, 6S3)
Engines1.0 TFSI; 1.4; 1.2; 1.0; 1.6; 1.9 TDI
Year of manufacture1995-2022
Manufacturer article number (MPN)A-1238G
OE part numbers1J0512011AC, 1J0513025AJ, 1J0513025AK, 1J0513025AL, 1J0513025BB, 1J0513025BF, 1J0513025BG, 1J0513025BH, 1J0513025BL, 1J0513025BR, 1J0513025BS, 1J0513025C, 1J0513025E, 1J0513025F, 1J0513025H, 1J0513025PG, 1J0513031AK, 6C0513025AK, 6C0513025AL, 6C0 513 025 AM (+32 more)
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Description and what's included

OPTIMAL a-1238g . Article number of recommended accessories: AK-735410. Fitting Position: HA. Piston Rod Diameter [mm]: 12,5 mm. Shock Absorber Design: 4. Shock Absorber Mounting Type: 2. Shock Absorber Mounting Type: 3. Shock Absorber System: 2. Shock Absorber Type: 2

What's included:
  • 1x Shock Absorber
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 Shock Absorber compatible with my car?

This Shock Absorber fits AUDI, SEAT, SKODA, VW 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 OPTIMAL Shock Absorber have?

This OPTIMAL Shock Absorber has the following specifications: Fitting Position: HA; Shock Absorber Type: 2; Shock Absorber Design: 4; Shock Absorber System: 2; Shock Absorber Mounting Type: 2; Shock Absorber Mounting Type: 3. 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: 1J0512011AC, 1J0513025AJ, 1J0513025AK, 1J0513025AL, 1J0513025BB, 1J0513025BF, 1J0513025BG, 1J0513025BH and 44 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.

How much does a Shock Absorber cost?

This OPTIMAL Shock Absorber is available for £46.99. Shock Absorber prices vary depending on brand, specifications, and vehicle compatibility. OPTIMAL 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 1J0512011AC?

Yes, this OPTIMAL Shock Absorber is a direct replacement for OE part number 1J0512011AC. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.

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