No product images available
Specs, fitment data and pricing remain accurate.- Shop with confidence: competitive prices, exclusive deals, and delivery perks.
- Need it quickly? We dispatch fast-moving parts daily. Check delivery options.
- Swap or return items within the standard return period with a simple process.
- Questions about fitment or orders? Our support team is ready to help.
Similar products
Customers also bought
Details
| Specification | Value |
|---|---|
| Brand | BorgWarner (BERU) |
| MPN | z521 |
| Electrode Gap [mm] | 1 mm |
| Thread Size | M14x1.25 |
| Spanner Size | 16mm |
| Thread Length [mm] | 19 mm |
| Tightening torque from [Nm] | 25 Nm |
| Tightening torque to [Nm] | 30 Nm |
| Packaging length [cm] | 9 cm |
| Packaging width [cm] | 2 cm |
| Packaging height [cm] | 2 cm |
| Resistor from [kOhm] | 1 kOhm |
| Resistor to [kOhm] | 3 kOhm |
OE/OEM numbers (5)
Search by this OE number to find compatible parts
- AUDI / BENTLEY / LAMBORGHINI / SEAT / SKODA / VW—101 000 033 AA
- AUDI / BENTLEY / LAMBORGHINI / SEAT / SKODA / VW—101 000 033 AF
- AUDI / BENTLEY / LAMBORGHINI / SEAT / SKODA / VW—101 000 041 AC
- AUDI / BENTLEY / LAMBORGHINI / SEAT / SKODA / VW—101 000 051 AA
- SEAT—101 000 051 AC
Where this part fits
Original-fit position for OE 101000033AA. The red ring marks where this part installs on the vehicle.
About this product
BorgWarner (BERU) spark plug (Z521) fires the air-fuel charge with a precisely controlled spark at the correct electrode gap and heat range for your engine's combustion chamber geometry. Plug parameters — Electrode Gap [mm]: Steel mm, Thread Size: M14x1.25, Spanner Size: 16mm, Thread Length [mm]: Synthetic mm — determine ignition timing accuracy, electrode longevity, and resistance to pre-ignition deposits across the full RPM range. Thread reach, seat type, and hex size are specified to fit AUDI, SEAT, SKODA, VW cylinder heads without re-gapping or thread chasing. Replaces OE ignition references: 0001335107, 0 241 235 697, 0 241 235 706, 0 241 235 752 and 38 more. BorgWarner (BERU) ignition components are manufactured to SAE and DIN specifications and are approved for use in vehicles covered by manufacturer service agreements throughout Europe. Standard copper-core spark plugs last around 20,000–30,000 miles, while iridium or platinum-tipped plugs can last 60,000–100,000 miles — always follow the interval specified in your vehicle's service schedule. Symptoms of worn spark plugs include rough idling, engine misfires (often felt as a stumble under acceleration), increased fuel consumption, and difficulty starting in cold weather. Spark plug replacement is a straightforward DIY job on most engines — you need a spark plug socket, a torque wrench, and a gap gauge; allow 30–60 minutes for a four-cylinder engine, longer for boxer or V-configurations where access is tighter. Always match the heat range and electrode material specified by your engine manufacturer — fitting a plug with the wrong heat range can cause pre-ignition, fouling, or catalytic converter damage. Replacing spark plugs on schedule maintains optimal combustion efficiency, reduces harmful emissions, and prevents unburnt fuel from damaging the catalytic converter — a component that costs many times more to replace. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Suitable cars
Equivalent products (37)
Show all 37 OE numbers
Spark Plug BorgWarner (BERU) Z521 — compatible car models
| Car models | AUDI: A2 (8Z0), A3 (8L1), A3 (8P1), A3 Convertible (8P7), A3 Sportback (8PA), A4 B5 (8D2), A4 B5 Avant (8D5), A4 B6 (8E2), A4 B6 Avant (8E5), A4 B7 (8EC) (+6 more); SEAT: ALHAMBRA (7V8, 7V9), ALTEA (5P1), ALTEA XL (5P5, 5P8), AROSA (6H1), CORDOBA (6L2), EXEO (3R2), EXEO ST (3R5), IBIZA III (6L1), IBIZA IV (6J5, 6P1), IBIZA IV SC (6J1, 6P5) (+4 more) |
|---|---|
| Engines | 1.4; 1.6; 1.8; 2.8; 1.8 T; 2.0 i; 1.4 16V; 2.0 |
| Year of manufacture | 1994-2018 |
| Manufacturer article number (MPN) | Z521 |
| OE part numbers | 101 000 033 AA, 101 000 033 AF, 101 000 041 AC, 101 000 051 AA, 101 000 051 AC |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
BorgWarner (BERU) z521 . Electrode Gap [mm]: 1 mm. Packaging height [cm]: 2 cm. Packaging length [cm]: 9 cm. Packaging width [cm]: 2 cm. Resistor from [kOhm]: 1 kOhm. Resistor to [kOhm]: 3 kOhm. Spanner Size: 16mm. Thread Length [mm]: 19 mm
- 1x Spark Plug
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 Spark Plug compatible with my car?
This Spark Plug 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 BorgWarner (BERU) Spark Plug have?
This BorgWarner (BERU) Spark Plug has the following specifications: Electrode Gap [mm]: 1 mm; Thread Size: M14x1.25; Spanner Size: 16mm; Thread Length [mm]: 19 mm; Tightening torque from [Nm]: 25 Nm; Tightening torque to [Nm]: 30 Nm. Check the full specifications table above for complete details.
What OE part numbers does this Spark Plug replace?
This Spark Plug replaces OE part numbers: 101 000 033 AA, 101 000 033 AF, 101 000 041 AC, 101 000 051 AA, 101 000 051 AC. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Spark Plug cost?
This BorgWarner (BERU) Spark Plug is available for £4.99. Spark Plug prices vary depending on brand, specifications, and vehicle compatibility. BorgWarner (BERU) parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Spark Plug?
Signs include rough idling, difficulty starting, engine misfires, increased fuel consumption, or lack of acceleration. Most spark plugs should be replaced every 30,000-60,000 miles for copper, or 60,000-100,000 miles for iridium/platinum.
What tools do I need to replace a Spark Plug?
Tools needed: spark plug socket (16mm or 21mm, with rubber insert), torque wrench (20-30 Nm typical -- check vehicle spec), ratchet with 3-inch extension, feeler gauge for gap check, anti-seize compound. Difficulty: Moderate DIY. Safety warning: Allow the engine to cool fully before removing plugs. Over-torquing will strip aluminium cylinder head threads -- always use a torque wrench.
Can I use this part as a replacement for OE 101 000 033 AA?
Yes, this BorgWarner (BERU) Spark Plug is a direct replacement for OE part number 101 000 033 AA. 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 BorgWarner (BERU) Z521 the same as the BorgWarner (BERU) Z100?
No, while both are Spark Plug parts, they are different products. The BorgWarner (BERU) Z521 has Electrode Gap [mm]: 1 mm, Thread Size: M14x1.25, Spanner Size: 16mm. The BorgWarner (BERU) Z100 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.
