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Details
| Specification | Value |
|---|---|
| Brand | OPTIMAL |
| MPN | op-fof40121 |
| Category | Engine Oil Filter |
| Height [mm] | 78 mm |
| Thread Size | 3/4-16 UNF |
| Inner Diameter [mm] | 71 mm |
| Outer Diameter [mm] | 78 mm |
| Outer Diameter 2 [mm] | 76 mm |
| Inner Diameter 2 [mm] | 63 mm |
OE numbers (13)
Search by this OE number to find compatible parts
- PEUGEOT—1109 A6
- BMW—11 42 1 250 534
- BMW—11 42 1 258 038
- BMW—11 42 1 258 039
- BMW—11 42 1 267 597
- BMW—11 42 1 272 604
- BMW—11 42 1 276 850
- BMW—11 42 1 278 059
- BMW—11 42 1 417 406
- BMW—11 42 9 061 197
- FORD—5009 088
- RENAULT / RENAULT KOREA—77 01 415 061
- CATERPILLAR—9Y-4492
Where this part fits
Original-fit position for OE 11421258038. The red ring marks where this part installs on the vehicle.
About this product
The OPTIMAL Engine Oil Filter (OP-FOF40121) 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: Height [mm]: 78 mm, Thread Size: 3/4-16 UNF, Inner Diameter [mm]: 71 mm, Outer Diameter [mm]: 78 mm, Filter type: Steel. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BMW 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: 0 451 103 050, 1109 A6, 11 42 1 250 534, 11 42 1 258 038 and 37 more. Matching these numbers confirms a like-for-like replacement with no loss of function. OPTIMAL is a recognised supplier of automotive filtration 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.
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
Equivalent products (30)
Show all 30 OE numbers
Engine Oil Filter OPTIMAL OP-FOF40121 — compatible car models
| Car models | BMW: 1500-2000 (115, 116, 118, 121), 1502-2002 Convertible (E10), 1502-2002 (E10), 1502-2002 Touring (E6), 3 Convertible (E30), 3 (E21), 3 (E30), 5 (E12), 5 (E28) |
|---|---|
| Engines | 2000; 2002; 1502; 1802; M3 2.3; 315; 518 |
| Year of manufacture | 1962-1993 |
| Manufacturer article number (MPN) | OP-FOF40121 |
| OE part numbers | 1109 A6, 11 42 1 250 534, 11 42 1 258 038, 11 42 1 258 039, 11 42 1 267 597, 11 42 1 272 604, 11 42 1 276 850, 11 42 1 278 059, 11 42 1 417 406, 11 42 9 061 197, 5009 088, 77 01 415 061, 9Y-4492 |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
OPTIMAL op-fof40121 Engine Oil Filter. Filter type: 1. Height [mm]: 78 mm. Inner Diameter 2 [mm]: 63 mm. Inner Diameter [mm]: 71 mm. Outer Diameter 2 [mm]: 76 mm. Outer Diameter [mm]: 78 mm. Thread Size: 3/4-16 UNF
- 1x Engine Oil Filter
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 Engine Oil Filter compatible with my car?
This Engine Oil Filter fits BMW 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 Engine Oil Filter have?
This OPTIMAL Engine Oil Filter has the following specifications: Height [mm]: 78 mm; Thread Size: 3/4-16 UNF; Inner Diameter [mm]: 71 mm; Outer Diameter [mm]: 78 mm; Filter type: 1; Outer Diameter 2 [mm]: 76 mm. Check the full specifications table above for complete details.
What OE part numbers does this Engine Oil Filter replace?
This Engine Oil Filter replaces OE part numbers: 1109 A6, 11 42 1 250 534, 11 42 1 258 038, 11 42 1 258 039, 11 42 1 267 597, 11 42 1 272 604, 11 42 1 276 850, 11 42 1 278 059 and 5 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Engine Oil Filter cost?
Engine Oil Filter prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this OPTIMAL Engine Oil Filter. All parts come with our 14-day money-back guarantee.
How do I know when to replace my Engine Oil Filter?
Oil filters should be replaced with every oil change, typically every 10,000-15,000 miles or annually. Signs of a failing oil filter include low oil pressure warning light, dirty exhaust smoke, or engine overheating.
What tools do I need to replace a Engine Oil Filter?
Tools needed: oil filter wrench (cap or strap type, sized to your filter), drain pan (5+ litre), 17mm drain plug socket, funnel, fresh engine oil, new drain plug washer. Difficulty: Easy DIY. Safety warning: Allow the engine to cool for at least 30 minutes before draining -- hot oil causes serious burns.
Can I use this part as a replacement for OE 1109 A6?
Yes, this OPTIMAL Engine Oil Filter is a direct replacement for OE part number 1109 A6. 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.
