8066 Views Updated 26 September 2026

A4031803938S Compatible Oil Cooler Cover — Mercedes-Benz

0101 049

Summary

This oil cooler cover is designed for Mercedes-Benz O 303 engines, including OM 421 and OM 421 A models. It features a sensor connection to ensure optimal oil cooling performance in heavy commercial vehicle engines. Equivalent to OE Mercedes-Benz A4031803938S.

Product identifiers
EAN Code	8699031061504

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Compatible OEM Codes

MERCEDES BENZ
- 403 180 39 38S

Description

What does an oil cooler cover do?

This oil cooler cover serves as a critical sealing component within the engine cooling system. It encloses the oil cooler housing and secures the cooling core bundle in its seat on the engine block, ensuring that engine oil and coolant remain in separate, controlled circuits.

Compatible vehicles and engines

This part is specifically engineered for Mercedes-Benz O 303 vehicles equipped with OM 421 or OM 421 A engines. It maintains the structural integrity of the oil cooling assembly under high-pressure operating conditions, providing a reliable seal for the internal channels.

Installation and maintenance

Installation requires careful attention to the sealing surfaces and bolt load to prevent leaks between the oil and coolant circuits. Technicians should verify that all sensor connections are secure and that the cover is seated correctly against the block to ensure long-term durability.

Troubleshooting and inspection

Regular inspection of the housing and sealing points can prevent overheating issues caused by pressure loss. For optimal performance, always ensure the part is compatible with the specific engine configuration of the vehicle.

OE cross-reference

0101 049 (Oil Cooler Cover) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number A4031803938S.

Technical Specifications

Technical Specifications
Sensor	OK

Other OEMs

MERCEDES BENZ

A4031803938S
A4031803938
4031803938
403.180.3938
403.180.39.38S
403.180.39.38
403 180 3938
403 180 39 38S

Compatible Vehicles

Compatible Vehicles
Brand	Model	Model Type	Engine
MERCEDES BENZ	MK	1226 AF	OM 401 LA
MERCEDES BENZ	MK	1227 A	OM 401 LA
MERCEDES BENZ	MK	1422	OM 401 LA
MERCEDES BENZ	MK	1424	OM 401 LA
MERCEDES BENZ	MK	1424 L	OM 401 LA
MERCEDES BENZ	MK	1424 LS	OM 401 LA
MERCEDES BENZ	MK	1424 S	OM 401 LA
MERCEDES BENZ	MK	1427	OM 401 LA
MERCEDES BENZ	MK	1427 F	OM 401 LA
MERCEDES BENZ	MK	1427 L	OM 401 LA
MERCEDES BENZ	MK	1427 LS	OM 401 LA
MERCEDES BENZ	MK	1427 S	OM 401 LA
MERCEDES BENZ	MK	1431	OM 401 LA
MERCEDES BENZ	MK	1431 F	OM 401 LA
MERCEDES BENZ	MK	1624 S	OM 401 LA
MERCEDES BENZ	MK	1722 K	OM 401 LA
MERCEDES BENZ	MK	1726 LL	OM 401 LA
MERCEDES BENZ	MK	1727 L	OM 401 LA
MERCEDES BENZ	MK	1824	OM 401 LA
MERCEDES BENZ	MK	1824 K	OM 401 LA
MERCEDES BENZ	MK	1827	OM 401 LA
MERCEDES BENZ	MK	1827 AK	OM 401 LA
MERCEDES BENZ	MK	1827 L	OM 401 LA
MERCEDES BENZ	MK	1827 LS	OM 401 LA
MERCEDES BENZ	MK	1827 S	OM 401 LA
MERCEDES BENZ	MK	1831	OM 401 LA
MERCEDES BENZ	MK	1831 K	OM 401 LA
MERCEDES BENZ	MK	1831 K	OM 402 LA
MERCEDES BENZ	MK	1831 L	OM 401 LA
MERCEDES BENZ	MK	1831 LS	OM 401 LA
MERCEDES BENZ	MK	1831 S	OM 401 LA
MERCEDES BENZ	MK	2327 L	OM 401 LA
MERCEDES BENZ	MK	2426 L	OM 401 LA
MERCEDES BENZ	MK	2427 B	OM 401 LA
MERCEDES BENZ	MK	2427 L	OM 401 LA
MERCEDES BENZ	MK	2431	OM 401 LA
MERCEDES BENZ	MK	2433 L	OM 401 LA
MERCEDES BENZ	MK	2524	OM 401 LA
MERCEDES BENZ	MK	2524 K	OM 401 LA
MERCEDES BENZ	MK	2524 L	OM 401 LA
MERCEDES BENZ	MK	2527	OM 401 LA
MERCEDES BENZ	MK	2527 B	OM 401 LA
MERCEDES BENZ	MK	2527 K	OM 401 LA
MERCEDES BENZ	MK	2527 L	OM 401 LA
MERCEDES BENZ	MK	2531	OM 401 LA
MERCEDES BENZ	MK	2531 B	OM 401 LA
MERCEDES BENZ	MK	2531 L	OM 401 LA
MERCEDES BENZ	MK	2534 L	OM 401 LA
MERCEDES BENZ	MK	3231 L	OM 401 LA
MERCEDES BENZ	NG	1019 AF	OM 401
MERCEDES BENZ	NG	1219 A	OM 401
MERCEDES BENZ	NG	1219 AK	OM 401
MERCEDES BENZ	NG	1219 K	OM 401
MERCEDES BENZ	NG	1222	OM 421
MERCEDES BENZ	NG	1222 A	OM 421
MERCEDES BENZ	NG	1222 AF	OM 421
MERCEDES BENZ	NG	1222 F	OM 421
MERCEDES BENZ	NG	1222 S	OM 421
MERCEDES BENZ	NG	1225 AF	OM 422
MERCEDES BENZ	NG	1228 AF	OM 422
MERCEDES BENZ	NG	1419 AK	OM 401
MERCEDES BENZ	NG	1419 K	OM 401
MERCEDES BENZ	NG	1419 LS	OM 401
MERCEDES BENZ	NG	1419 S	OM 401
MERCEDES BENZ	NG	1422	OM 421
MERCEDES BENZ	NG	1422 F	OM 421
MERCEDES BENZ	NG	1422 L	OM 421
MERCEDES BENZ	NG	1422 LS	OM 421
MERCEDES BENZ	NG	1422 S	OM 421
MERCEDES BENZ	NG	1425 AF	OM 422
MERCEDES BENZ	NG	1425 LS	OM 422
MERCEDES BENZ	NG	1425 S	OM 422
MERCEDES BENZ	NG	1428 AF	OM 422
MERCEDES BENZ	NG	1428 F	OM 422
MERCEDES BENZ	NG	1619	OM 401
MERCEDES BENZ	NG	1619 AK	OM 401
MERCEDES BENZ	NG	1619 K	OM 401
MERCEDES BENZ	NG	1619 KO	OM 401
MERCEDES BENZ	NG	1619 L	OM 401
MERCEDES BENZ	NG	1619 S	OM 401
MERCEDES BENZ	NG	1622	OM 421
MERCEDES BENZ	NG	1622 AK	OM 421
MERCEDES BENZ	NG	1622 K	OM 421
MERCEDES BENZ	NG	1622 L	OM 421
MERCEDES BENZ	NG	1622 S	OM 421
MERCEDES BENZ	NG	1625	OM 422
MERCEDES BENZ	NG	1625 AK	OM 422
MERCEDES BENZ	NG	1625 K	OM 422
MERCEDES BENZ	NG	1625 L	OM 422
MERCEDES BENZ	NG	1625 LS	OM 422
MERCEDES BENZ	NG	1625 S	OM 422
MERCEDES BENZ	NG	1626	OM 402
MERCEDES BENZ	NG	1626 AS	OM 402
MERCEDES BENZ	NG	1626 L	OM 402
MERCEDES BENZ	NG	1626 LS	OM 402
MERCEDES BENZ	NG	1626 S	OM 402
MERCEDES BENZ	NG	1628	OM 422
MERCEDES BENZ	NG	1628 A	OM 422
MERCEDES BENZ	NG	1628 L	OM 422
MERCEDES BENZ	NG	1628 LS	OM 422
MERCEDES BENZ	NG	1628 S	OM 422
MERCEDES BENZ	NG	1632	OM 403
MERCEDES BENZ	NG	1632 AK	OM 403
MERCEDES BENZ	NG	1632 AS	OM 403
MERCEDES BENZ	NG	1632 K	OM 403
MERCEDES BENZ	NG	1632 L	OM 403
MERCEDES BENZ	NG	1632 LS	OM 403
MERCEDES BENZ	NG	1632 S	OM 403
MERCEDES BENZ	NG	1922	OM 421
MERCEDES BENZ	NG	1922 AK	OM 421
MERCEDES BENZ	NG	1922 K	OM 421
MERCEDES BENZ	NG	1922 S	OM 421
MERCEDES BENZ	NG	1926	OM 402
MERCEDES BENZ	NG	1926 A	OM 402
MERCEDES BENZ	NG	1926 AK	OM 402
MERCEDES BENZ	NG	1926 AS	OM 402
MERCEDES BENZ	NG	1926 K	OM 402
MERCEDES BENZ	NG	1926 LS	OM 402
MERCEDES BENZ	NG	1926 S	OM 402
MERCEDES BENZ	NG	1928	OM 422
MERCEDES BENZ	NG	1928 A	OM 422
MERCEDES BENZ	NG	1928 AK	OM 422
MERCEDES BENZ	NG	1928 AS	OM 422
MERCEDES BENZ	NG	1928 K	OM 422
MERCEDES BENZ	NG	1928 L	OM 422
MERCEDES BENZ	NG	1928 LS	OM 422
MERCEDES BENZ	NG	1928 S	OM 422
MERCEDES BENZ	NG	1932	OM 403
MERCEDES BENZ	NG	1932 A	OM 403
MERCEDES BENZ	NG	1932 AK	OM 403
MERCEDES BENZ	NG	1932 AS	OM 403
MERCEDES BENZ	NG	1932 K	OM 403
MERCEDES BENZ	NG	1932 LS	OM 403
MERCEDES BENZ	NG	1932 S	OM 403
MERCEDES BENZ	NG	2025 S	OM 422
MERCEDES BENZ	NG	2026 S	OM 402
MERCEDES BENZ	NG	2028 A	OM 422
MERCEDES BENZ	NG	2028 LS	OM 422
MERCEDES BENZ	NG	2032 S	OM 403
MERCEDES BENZ	NG	2222	OM 421
MERCEDES BENZ	NG	2222 B	OM 421
MERCEDES BENZ	NG	2222 K	OM 421
MERCEDES BENZ	NG	2222 L	OM 421
MERCEDES BENZ	NG	2224 B	OM 402
MERCEDES BENZ	NG	2224 K	OM 402
MERCEDES BENZ	NG	2225	OM 422
MERCEDES BENZ	NG	2225 B	OM 422
MERCEDES BENZ	NG	2225 L	OM 422
MERCEDES BENZ	NG	2226	OM 402
MERCEDES BENZ	NG	2226 L	OM 402
MERCEDES BENZ	NG	2226 LS	OM 402
MERCEDES BENZ	NG	2226 S	OM 402
MERCEDES BENZ	NG	2228	OM 422
MERCEDES BENZ	NG	2228 L	OM 422
MERCEDES BENZ	NG	2228 S	OM 422
MERCEDES BENZ	NG	2232	OM 403
MERCEDES BENZ	NG	2232 L	OM 403
MERCEDES BENZ	NG	2232 LS	OM 403
MERCEDES BENZ	NG	2232 S	OM 403
MERCEDES BENZ	NG	2422	OM 421
MERCEDES BENZ	NG	2422 K	OM 421
MERCEDES BENZ	NG	2425	OM 422
MERCEDES BENZ	NG	2428	OM 422
MERCEDES BENZ	NG	2528 A	OM 422
MERCEDES BENZ	NG	2528 AK	OM 422
MERCEDES BENZ	NG	2626 AB	OM 402
MERCEDES BENZ	NG	2626 AK	OM 402
MERCEDES BENZ	NG	2626 B	OM 402
MERCEDES BENZ	NG	2626 K	OM 402
MERCEDES BENZ	NG	2628	OM 422
MERCEDES BENZ	NG	2628 A	OM 422
MERCEDES BENZ	NG	2628 AK	OM 422
MERCEDES BENZ	NG	2628 AS	OM 422
MERCEDES BENZ	NG	2628 B	OM 422
MERCEDES BENZ	NG	2628 K	OM 422
MERCEDES BENZ	NG	2628 S	OM 422
MERCEDES BENZ	NG	2632	OM 403
MERCEDES BENZ	NG	2632 A	OM 403
MERCEDES BENZ	NG	2632 AK	OM 403
MERCEDES BENZ	NG	2632 AS	OM 403
MERCEDES BENZ	NG	2632 K	OM 403
MERCEDES BENZ	NG	2632 S	OM 403
MERCEDES BENZ	NG	3025 B	OM 422
MERCEDES BENZ	NG	3025 K	OM 422
MERCEDES BENZ	NG	3028	OM 422
MERCEDES BENZ	NG	3028 B	OM 422
MERCEDES BENZ	NG	3028 K	OM 422
MERCEDES BENZ	NG	3228 B	OM 422
MERCEDES BENZ	NG	3228 K	OM 422
MERCEDES BENZ	NG	3328	OM 422
MERCEDES BENZ	NG	3328 B	OM 422
MERCEDES BENZ	NG	3328 K	OM 422
MERCEDES BENZ	NG	3528	OM 422
MERCEDES BENZ	NG	3528 B	OM 422
MERCEDES BENZ	NG	3528 K	OM 422
MERCEDES BENZ	O 302	O 302	OM 421
MERCEDES BENZ	O 303	O 303	OM 401
MERCEDES BENZ	O 303	O 303	OM 401 (RAM-Air)
MERCEDES BENZ	O 303	O 303	OM 402
MERCEDES BENZ	O 303	O 303	OM 403
MERCEDES BENZ	O 303	O 303	OM 421
MERCEDES BENZ	O 303	O 303	OM 421 A
MERCEDES BENZ	O 303	O 303	OM 422
MERCEDES BENZ	O 303	O 303	OM 441 A
MERCEDES BENZ	OH	1622	OM 421
MERCEDES BENZ	OH	1622 L	OM 421
MERCEDES BENZ	OH	1625	OM 422
MERCEDES BENZ	OH	1625 L	OM 422
MERCEDES BENZ	OH	1628	OM 422
MERCEDES BENZ	OH	1628 L	OM 422
MERCEDES BENZ	SK	1831	OM 401 LA
MERCEDES BENZ	SK	1831 K	OM 401 LA
MERCEDES BENZ	SK	1831 L	OM 401 LA
MERCEDES BENZ	SK	1831 LS	OM 401 LA
MERCEDES BENZ	SK	1831 S	OM 401 LA
MERCEDES BENZ	SK	2024	OM 401 LA
MERCEDES BENZ	SK	2024 K	OM 401 LA
MERCEDES BENZ	SK	2031	OM 401 LA
MERCEDES BENZ	SK	2031 K	OM 401 LA
MERCEDES BENZ	SK	2031 S	OM 401 LA
MERCEDES BENZ	SK	2429	OM 422
MERCEDES BENZ	SK	2531	OM 401 LA
MERCEDES BENZ	SK	2531 L	OM 401 LA
MERCEDES BENZ	SK	2629 K	OM 401 LA
MERCEDES BENZ	SK	2631	OM 401 LA
MERCEDES BENZ	SK	2631 B	OM 401 LA
MERCEDES BENZ	SK	2631 K	OM 401 LA
MERCEDES BENZ	SK	2631 S	OM 401 LA
MERCEDES BENZ	SK	3238	OM 402 LA
MERCEDES BENZ	SK	3538	OM 402 LA
MERCEDES BENZ	SK	3538 AK	OM 402 LA
MERCEDES BENZ	SK	3538 K	OM 402 LA
NEOPLAN	Cityliner	N 217/3	OM 402
NEOPLAN	Cityliner	N 217/3	OM 422
NEOPLAN	Jetliner	N 216	OM 422
NEOPLAN	Transliner	N 316	OM 401

FAQ

What is the function of an oil cooler cover?

It encloses the oil cooler housing and holds the cooling core bundle sealed in its seat, keeping oil and coolant in separate circuits.

Which engines is this cover compatible with?

This part is designed for Mercedes-Benz O 303 engines, specifically for the OM 421 and OM 421 A models.

Does this part include sensor connections?

Yes, this specific version is compatible with systems that require a sensor connection to monitor engine vitals.

How can I tell if an oil cooler cover needs replacement?

Look for signs of leakage between the oil and coolant circuits or signs of improper sealing around the housing assembly.

What are the OE reference numbers of this part?

0101 049 directly replaces Mercedes-Benz OE number A4031803938S.